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overflow: hidden; text-overflow: ellipsis; -webkit-line-clamp: 3; -webkit-box-orient: vertical; }</style><div class="col-xs-12 clearfix"><div class="u-floatLeft"><h1 class="PageHeader-title u-m0x u-fs30">Igneous petrology</h1><div class="u-tcGrayDark">33,225 Followers</div><div class="u-tcGrayDark u-mt2x">Recent papers in <b>Igneous petrology</b></div></div></div></div></div></div><div class="TabbedNavigation"><div class="container"><div class="row"><div class="col-xs-12 clearfix"><ul class="nav u-m0x u-p0x list-inline u-displayFlex"><li class="active"><a href="https://www.academia.edu/Documents/in/Igneous_petrology">Top Papers</a></li><li><a href="https://www.academia.edu/Documents/in/Igneous_petrology/MostCited">Most Cited Papers</a></li><li><a href="https://www.academia.edu/Documents/in/Igneous_petrology/MostDownloaded">Most Downloaded Papers</a></li><li><a href="https://www.academia.edu/Documents/in/Igneous_petrology/MostRecent">Newest Papers</a></li><li><a class="" href="https://www.academia.edu/People/Igneous_petrology">People</a></li></ul></div><style type="text/css">ul.nav{flex-direction:row}@media(max-width: 567px){ul.nav{flex-direction:column}.TabbedNavigation li{max-width:100%}.TabbedNavigation li.active{background-color:var(--background-grey, #dddde2)}.TabbedNavigation li.active:before,.TabbedNavigation li.active:after{display:none}}</style></div></div></div><div class="container"><div class="row"><div class="col-xs-12"><div class="u-displayFlex"><div class="u-flexGrow1"><div class="works"><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_15570143" data-work_id="15570143" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/15570143/The_Geochemistry_and_Petrogenesis_of_the_Early_Proterozoic_Matachewan_Large_Igneous_Province">The Geochemistry and Petrogenesis of the Early Proterozoic Matachewan Large Igneous Province</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The Matachewan Large Igneous Province (LIP) is interpreted to have formed during mantle plume-induced continental break-up during the early Proterozoic. When the Matachewan LIP is reconstructed to its original configuration, the dyke... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_15570143" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The Matachewan Large Igneous Province (LIP) is interpreted to have formed during mantle plume-induced continental break-up during the early Proterozoic. When the Matachewan LIP is reconstructed to its original configuration, the dyke swarms,<br />layered intrusions and flood basalt provinces emplaced over the lifetime of the province comprise one of the largest magmatic provinces recognised in the geological record. New geochemical data allow, for the first time, the Matachewan<br />LIP to be treated as a single, coherent entity. The major and trace element data presented here show that Matachewan LIP suites share a common tholeiitic composition and trace element geochemistry characterised by enrichment in the most incompatible elements and depletion in the less incompatible elements. This signature, ubiquitous in early Proterozoic continental magmatic rocks, may indicate that the Matachewan LIP formed through contamination or mixing of its primary magmas with crustal material or that the early Proterozoic mantle had a fundamentally different composition to the modern mantle.<br /><br />Aside from the radiating geometry of the dyke swarms, a plume origin for the Matachewan LIP is implied by the geochemistry of some of the suites, used here to constrain the potential temperature of the magmatism. Comparison of these potential<br />temperatures with the temperature of the early Proterozoic upper mantle, shows that the province is the product of anomalously hot magmatism as predicted by mantle plume theory. Geochemical data from coeval intrusions suggest that the plume head was compositionally heterogeneous and sampled material from both depleted and enriched mantle. Sr-Nd-Pb isotopic data show that this source heterogeneity dictates the Ni-Cu-PGE potential of the related intrusions.<br /><br />The enormity of the Matachewan LIP cannot be overstated and its potential impact on the early Proterozoic global environment was likely immense – it may even have been the trigger to the irreversible oxygenation of our planet.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/15570143" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="4f938cfb044ac1e5a03ccd1c03dedf6f" rel="nofollow" data-download="{"attachment_id":38723639,"asset_id":15570143,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/38723639/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="360091" href="https://brighton.academia.edu/JakeCiborowski">Jake Ciborowski</a><script data-card-contents-for-user="360091" type="text/json">{"id":360091,"first_name":"Jake","last_name":"Ciborowski","domain_name":"brighton","page_name":"JakeCiborowski","display_name":"Jake Ciborowski","profile_url":"https://brighton.academia.edu/JakeCiborowski?f_ri=15989","photo":"https://0.academia-photos.com/360091/467541/11433010/s65_jake.ciborowski.jpg"}</script></span></span></li><li class="js-paper-rank-work_15570143 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="15570143"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 15570143, container: ".js-paper-rank-work_15570143", }); 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$(".js-view-count[data-work-id=15570143]").text(description); $(".js-view-count-work_15570143").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_15570143").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="15570143"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">2</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="45278" href="https://www.academia.edu/Documents/in/Large_Igneous_Provinces">Large Igneous Provinces</a><script data-card-contents-for-ri="45278" type="text/json">{"id":45278,"name":"Large Igneous Provinces","url":"https://www.academia.edu/Documents/in/Large_Igneous_Provinces?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=15570143]'), work: {"id":15570143,"title":"The Geochemistry and Petrogenesis of the Early Proterozoic Matachewan Large Igneous Province","created_at":"2015-09-10T02:40:31.982-07:00","url":"https://www.academia.edu/15570143/The_Geochemistry_and_Petrogenesis_of_the_Early_Proterozoic_Matachewan_Large_Igneous_Province?f_ri=15989","dom_id":"work_15570143","summary":"The Matachewan Large Igneous Province (LIP) is interpreted to have formed during mantle plume-induced continental break-up during the early Proterozoic. When the Matachewan LIP is reconstructed to its original configuration, the dyke swarms,\nlayered intrusions and flood basalt provinces emplaced over the lifetime of the province comprise one of the largest magmatic provinces recognised in the geological record. New geochemical data allow, for the first time, the Matachewan\nLIP to be treated as a single, coherent entity. The major and trace element data presented here show that Matachewan LIP suites share a common tholeiitic composition and trace element geochemistry characterised by enrichment in the most incompatible elements and depletion in the less incompatible elements. This signature, ubiquitous in early Proterozoic continental magmatic rocks, may indicate that the Matachewan LIP formed through contamination or mixing of its primary magmas with crustal material or that the early Proterozoic mantle had a fundamentally different composition to the modern mantle.\n\nAside from the radiating geometry of the dyke swarms, a plume origin for the Matachewan LIP is implied by the geochemistry of some of the suites, used here to constrain the potential temperature of the magmatism. Comparison of these potential\ntemperatures with the temperature of the early Proterozoic upper mantle, shows that the province is the product of anomalously hot magmatism as predicted by mantle plume theory. Geochemical data from coeval intrusions suggest that the plume head was compositionally heterogeneous and sampled material from both depleted and enriched mantle. Sr-Nd-Pb isotopic data show that this source heterogeneity dictates the Ni-Cu-PGE potential of the related intrusions.\n\nThe enormity of the Matachewan LIP cannot be overstated and its potential impact on the early Proterozoic global environment was likely immense – it may even have been the trigger to the irreversible oxygenation of our planet.","downloadable_attachments":[{"id":38723639,"asset_id":15570143,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":360091,"first_name":"Jake","last_name":"Ciborowski","domain_name":"brighton","page_name":"JakeCiborowski","display_name":"Jake Ciborowski","profile_url":"https://brighton.academia.edu/JakeCiborowski?f_ri=15989","photo":"https://0.academia-photos.com/360091/467541/11433010/s65_jake.ciborowski.jpg"}],"research_interests":[{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":45278,"name":"Large Igneous Provinces","url":"https://www.academia.edu/Documents/in/Large_Igneous_Provinces?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_48585407" data-work_id="48585407" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/48585407/Structure_and_dynamics_of_partially_solidified_systems">Structure and dynamics of partially solidified systems</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Snowflakes and silicate mushes are two examples of the terrestrial regimes that may be characterized as partially solidified systems. Change of phase in clouds and magma chambers as well as in the earth&#x27;s mantle and core introduces a... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_48585407" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Snowflakes and silicate mushes are two examples of the terrestrial regimes that may be characterized as partially solidified systems. Change of phase in clouds and magma chambers as well as in the earth&#x27;s mantle and core introduces a variety of phenomena to challenge both the mathematical modeler and the experimentalist intent upon understanding the nature of such processes. Paralleling the efforts of researchers in the natural sciences, metallurgists and materials scientists have extensively investigated solidification in alloy melts to discover the controlling mechanisms for undesirable behavior such as melt segregation, freckling (Figure 1), and crystal dislocation. Unfortunately, most of the studies, whether in the geosciences or in material sciences, have focused on highly specialized problems with little or no attempt at generalizing the results or methods to other physical systems. During May 12-16, 1986, at the Stanford University Conference Center at Fallen Leaf Lake, ...</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/48585407" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="af7cf54b433290dff665c8c78290fd17" rel="nofollow" data-download="{"attachment_id":67120735,"asset_id":48585407,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/67120735/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="36934545" href="https://llnl.academia.edu/CharlesCarrigan">Charles Carrigan</a><script data-card-contents-for-user="36934545" type="text/json">{"id":36934545,"first_name":"Charles","last_name":"Carrigan","domain_name":"llnl","page_name":"CharlesCarrigan","display_name":"Charles Carrigan","profile_url":"https://llnl.academia.edu/CharlesCarrigan?f_ri=15989","photo":"https://0.academia-photos.com/36934545/13713895/14838232/s65_charles.carrigan.jpg"}</script></span></span></li><li class="js-paper-rank-work_48585407 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="48585407"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 48585407, container: ".js-paper-rank-work_48585407", }); 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Change of phase in clouds and magma chambers as well as in the earth\u0026#x27;s mantle and core introduces a variety of phenomena to challenge both the mathematical modeler and the experimentalist intent upon understanding the nature of such processes. Paralleling the efforts of researchers in the natural sciences, metallurgists and materials scientists have extensively investigated solidification in alloy melts to discover the controlling mechanisms for undesirable behavior such as melt segregation, freckling (Figure 1), and crystal dislocation. Unfortunately, most of the studies, whether in the geosciences or in material sciences, have focused on highly specialized problems with little or no attempt at generalizing the results or methods to other physical systems. During May 12-16, 1986, at the Stanford University Conference Center at Fallen Leaf Lake, ...","downloadable_attachments":[{"id":67120735,"asset_id":48585407,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":36934545,"first_name":"Charles","last_name":"Carrigan","domain_name":"llnl","page_name":"CharlesCarrigan","display_name":"Charles Carrigan","profile_url":"https://llnl.academia.edu/CharlesCarrigan?f_ri=15989","photo":"https://0.academia-photos.com/36934545/13713895/14838232/s65_charles.carrigan.jpg"}],"research_interests":[{"id":414,"name":"Mineralogy","url":"https://www.academia.edu/Documents/in/Mineralogy?f_ri=15989","nofollow":false},{"id":511,"name":"Materials Science","url":"https://www.academia.edu/Documents/in/Materials_Science?f_ri=15989","nofollow":false},{"id":2404,"name":"Petrology","url":"https://www.academia.edu/Documents/in/Petrology?f_ri=15989","nofollow":false},{"id":4120,"name":"Crystal Growth","url":"https://www.academia.edu/Documents/in/Crystal_Growth?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989"},{"id":18987,"name":"Natural Science","url":"https://www.academia.edu/Documents/in/Natural_Science?f_ri=15989"},{"id":47879,"name":"National Science Foundation","url":"https://www.academia.edu/Documents/in/National_Science_Foundation?f_ri=15989"},{"id":152679,"name":"Dislocations","url":"https://www.academia.edu/Documents/in/Dislocations?f_ri=15989"},{"id":187673,"name":"Phase Change","url":"https://www.academia.edu/Documents/in/Phase_Change?f_ri=15989"},{"id":291387,"name":"Mathematical Model","url":"https://www.academia.edu/Documents/in/Mathematical_Model?f_ri=15989"},{"id":292596,"name":"North Atlantic Treaty Organization","url":"https://www.academia.edu/Documents/in/North_Atlantic_Treaty_Organization?f_ri=15989"},{"id":415322,"name":"Magma Chamber","url":"https://www.academia.edu/Documents/in/Magma_Chamber?f_ri=15989"},{"id":896204,"name":"Numerical Solution","url":"https://www.academia.edu/Documents/in/Numerical_Solution?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_22141739" data-work_id="22141739" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/22141739/New_software_models_thermodynamics_of_magmatic_systems">New software models thermodynamics of magmatic systems</a></div></div><div class="u-pb4x u-mt3x"></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" 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href="https://www.academia.edu/45078144/Vulkanologie">Vulkanologie</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Bardintzeff J.M. (1999) - Vulkanologie, traduction allemande par S. Lewerenz de "Volcanologie, Dunod, 1998" avec un chapitre supplémentaire sur le volcanisme allemand. Ferdinand Enke Verlag, Stuttgart, repris par Spektrum, Heidelberg, 280... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_45078144" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Bardintzeff J.M. (1999) - Vulkanologie, traduction allemande par S. Lewerenz de "Volcanologie, Dunod, 1998" avec un chapitre supplémentaire sur le volcanisme allemand. Ferdinand Enke Verlag, Stuttgart, repris par Spektrum, Heidelberg, 280 p. <br /> <br />German translation by S. 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(1999) - Vulkanologie, traduction allemande par S. Lewerenz de \"Volcanologie, Dunod, 1998\" avec un chapitre supplémentaire sur le volcanisme allemand. Ferdinand Enke Verlag, Stuttgart, repris par Spektrum, Heidelberg, 280 p.\r\n\r\nGerman translation by S. 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This paper was selected for... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_70110880" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Copyright 2009, Society of Petroleum Engineers This paper was prepared for presentation at the 2009 SPE/EAGE Reservoir Characterization and Simulation Conference held in Abu Dhabi, UAE, 1921 October 2009. 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Ratio","url":"https://www.academia.edu/Documents/in/Signal_to_Noise_Ratio?f_ri=15989"},{"id":1318481,"name":"Pilot project","url":"https://www.academia.edu/Documents/in/Pilot_project?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_4275829 coauthored" data-work_id="4275829" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/4275829/Thermal_and_compositional_evolution_of_the_shallow_magma_chambers_of_Vesuvius_Evidence_from_pyroxene_phenocrysts_and_melt_inclusions">Thermal and compositional evolution of the shallow magma chambers of Vesuvius: Evidence from pyroxene phenocrysts and melt inclusions</a></div></div><div class="u-pb4x u-mt3x"></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item 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$(".js-view-count[data-work-id=4275829]").text(description); $(".js-view-count-work_4275829").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_4275829").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="4275829"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">5</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="28235" href="https://www.academia.edu/Documents/in/Multidisciplinary">Multidisciplinary</a>, <script data-card-contents-for-ri="28235" type="text/json">{"id":28235,"name":"Multidisciplinary","url":"https://www.academia.edu/Documents/in/Multidisciplinary?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="411513" href="https://www.academia.edu/Documents/in/Geophysical">Geophysical</a>, <script data-card-contents-for-ri="411513" type="text/json">{"id":411513,"name":"Geophysical","url":"https://www.academia.edu/Documents/in/Geophysical?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="415322" href="https://www.academia.edu/Documents/in/Magma_Chamber">Magma Chamber</a><script data-card-contents-for-ri="415322" type="text/json">{"id":415322,"name":"Magma Chamber","url":"https://www.academia.edu/Documents/in/Magma_Chamber?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new 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Ratio","url":"https://www.academia.edu/Documents/in/Aspect_Ratio?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_2855235" data-work_id="2855235" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/2855235/The_granite_problem_as_exposed_in_the_southern_Snake_Range_Nevada">The granite problem as exposed in the southern Snake Range, Nevada</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">A geochemically and mineralogically diverse group of granitoids is present within an area of 900 km 2 in the southern Snake Range of eastern Nevada. The granitoids exposed range in age from Jurassic through Cretaceous to Oligocene and... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_2855235" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">A geochemically and mineralogically diverse group of granitoids is present within an area of 900 km 2 in the southern Snake Range of eastern Nevada. The granitoids exposed range in age from Jurassic through Cretaceous to Oligocene and include two calcic intrusions, two different types of two-mica granites, and aplites. The younger intrusions appear to have been emplaced at progressively more shallow depths.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/2855235" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="f495c2a285a37c6f2e5d37324624f344" rel="nofollow" data-download="{"attachment_id":30796307,"asset_id":2855235,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/30796307/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="76756" href="https://byu.academia.edu/EricChristiansen">Eric H Christiansen</a><script data-card-contents-for-user="76756" type="text/json">{"id":76756,"first_name":"Eric","last_name":"Christiansen","domain_name":"byu","page_name":"EricChristiansen","display_name":"Eric H Christiansen","profile_url":"https://byu.academia.edu/EricChristiansen?f_ri=15989","photo":"https://0.academia-photos.com/76756/84665/284057/s65_eric.christiansen.jpg"}</script></span></span></li><li class="js-paper-rank-work_2855235 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="2855235"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 2855235, container: ".js-paper-rank-work_2855235", }); 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$(".js-view-count[data-work-id=2855235]").text(description); $(".js-view-count-work_2855235").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_2855235").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="2855235"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">3</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="28331" href="https://www.academia.edu/Documents/in/Granite_Earth_Sciences_">Granite (Earth Sciences)</a><script data-card-contents-for-ri="28331" type="text/json">{"id":28331,"name":"Granite (Earth Sciences)","url":"https://www.academia.edu/Documents/in/Granite_Earth_Sciences_?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=2855235]'), work: {"id":2855235,"title":"The granite problem as exposed in the southern Snake Range, Nevada","created_at":"2013-03-03T19:43:39.238-08:00","url":"https://www.academia.edu/2855235/The_granite_problem_as_exposed_in_the_southern_Snake_Range_Nevada?f_ri=15989","dom_id":"work_2855235","summary":"A geochemically and mineralogically diverse group of granitoids is present within an area of 900 km 2 in the southern Snake Range of eastern Nevada. The granitoids exposed range in age from Jurassic through Cretaceous to Oligocene and include two calcic intrusions, two different types of two-mica granites, and aplites. The younger intrusions appear to have been emplaced at progressively more shallow depths.","downloadable_attachments":[{"id":30796307,"asset_id":2855235,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":76756,"first_name":"Eric","last_name":"Christiansen","domain_name":"byu","page_name":"EricChristiansen","display_name":"Eric H Christiansen","profile_url":"https://byu.academia.edu/EricChristiansen?f_ri=15989","photo":"https://0.academia-photos.com/76756/84665/284057/s65_eric.christiansen.jpg"}],"research_interests":[{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":28331,"name":"Granite (Earth Sciences)","url":"https://www.academia.edu/Documents/in/Granite_Earth_Sciences_?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_2855235" data-work_id="2855235" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/2855235/The_granite_problem_as_exposed_in_the_southern_Snake_Range_Nevada">The granite problem as exposed in the southern Snake Range, Nevada</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">A geochemically and mineralogically diverse group of granitoids is present within an area of 900 km 2 in the southern Snake Range of eastern Nevada. The granitoids exposed range in age from Jurassic through Cretaceous to Oligocene and... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_2855235" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">A geochemically and mineralogically diverse group of granitoids is present within an area of 900 km 2 in the southern Snake Range of eastern Nevada. The granitoids exposed range in age from Jurassic through Cretaceous to Oligocene and include two calcic intrusions, two different types of two-mica granites, and aplites. The younger intrusions appear to have been emplaced at progressively more shallow depths.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/2855235" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="c96f8e5f8545247a2e9a0d5ad6ceaa22" rel="nofollow" data-download="{"attachment_id":30796307,"asset_id":2855235,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/30796307/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="76756" href="https://byu.academia.edu/EricChristiansen">Eric H Christiansen</a><script data-card-contents-for-user="76756" type="text/json">{"id":76756,"first_name":"Eric","last_name":"Christiansen","domain_name":"byu","page_name":"EricChristiansen","display_name":"Eric H Christiansen","profile_url":"https://byu.academia.edu/EricChristiansen?f_ri=15989","photo":"https://0.academia-photos.com/76756/84665/284057/s65_eric.christiansen.jpg"}</script></span></span></li><li class="js-paper-rank-work_2855235 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="2855235"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 2855235, container: ".js-paper-rank-work_2855235", }); });</script></li><li class="js-percentile-work_2855235 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 2855235; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_2855235"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_2855235 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="2855235"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 2855235; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=2855235]").text(description); $(".js-view-count-work_2855235").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_2855235").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="2855235"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">3</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="28331" href="https://www.academia.edu/Documents/in/Granite_Earth_Sciences_">Granite (Earth Sciences)</a><script data-card-contents-for-ri="28331" type="text/json">{"id":28331,"name":"Granite (Earth Sciences)","url":"https://www.academia.edu/Documents/in/Granite_Earth_Sciences_?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=2855235]'), work: {"id":2855235,"title":"The granite problem as exposed in the southern Snake Range, Nevada","created_at":"2013-03-03T19:43:39.238-08:00","url":"https://www.academia.edu/2855235/The_granite_problem_as_exposed_in_the_southern_Snake_Range_Nevada?f_ri=15989","dom_id":"work_2855235","summary":"A geochemically and mineralogically diverse group of granitoids is present within an area of 900 km 2 in the southern Snake Range of eastern Nevada. The granitoids exposed range in age from Jurassic through Cretaceous to Oligocene and include two calcic intrusions, two different types of two-mica granites, and aplites. The younger intrusions appear to have been emplaced at progressively more shallow depths.","downloadable_attachments":[{"id":30796307,"asset_id":2855235,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":76756,"first_name":"Eric","last_name":"Christiansen","domain_name":"byu","page_name":"EricChristiansen","display_name":"Eric H Christiansen","profile_url":"https://byu.academia.edu/EricChristiansen?f_ri=15989","photo":"https://0.academia-photos.com/76756/84665/284057/s65_eric.christiansen.jpg"}],"research_interests":[{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":28331,"name":"Granite (Earth Sciences)","url":"https://www.academia.edu/Documents/in/Granite_Earth_Sciences_?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_40275963" data-work_id="40275963" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/40275963/Geological_Study_Of_Mahismal_Ghats_Of_Khultabad_Taluk_District_Aurangabad">Geological Study Of Mahismal Ghats Of Khultabad Taluk District Aurangabad</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The Deccan volcanic, representing basaltic flows of Cretaceous-Eocene age, are the most extensive geological formation of Peninsular India. They cover total area of 80% area of Maharashtra state. Keyword:Geological Study , amygdaloidal ,... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_40275963" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The Deccan volcanic, representing basaltic flows of Cretaceous-Eocene age, are the most extensive<br />geological formation of Peninsular India. They cover total area of 80% area of Maharashtra state.<br />Keyword:Geological Study , amygdaloidal , solidification , Soil texture.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/40275963" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="dcc3b3ec46288368b0e6645f06a27053" rel="nofollow" data-download="{"attachment_id":60513254,"asset_id":40275963,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/60513254/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="125133047" href="https://independent.academia.edu/AshokTejankar">Ashok Tejankar</a><script data-card-contents-for-user="125133047" type="text/json">{"id":125133047,"first_name":"Ashok","last_name":"Tejankar","domain_name":"independent","page_name":"AshokTejankar","display_name":"Ashok Tejankar","profile_url":"https://independent.academia.edu/AshokTejankar?f_ri=15989","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_40275963 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="40275963"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 40275963, container: ".js-paper-rank-work_40275963", }); });</script></li><li class="js-percentile-work_40275963 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 40275963; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_40275963"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_40275963 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="40275963"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 40275963; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=40275963]").text(description); $(".js-view-count-work_40275963").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_40275963").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="40275963"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i></div><span class="InlineList-item-text u-textTruncate u-pl6x"><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a><script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (false) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=40275963]'), work: {"id":40275963,"title":"Geological Study Of Mahismal Ghats Of Khultabad Taluk District Aurangabad","created_at":"2019-09-06T23:20:44.691-07:00","url":"https://www.academia.edu/40275963/Geological_Study_Of_Mahismal_Ghats_Of_Khultabad_Taluk_District_Aurangabad?f_ri=15989","dom_id":"work_40275963","summary":"The Deccan volcanic, representing basaltic flows of Cretaceous-Eocene age, are the most extensive\ngeological formation of Peninsular India. They cover total area of 80% area of Maharashtra state.\nKeyword:Geological Study , amygdaloidal , solidification , Soil texture.","downloadable_attachments":[{"id":60513254,"asset_id":40275963,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":125133047,"first_name":"Ashok","last_name":"Tejankar","domain_name":"independent","page_name":"AshokTejankar","display_name":"Ashok Tejankar","profile_url":"https://independent.academia.edu/AshokTejankar?f_ri=15989","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_9469671" data-work_id="9469671" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/9469671/A_Re_Evaluation_of_the_Volcanic_History_and_Mineral_Potential_of_the_Central_East_Tintic_Mountains_Utah">A Re-Evaluation of the Volcanic History and Mineral Potential of the Central East Tintic Mountains, Utah</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">This report documents several new findings concerning the geology and mineral potential of the central East Tintic Mountains, Utah. For example, fission-track ages and 40Ar/39Ar ages which we report suggest that some of the volcanism and... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_9469671" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">This report documents several new findings concerning the geology and mineral potential of the central East Tintic Mountains, Utah. For example, fission-track ages and 40Ar/39Ar ages which we report suggest that some of the <br />volcanism and alteration in this area is as old as 37.4 to 35.3 Ma. This early episode of volcanism was contemporaneous with lacustrine deposition; the overlying volcanic rocks and cross-cutting intrusions range in age from about 34.5 to 33.6 Ma. This implies that a large caldera related to the eruption of the younger Packard Quartz Latite and Fernow Quartz Latite is not present in this area . However, our data suggest that a smaller caldera related to the eruption of the tuff member of the Copperopolis Latite may be present. We note that many monzonite dikes and intrusions in this area are hornblende bearing and are correlative in modal and chemical composition with the productive Silver City Stock rather than the barren Sunrise Peak Stock. The large areas of hydrothermal alteration which surround these intrusions <br />exhibit many similarities to the well-studied alteration halos in the East Tintic District. The age, composition, and field relationships of the post-lacustrine volcanic rocks suggest that they may represent, in part, the extrusive equivalents of the monzonite dikes and Silver City Stock. Our work suggests that the Silver City Stock and related intrusions may be part of one of the youngest (33.6 ± 0.2 Ma) igneous events in the central East Tintic Mountains, but not as young as previously suggested (ca. 31.5 Ma). In addition, our recent work has documented the existence of unusually large (and abundant) magmatic sulfides in lava vitrophyres and vent-facies biotite latite dikes, which are the surface expressions of the Silver City Quartz Monzonite intrusions in this area. In addition, preliminary analytical data suggest that the sulfides host most (-75%) of the Ag present in the latites. The East Tintic Mountains are potentially the first locality, worldwide, where Ag in mesothermal veins can be demonstrated to be derived from degassed Ag-bearing magmatic sulfides. Consequently, the central East Tintic <br />Mountains are a favorable area for exploration for Ag (Pb-Zn-Cu-Au) ore bodies because: 1) productive monzonite intrusions are present, and 2) Paleozoic rocks favorable for ore deposition may be present beneath relatively thin volcanic cover because the area is not entirely enclosed within a caldera.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/9469671" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="821f910bcde7aa62f8dfb000681cd8e4" rel="nofollow" data-download="{"attachment_id":35704060,"asset_id":9469671,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/35704060/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="1260193" href="https://byu.academia.edu/BartKowallis">Bart Kowallis</a><script data-card-contents-for-user="1260193" type="text/json">{"id":1260193,"first_name":"Bart","last_name":"Kowallis","domain_name":"byu","page_name":"BartKowallis","display_name":"Bart Kowallis","profile_url":"https://byu.academia.edu/BartKowallis?f_ri=15989","photo":"https://0.academia-photos.com/1260193/461177/11953429/s65_bart.kowallis.jpg"}</script></span></span></li><li class="js-paper-rank-work_9469671 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="9469671"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 9469671, container: ".js-paper-rank-work_9469671", }); 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$(".js-view-count[data-work-id=9469671]").text(description); $(".js-view-count-work_9469671").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_9469671").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="9469671"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">6</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="2406" href="https://www.academia.edu/Documents/in/Economic_Geology">Economic Geology</a>, <script data-card-contents-for-ri="2406" type="text/json">{"id":2406,"name":"Economic Geology","url":"https://www.academia.edu/Documents/in/Economic_Geology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="14228" href="https://www.academia.edu/Documents/in/Geochronology">Geochronology</a>, <script data-card-contents-for-ri="14228" type="text/json">{"id":14228,"name":"Geochronology","url":"https://www.academia.edu/Documents/in/Geochronology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="18496" href="https://www.academia.edu/Documents/in/Mining">Mining</a><script data-card-contents-for-ri="18496" type="text/json">{"id":18496,"name":"Mining","url":"https://www.academia.edu/Documents/in/Mining?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=9469671]'), work: {"id":9469671,"title":"A Re-Evaluation of the Volcanic History and Mineral Potential of the Central East Tintic Mountains, Utah","created_at":"2014-11-23T23:43:00.004-08:00","url":"https://www.academia.edu/9469671/A_Re_Evaluation_of_the_Volcanic_History_and_Mineral_Potential_of_the_Central_East_Tintic_Mountains_Utah?f_ri=15989","dom_id":"work_9469671","summary":"This report documents several new findings concerning the geology and mineral potential of the central East Tintic Mountains, Utah. For example, fission-track ages and 40Ar/39Ar ages which we report suggest that some of the\r\nvolcanism and alteration in this area is as old as 37.4 to 35.3 Ma. This early episode of volcanism was contemporaneous with lacustrine deposition; the overlying volcanic rocks and cross-cutting intrusions range in age from about 34.5 to 33.6 Ma. This implies that a large caldera related to the eruption of the younger Packard Quartz Latite and Fernow Quartz Latite is not present in this area . However, our data suggest that a smaller caldera related to the eruption of the tuff member of the Copperopolis Latite may be present. We note that many monzonite dikes and intrusions in this area are hornblende bearing and are correlative in modal and chemical composition with the productive Silver City Stock rather than the barren Sunrise Peak Stock. The large areas of hydrothermal alteration which surround these intrusions\r\nexhibit many similarities to the well-studied alteration halos in the East Tintic District. The age, composition, and field relationships of the post-lacustrine volcanic rocks suggest that they may represent, in part, the extrusive equivalents of the monzonite dikes and Silver City Stock. Our work suggests that the Silver City Stock and related intrusions may be part of one of the youngest (33.6 ± 0.2 Ma) igneous events in the central East Tintic Mountains, but not as young as previously suggested (ca. 31.5 Ma). In addition, our recent work has documented the existence of unusually large (and abundant) magmatic sulfides in lava vitrophyres and vent-facies biotite latite dikes, which are the surface expressions of the Silver City Quartz Monzonite intrusions in this area. In addition, preliminary analytical data suggest that the sulfides host most (-75%) of the Ag present in the latites. The East Tintic Mountains are potentially the first locality, worldwide, where Ag in mesothermal veins can be demonstrated to be derived from degassed Ag-bearing magmatic sulfides. Consequently, the central East Tintic\r\nMountains are a favorable area for exploration for Ag (Pb-Zn-Cu-Au) ore bodies because: 1) productive monzonite intrusions are present, and 2) Paleozoic rocks favorable for ore deposition may be present beneath relatively thin volcanic cover because the area is not entirely enclosed within a caldera. ","downloadable_attachments":[{"id":35704060,"asset_id":9469671,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":1260193,"first_name":"Bart","last_name":"Kowallis","domain_name":"byu","page_name":"BartKowallis","display_name":"Bart Kowallis","profile_url":"https://byu.academia.edu/BartKowallis?f_ri=15989","photo":"https://0.academia-photos.com/1260193/461177/11953429/s65_bart.kowallis.jpg"}],"research_interests":[{"id":2406,"name":"Economic Geology","url":"https://www.academia.edu/Documents/in/Economic_Geology?f_ri=15989","nofollow":false},{"id":14228,"name":"Geochronology","url":"https://www.academia.edu/Documents/in/Geochronology?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":18496,"name":"Mining","url":"https://www.academia.edu/Documents/in/Mining?f_ri=15989","nofollow":false},{"id":46378,"name":"Ore Geology","url":"https://www.academia.edu/Documents/in/Ore_Geology?f_ri=15989"},{"id":341587,"name":"Utah Geology","url":"https://www.academia.edu/Documents/in/Utah_Geology?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_4474246" data-work_id="4474246" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/4474246/Geochemical_and_isotopic_zoning_patterns_of_plagioclase_megacrysts_in_gabbroic_dykes_from_the_Gardar_Province_South_Greenland_implications_for_crystallisation_processes_in_anorthositic_magmas">Geochemical and isotopic zoning patterns of plagioclase megacrysts in gabbroic dykes from the Gardar Province, South Greenland: implications for crystallisation processes in anorthositic magmas</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Chemical and Sr isotopic zoning patterns in plagioclase megacrysts from gabbroic dykes in the Gardar Province can be used to elucidate magma-chamber and emplacement processes. The megacrysts occur either as single crystals or assembled as... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_4474246" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Chemical and Sr isotopic zoning patterns in plagioclase megacrysts from gabbroic dykes in the Gardar Province can be used to elucidate magma-chamber and emplacement processes. The megacrysts occur either as single crystals or assembled as anorthosite xenoliths. The size of the megacrysts varies from <1 cm to 1 m. They consist of a large core with variable zonation (An58–39) and a relatively small (<600 µm), normally zoned rim (An62–27). The contact between core and rim is sharp and marked by a sharp increase in anorthite content which can reach 11 mol% An. This gap is interpreted as having formed during dyke emplacement due to a sudden pressure release. Some of the megacryst cores show a fairly constant composition whereas others exhibit an unusual wavy-oscillatory zoning which has not been reported elsewhere to our knowledge. The oscillatory zoning has wavelengths of up to 2,500 µm and a maximum amplitude of 7 mol% An. It is interpreted as reflecting movements of the crystals in the magma reservoir. The Sr isotopic composition of one crystal shows a radiogenic inner core ((87Sr/86Sr)i=0.7044) and a less radiogenic outer core ((87Sr/86Sr)i=0.7039–0.7036). The lack of a significant change between outer core and rim ((87Sr/86Sr)i=0.7037) is consistent with formation of the more An-rich rim due to pressure release. Variations in the core may be related to movements of the crystal and/or magma mixing. A trace-element profile across a megacryst shows a small increase in Sr and small decreases in Ba and La contents of the recalculated melt composition across the core-rim boundary, whereas P, Ce, Nd and Eu remain constant. Melt compositional changes upon emplacement are therefore considered to be of minor importance. Constant ratios of incompatible trace elements in the megacryst cores indicate a dominant influence of a lower crustal source on trace-element budgets.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/4474246" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="4eda43765a82bde34bd3881be69b73e8" rel="nofollow" data-download="{"attachment_id":38081769,"asset_id":4474246,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/38081769/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="5530086" href="https://uni-halle.academia.edu/RalfHalama">Ralf Halama</a><script data-card-contents-for-user="5530086" type="text/json">{"id":5530086,"first_name":"Ralf","last_name":"Halama","domain_name":"uni-halle","page_name":"RalfHalama","display_name":"Ralf Halama","profile_url":"https://uni-halle.academia.edu/RalfHalama?f_ri=15989","photo":"https://0.academia-photos.com/5530086/2424003/124056732/s65_ralf.halama.jpg"}</script></span></span></li><li class="js-paper-rank-work_4474246 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="4474246"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 4474246, container: ".js-paper-rank-work_4474246", }); });</script></li><li class="js-percentile-work_4474246 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 4474246; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_4474246"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_4474246 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="4474246"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 4474246; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=4474246]").text(description); $(".js-view-count-work_4474246").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_4474246").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="4474246"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i></div><span class="InlineList-item-text u-textTruncate u-pl6x"><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a><script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (false) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=4474246]'), work: {"id":4474246,"title":"Geochemical and isotopic zoning patterns of plagioclase megacrysts in gabbroic dykes from the Gardar Province, South Greenland: implications for crystallisation processes in anorthositic magmas","created_at":"2013-09-12T19:00:10.614-07:00","url":"https://www.academia.edu/4474246/Geochemical_and_isotopic_zoning_patterns_of_plagioclase_megacrysts_in_gabbroic_dykes_from_the_Gardar_Province_South_Greenland_implications_for_crystallisation_processes_in_anorthositic_magmas?f_ri=15989","dom_id":"work_4474246","summary":"Chemical and Sr isotopic zoning patterns in plagioclase megacrysts from gabbroic dykes in the Gardar Province can be used to elucidate magma-chamber and emplacement processes. The megacrysts occur either as single crystals or assembled as anorthosite xenoliths. The size of the megacrysts varies from \u003c1 cm to 1 m. They consist of a large core with variable zonation (An58–39) and a relatively small (\u003c600 µm), normally zoned rim (An62–27). The contact between core and rim is sharp and marked by a sharp increase in anorthite content which can reach 11 mol% An. This gap is interpreted as having formed during dyke emplacement due to a sudden pressure release. Some of the megacryst cores show a fairly constant composition whereas others exhibit an unusual wavy-oscillatory zoning which has not been reported elsewhere to our knowledge. The oscillatory zoning has wavelengths of up to 2,500 µm and a maximum amplitude of 7 mol% An. It is interpreted as reflecting movements of the crystals in the magma reservoir. The Sr isotopic composition of one crystal shows a radiogenic inner core ((87Sr/86Sr)i=0.7044) and a less radiogenic outer core ((87Sr/86Sr)i=0.7039–0.7036). The lack of a significant change between outer core and rim ((87Sr/86Sr)i=0.7037) is consistent with formation of the more An-rich rim due to pressure release. Variations in the core may be related to movements of the crystal and/or magma mixing. A trace-element profile across a megacryst shows a small increase in Sr and small decreases in Ba and La contents of the recalculated melt composition across the core-rim boundary, whereas P, Ce, Nd and Eu remain constant. Melt compositional changes upon emplacement are therefore considered to be of minor importance. Constant ratios of incompatible trace elements in the megacryst cores indicate a dominant influence of a lower crustal source on trace-element budgets.","downloadable_attachments":[{"id":38081769,"asset_id":4474246,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":5530086,"first_name":"Ralf","last_name":"Halama","domain_name":"uni-halle","page_name":"RalfHalama","display_name":"Ralf Halama","profile_url":"https://uni-halle.academia.edu/RalfHalama?f_ri=15989","photo":"https://0.academia-photos.com/5530086/2424003/124056732/s65_ralf.halama.jpg"}],"research_interests":[{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_2855229" data-work_id="2855229" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/2855229/The_petrogenesis_of_topaz_rhyolites_from_the_western_United_States">The petrogenesis of topaz rhyolites from the western United States</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">High-silica topaz-bearing rhyolites of Cenozoic age are widely distributed across the western USA and Mexico. They are characteristically enriched in fluorine (> 0.2 wt.%) and incompatible lithophile elements (eg Li, Rb, Cs, U, Th, Be).... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_2855229" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">High-silica topaz-bearing rhyolites of Cenozoic age are widely distributed across the western USA and Mexico. They are characteristically enriched in fluorine (> 0.2 wt.%) and incompatible lithophile elements (eg Li, Rb, Cs, U, Th, Be). In addition to topaz, the rhyolites contain garnet, bixbyite, pseudobrookite, hematite and fluorite in cavities or in their devitrified groundmasses. Magmatic phases include sanidine, quartz, oligoclase and Fe-rich biotite.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/2855229" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="44672dcd82016b6384260135edcdf3a7" rel="nofollow" data-download="{"attachment_id":30796313,"asset_id":2855229,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/30796313/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="76756" href="https://byu.academia.edu/EricChristiansen">Eric H Christiansen</a><script data-card-contents-for-user="76756" type="text/json">{"id":76756,"first_name":"Eric","last_name":"Christiansen","domain_name":"byu","page_name":"EricChristiansen","display_name":"Eric H Christiansen","profile_url":"https://byu.academia.edu/EricChristiansen?f_ri=15989","photo":"https://0.academia-photos.com/76756/84665/284057/s65_eric.christiansen.jpg"}</script></span></span></li><li class="js-paper-rank-work_2855229 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="2855229"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 2855229, container: ".js-paper-rank-work_2855229", }); 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$(".js-view-count[data-work-id=2855229]").text(description); $(".js-view-count-work_2855229").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_2855229").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="2855229"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">2</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="1370" href="https://www.academia.edu/Documents/in/Volcanology">Volcanology</a>, <script data-card-contents-for-ri="1370" type="text/json">{"id":1370,"name":"Volcanology","url":"https://www.academia.edu/Documents/in/Volcanology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a><script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=2855229]'), work: {"id":2855229,"title":"The petrogenesis of topaz rhyolites from the western United States","created_at":"2013-03-03T19:43:39.170-08:00","url":"https://www.academia.edu/2855229/The_petrogenesis_of_topaz_rhyolites_from_the_western_United_States?f_ri=15989","dom_id":"work_2855229","summary":"High-silica topaz-bearing rhyolites of Cenozoic age are widely distributed across the western USA and Mexico. They are characteristically enriched in fluorine (\u003e 0.2 wt.%) and incompatible lithophile elements (eg Li, Rb, Cs, U, Th, Be). In addition to topaz, the rhyolites contain garnet, bixbyite, pseudobrookite, hematite and fluorite in cavities or in their devitrified groundmasses. 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$(".js-view-count[data-work-id=3707406]").text(description); $(".js-view-count-work_3707406").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_3707406").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="3707406"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">2</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="407" href="https://www.academia.edu/Documents/in/Geochemistry">Geochemistry</a>, <script data-card-contents-for-ri="407" type="text/json">{"id":407,"name":"Geochemistry","url":"https://www.academia.edu/Documents/in/Geochemistry?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a><script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=3707406]'), work: {"id":3707406,"title":"Crustal Differentiation Processes at Krakatau Volcano, Indonesia","created_at":"2013-06-13T22:31:16.074-07:00","url":"https://www.academia.edu/3707406/Crustal_Differentiation_Processes_at_Krakatau_Volcano_Indonesia?f_ri=15989","dom_id":"work_3707406","summary":null,"downloadable_attachments":[{"id":31390356,"asset_id":3707406,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":103569,"first_name":"Valentin","last_name":"Troll","domain_name":"uppsala","page_name":"ValentinTroll","display_name":"Valentin Troll","profile_url":"https://uppsala.academia.edu/ValentinTroll?f_ri=15989","photo":"https://0.academia-photos.com/103569/692432/859556/s65_valentin.troll.jpg"}],"research_interests":[{"id":407,"name":"Geochemistry","url":"https://www.academia.edu/Documents/in/Geochemistry?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_44964641" data-work_id="44964641" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/44964641/Volcanologie_6e_edition">Volcanologie, 6e edition</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Jacques-Marie Bardintzeff (2021) « Volcanologie », 6ème édition, Dunod VOLCANOLOGIE, 6th edition, DUNOD, 2021, by Jacques-Marie BARDINTZEFF (<a href="mailto:jacques-marie.bardintzeff@universite_paris-saclay.fr" rel="nofollow">jacques-marie.bardintzeff@universite_paris-saclay.fr</a>). This sixth edition, in French, is... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_44964641" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Jacques-Marie Bardintzeff (2021) <br />« Volcanologie », 6ème édition, Dunod <br /> <br />VOLCANOLOGIE, 6th edition, DUNOD, 2021, by Jacques-Marie BARDINTZEFF (<a href="mailto:jacques-marie.bardintzeff@universite_paris-saclay.fr" rel="nofollow">jacques-marie.bardintzeff@universite_paris-saclay.fr</a>). <br />This sixth edition, in French, is augmented and improved : 352 pages, 160 black and white photos, figures and tables, plus 16 extra pages of new colour photos, 650 references (numerous recent), web sites, glossary. <br />Chapters and paragraphs concerning supereruptions, planetary volcanoes, risks and mitigating, volcano and climate, are particularly rewritten and actualized. The price is 36 euros. <br />For more information, please contact: DUNOD, 11 rue Paul Bert CS 30024, 92247 Malakoff Cedex, France, phone: 33 1 41 23 66 00 <br />ISBN 978-2-10-081914-0 <br />1ère éd., Masson, 1991; 2e éd., Dunod, 1998, 3e éd., 2006, 4e éd., 2011, 5e éd., 2016; traduit en allemand, 1999; traduit et adapté en anglais / américain avec A.R. McBirney, 2000) <br /> <br /> <br /><a href="https://www.dunod.com/livres-jacques-marie-bardintzeff" rel="nofollow">https://www.dunod.com/livres-jacques-marie-bardintzeff</a> <br /> <br /><a href="https://www.dunod.com/livres-jacques-marie-bardintzeff" rel="nofollow">https://www.dunod.com/livres-jacques-marie-bardintzeff</a> <br /> <br /><a href="https://www.dunod.com/sciences-techniques/volcanologie-2" rel="nofollow">https://www.dunod.com/sciences-techniques/volcanologie-2</a> <br /> <br /> <br />La sixième édition de « Volcanologie » par Jacques-Marie Bardintzeff (<a href="mailto:jacques-marie.bardintzeff@universite-paris-saclay.fr" rel="nofollow">jacques-marie.bardintzeff@universite-paris-saclay.fr</a>) vient de paraître aux éditions Dunod. Cette nouvelle version est singulièrement augmentée et complétée : 352 pages, 160 photos, schémas et tableaux, 16 pages couleur hors texte. <br />Les chapitres et paragraphes consacrés aux super-éruptions, au volcanisme planétaire, aux risques et leurs prévisions, aux relations entre volcans et climats à l’échelle de la planète sont particulièrement remaniés et actualisés. 650 références bibliographiques (nombreuses récentes), un glossaire ainsi que des adresses de sites web sont annexés. Le prix de l'ouvrage est de 36 euros. <br />Pour les étudiants de Licence, de Master, des « prépas » Capes et Agrégation et tous les passionnés et curieux de volcans. <br />DUNOD, 11 rue Paul Bert CS 30024, 92247 Malakoff Cedex, 01 41 23 66 00 <br />ISBN 978-2-10-081914-0 <br /> <br /><a href="https://www.dunod.com/livres-jacques-marie-bardintzeff" rel="nofollow">https://www.dunod.com/livres-jacques-marie-bardintzeff</a> <br /> <br /><a href="https://www.dunod.com/sciences-techniques/volcanologie-2" rel="nofollow">https://www.dunod.com/sciences-techniques/volcanologie-2</a></div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/44964641" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="97f0f941be48724066ff9e7684e678d2" rel="nofollow" data-download="{"attachment_id":65498540,"asset_id":44964641,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/65498540/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="32827601" href="https://universite-paris-saclay.academia.edu/JacquesMarieBardintzeff">Jacques-Marie Bardintzeff</a><script data-card-contents-for-user="32827601" type="text/json">{"id":32827601,"first_name":"Jacques-Marie","last_name":"Bardintzeff","domain_name":"universite-paris-saclay","page_name":"JacquesMarieBardintzeff","display_name":"Jacques-Marie Bardintzeff","profile_url":"https://universite-paris-saclay.academia.edu/JacquesMarieBardintzeff?f_ri=15989","photo":"https://0.academia-photos.com/32827601/15367207/16009061/s65_jacques-marie.bardintzeff.jpg"}</script></span></span></li><li class="js-paper-rank-work_44964641 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="44964641"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 44964641, container: ".js-paper-rank-work_44964641", }); 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$(".js-view-count[data-work-id=44964641]").text(description); $(".js-view-count-work_44964641").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_44964641").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="44964641"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">7</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="1370" href="https://www.academia.edu/Documents/in/Volcanology">Volcanology</a>, <script data-card-contents-for-ri="1370" type="text/json">{"id":1370,"name":"Volcanology","url":"https://www.academia.edu/Documents/in/Volcanology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="8618" href="https://www.academia.edu/Documents/in/Natural_Hazards">Natural Hazards</a>, <script data-card-contents-for-ri="8618" type="text/json">{"id":8618,"name":"Natural Hazards","url":"https://www.academia.edu/Documents/in/Natural_Hazards?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="16937" href="https://www.academia.edu/Documents/in/Petrology_and_Geochemistry">Petrology and Geochemistry</a><script data-card-contents-for-ri="16937" type="text/json">{"id":16937,"name":"Petrology and Geochemistry","url":"https://www.academia.edu/Documents/in/Petrology_and_Geochemistry?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=44964641]'), work: {"id":44964641,"title":"Volcanologie, 6e edition","created_at":"2021-01-24T02:23:42.095-08:00","url":"https://www.academia.edu/44964641/Volcanologie_6e_edition?f_ri=15989","dom_id":"work_44964641","summary":"Jacques-Marie Bardintzeff (2021)\r\n« Volcanologie », 6ème édition, Dunod\r\n\r\nVOLCANOLOGIE, 6th edition, DUNOD, 2021, by Jacques-Marie BARDINTZEFF (jacques-marie.bardintzeff@universite_paris-saclay.fr).\r\nThis sixth edition, in French, is augmented and improved : 352 pages, 160 black and white photos, figures and tables, plus 16 extra pages of new colour photos, 650 references (numerous recent), web sites, glossary. \r\nChapters and paragraphs concerning supereruptions, planetary volcanoes, risks and mitigating, volcano and climate, are particularly rewritten and actualized. The price is 36 euros.\r\nFor more information, please contact: DUNOD, 11 rue Paul Bert CS 30024, 92247 Malakoff Cedex, France, phone: 33 1 41 23 66 00\r\nISBN 978-2-10-081914-0\r\n1ère éd., Masson, 1991; 2e éd., Dunod, 1998, 3e éd., 2006, 4e éd., 2011, 5e éd., 2016; traduit en allemand, 1999; traduit et adapté en anglais / américain avec A.R. McBirney, 2000)\r\n\r\n\r\nhttps://www.dunod.com/livres-jacques-marie-bardintzeff\r\n\r\nhttps://www.dunod.com/livres-jacques-marie-bardintzeff\r\n\r\nhttps://www.dunod.com/sciences-techniques/volcanologie-2\r\n\r\n\r\nLa sixième édition de « Volcanologie » par Jacques-Marie Bardintzeff (jacques-marie.bardintzeff@universite-paris-saclay.fr) vient de paraître aux éditions Dunod. Cette nouvelle version est singulièrement augmentée et complétée : 352 pages, 160 photos, schémas et tableaux, 16 pages couleur hors texte.\r\nLes chapitres et paragraphes consacrés aux super-éruptions, au volcanisme planétaire, aux risques et leurs prévisions, aux relations entre volcans et climats à l’échelle de la planète sont particulièrement remaniés et actualisés. 650 références bibliographiques (nombreuses récentes), un glossaire ainsi que des adresses de sites web sont annexés. Le prix de l'ouvrage est de 36 euros.\r\nPour les étudiants de Licence, de Master, des « prépas » Capes et Agrégation et tous les passionnés et curieux de volcans.\r\nDUNOD, 11 rue Paul Bert CS 30024, 92247 Malakoff Cedex, 01 41 23 66 00\r\nISBN 978-2-10-081914-0\r\n\r\nhttps://www.dunod.com/livres-jacques-marie-bardintzeff\r\n\r\nhttps://www.dunod.com/sciences-techniques/volcanologie-2\r\n","downloadable_attachments":[{"id":65498540,"asset_id":44964641,"asset_type":"Work","always_allow_download":false},{"id":65498465,"asset_id":44964641,"asset_type":"Work","always_allow_download":false},{"id":65498356,"asset_id":44964641,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":32827601,"first_name":"Jacques-Marie","last_name":"Bardintzeff","domain_name":"universite-paris-saclay","page_name":"JacquesMarieBardintzeff","display_name":"Jacques-Marie Bardintzeff","profile_url":"https://universite-paris-saclay.academia.edu/JacquesMarieBardintzeff?f_ri=15989","photo":"https://0.academia-photos.com/32827601/15367207/16009061/s65_jacques-marie.bardintzeff.jpg"}],"research_interests":[{"id":1370,"name":"Volcanology","url":"https://www.academia.edu/Documents/in/Volcanology?f_ri=15989","nofollow":false},{"id":8618,"name":"Natural Hazards","url":"https://www.academia.edu/Documents/in/Natural_Hazards?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":16937,"name":"Petrology and Geochemistry","url":"https://www.academia.edu/Documents/in/Petrology_and_Geochemistry?f_ri=15989","nofollow":false},{"id":67273,"name":"Physical Volcanology","url":"https://www.academia.edu/Documents/in/Physical_Volcanology?f_ri=15989"},{"id":102861,"name":"Volcanoes","url":"https://www.academia.edu/Documents/in/Volcanoes?f_ri=15989"},{"id":153149,"name":"Volcanic hazards","url":"https://www.academia.edu/Documents/in/Volcanic_hazards?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_12878509 coauthored" data-work_id="12878509" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/12878509/Origin_of_analcimes_in_the_Tertiary_volcanic_rocks_from_the_Eastern_Pontides_NE_Turkey_a_textural_mineralogical_and_geochemical_approach">Origin of analcimes in the Tertiary volcanic rocks from the Eastern Pontides (NE Turkey): a textural, mineralogical and geochemical approach</a></div></div><div class="u-pb4x u-mt3x"></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/12878509" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="bdfc99e237a7131d142334977889b59b" rel="nofollow" data-download="{"attachment_id":37862170,"asset_id":12878509,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/37862170/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="9350135" href="https://ktu.academia.edu/mehmetArslan">Mehmet ARSLAN</a><script data-card-contents-for-user="9350135" type="text/json">{"id":9350135,"first_name":"Mehmet","last_name":"ARSLAN","domain_name":"ktu","page_name":"mehmetArslan","display_name":"Mehmet ARSLAN","profile_url":"https://ktu.academia.edu/mehmetArslan?f_ri=15989","photo":"https://0.academia-photos.com/9350135/9539676/10627215/s65_mehmet.arslan.jpg"}</script></span></span><span class="u-displayInlineBlock InlineList-item-text"> and <span class="u-textDecorationUnderline u-clickable InlineList-item-text js-work-more-authors-12878509">+1</span><div class="hidden js-additional-users-12878509"><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://independent.academia.edu/Uzmdr%C4%B0rfanTem%C4%B0zel">Assoc. Prof. İrfan Temİzel</a></span></div></div></span><script>(function(){ var popoverSettings = { el: $('.js-work-more-authors-12878509'), placement: 'bottom', hide_delay: 200, html: true, content: function(){ return $('.js-additional-users-12878509').html(); } } new HoverPopover(popoverSettings); })();</script></li><li class="js-paper-rank-work_12878509 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="12878509"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 12878509, container: ".js-paper-rank-work_12878509", }); });</script></li><li class="js-percentile-work_12878509 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 12878509; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_12878509"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_12878509 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="12878509"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 12878509; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=12878509]").text(description); $(".js-view-count-work_12878509").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_12878509").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="12878509"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i></div><span class="InlineList-item-text u-textTruncate u-pl6x"><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a><script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (false) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=12878509]'), work: {"id":12878509,"title":"Origin of analcimes in the Tertiary volcanic rocks from the Eastern Pontides (NE Turkey): a textural, mineralogical and geochemical approach","created_at":"2015-06-09T00:00:06.324-07:00","url":"https://www.academia.edu/12878509/Origin_of_analcimes_in_the_Tertiary_volcanic_rocks_from_the_Eastern_Pontides_NE_Turkey_a_textural_mineralogical_and_geochemical_approach?f_ri=15989","dom_id":"work_12878509","summary":null,"downloadable_attachments":[{"id":37862170,"asset_id":12878509,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":9350135,"first_name":"Mehmet","last_name":"ARSLAN","domain_name":"ktu","page_name":"mehmetArslan","display_name":"Mehmet ARSLAN","profile_url":"https://ktu.academia.edu/mehmetArslan?f_ri=15989","photo":"https://0.academia-photos.com/9350135/9539676/10627215/s65_mehmet.arslan.jpg"},{"id":32087728,"first_name":"Assoc. Prof. İrfan","last_name":"Temİzel","domain_name":"independent","page_name":"UzmdrİrfanTemİzel","display_name":"Assoc. Prof. İrfan Temİzel","profile_url":"https://independent.academia.edu/Uzmdr%C4%B0rfanTem%C4%B0zel?f_ri=15989","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_26784435 coauthored" data-work_id="26784435" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/26784435/Volcano_tectonics_of_the_Al_Haruj_Volcanic_Province_Central_Libya">Volcano-tectonics of the Al Haruj Volcanic Province, Central Libya</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The Al Haruj intra-continental Volcanic Province (AHVP), located at the southwestern margin of the Sirt Basin, hosts the most extensive and recent volcanic activity in Libya-which is considered typical for plate interiors. From north to... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_26784435" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The Al Haruj intra-continental Volcanic Province (AHVP), located at the southwestern margin of the Sirt Basin, hosts the most extensive and recent volcanic activity in Libya-which is considered typical for plate interiors. From north to south the AHVP is divided into two subprovinces, namely Al Haruj al Aswad and Al Haruj al Abiyad. The total area of the AHVP is around 42,000km 2. Despite the great size of the AHVP, its volcano-tectonic evolution and activity have received very little attention and are poorly documented and understood. Here we present new field data, and analytical and numerical results, on the volcano-tectonics of the AHVP. The length/thickness ratio of 47 dykes and volcanic fissures were measured to estimate magmatic overpressure at the time of eruption. The average dyke (length/thickness) ratio of 421 indicates magmatic overpressures during the associate fissure eruptions of 8-19MPa (depending on host-rock elastic properties). Spatial distributions of 432 monogenetic eruptions sites/points (lava shields, pyroclastic cones) in the AHVP reveal two main clusters, one in the south and another in the north. Aligned eruptive vents show the dominating strike of volcanic fissures/feeder-dykes as WNW-ESE to NW-SE, coinciding with the orientation of one of main fracture/fault zones. Numerical modelling and field 2 observations suggest that some feeder-dykes may have used steeply dipping normal-fault zones as part of their paths to the surface.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/26784435" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="5c38d6184fe000f5f7b07d6c40675b34" rel="nofollow" data-download="{"attachment_id":47060236,"asset_id":26784435,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/47060236/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="468989" href="https://royalholloway.academia.edu/AgustGudmundsson">Agust Gudmundsson</a><script data-card-contents-for-user="468989" type="text/json">{"id":468989,"first_name":"Agust","last_name":"Gudmundsson","domain_name":"royalholloway","page_name":"AgustGudmundsson","display_name":"Agust Gudmundsson","profile_url":"https://royalholloway.academia.edu/AgustGudmundsson?f_ri=15989","photo":"https://0.academia-photos.com/468989/156149/276788/s65_agust.gudmundsson.jpg"}</script></span></span><span class="u-displayInlineBlock InlineList-item-text"> and <span class="u-textDecorationUnderline u-clickable InlineList-item-text js-work-more-authors-26784435">+1</span><div class="hidden js-additional-users-26784435"><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://royalholloway.academia.edu/AbdelsalamElshaafi">Abdelsalam Elshaafi</a></span></div></div></span><script>(function(){ var popoverSettings = { el: $('.js-work-more-authors-26784435'), placement: 'bottom', hide_delay: 200, html: true, content: function(){ return $('.js-additional-users-26784435').html(); } } new HoverPopover(popoverSettings); })();</script></li><li class="js-paper-rank-work_26784435 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="26784435"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 26784435, container: ".js-paper-rank-work_26784435", }); });</script></li><li class="js-percentile-work_26784435 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 26784435; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_26784435"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_26784435 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="26784435"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 26784435; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=26784435]").text(description); $(".js-view-count-work_26784435").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_26784435").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="26784435"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">9</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="1252" href="https://www.academia.edu/Documents/in/Remote_Sensing">Remote Sensing</a>, <script data-card-contents-for-ri="1252" type="text/json">{"id":1252,"name":"Remote Sensing","url":"https://www.academia.edu/Documents/in/Remote_Sensing?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="1370" href="https://www.academia.edu/Documents/in/Volcanology">Volcanology</a>, <script data-card-contents-for-ri="1370" type="text/json">{"id":1370,"name":"Volcanology","url":"https://www.academia.edu/Documents/in/Volcanology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="1419" href="https://www.academia.edu/Documents/in/Structural_Geology">Structural Geology</a>, <script data-card-contents-for-ri="1419" type="text/json">{"id":1419,"name":"Structural Geology","url":"https://www.academia.edu/Documents/in/Structural_Geology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="4527" href="https://www.academia.edu/Documents/in/Africa">Africa</a><script data-card-contents-for-ri="4527" type="text/json">{"id":4527,"name":"Africa","url":"https://www.academia.edu/Documents/in/Africa?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=26784435]'), work: {"id":26784435,"title":"Volcano-tectonics of the Al Haruj Volcanic Province, Central Libya","created_at":"2016-07-06T11:29:07.838-07:00","url":"https://www.academia.edu/26784435/Volcano_tectonics_of_the_Al_Haruj_Volcanic_Province_Central_Libya?f_ri=15989","dom_id":"work_26784435","summary":"The Al Haruj intra-continental Volcanic Province (AHVP), located at the southwestern margin of the Sirt Basin, hosts the most extensive and recent volcanic activity in Libya-which is considered typical for plate interiors. From north to south the AHVP is divided into two subprovinces, namely Al Haruj al Aswad and Al Haruj al Abiyad. The total area of the AHVP is around 42,000km 2. Despite the great size of the AHVP, its volcano-tectonic evolution and activity have received very little attention and are poorly documented and understood. Here we present new field data, and analytical and numerical results, on the volcano-tectonics of the AHVP. The length/thickness ratio of 47 dykes and volcanic fissures were measured to estimate magmatic overpressure at the time of eruption. The average dyke (length/thickness) ratio of 421 indicates magmatic overpressures during the associate fissure eruptions of 8-19MPa (depending on host-rock elastic properties). Spatial distributions of 432 monogenetic eruptions sites/points (lava shields, pyroclastic cones) in the AHVP reveal two main clusters, one in the south and another in the north. Aligned eruptive vents show the dominating strike of volcanic fissures/feeder-dykes as WNW-ESE to NW-SE, coinciding with the orientation of one of main fracture/fault zones. Numerical modelling and field 2 observations suggest that some feeder-dykes may have used steeply dipping normal-fault zones as part of their paths to the surface.","downloadable_attachments":[{"id":47060236,"asset_id":26784435,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":468989,"first_name":"Agust","last_name":"Gudmundsson","domain_name":"royalholloway","page_name":"AgustGudmundsson","display_name":"Agust Gudmundsson","profile_url":"https://royalholloway.academia.edu/AgustGudmundsson?f_ri=15989","photo":"https://0.academia-photos.com/468989/156149/276788/s65_agust.gudmundsson.jpg"},{"id":50814866,"first_name":"Abdelsalam","last_name":"Elshaafi","domain_name":"royalholloway","page_name":"AbdelsalamElshaafi","display_name":"Abdelsalam Elshaafi","profile_url":"https://royalholloway.academia.edu/AbdelsalamElshaafi?f_ri=15989","photo":"https://0.academia-photos.com/50814866/65828419/54170925/s65_abdelsalam.elshaafi.jpg"}],"research_interests":[{"id":1252,"name":"Remote Sensing","url":"https://www.academia.edu/Documents/in/Remote_Sensing?f_ri=15989","nofollow":false},{"id":1370,"name":"Volcanology","url":"https://www.academia.edu/Documents/in/Volcanology?f_ri=15989","nofollow":false},{"id":1419,"name":"Structural Geology","url":"https://www.academia.edu/Documents/in/Structural_Geology?f_ri=15989","nofollow":false},{"id":4527,"name":"Africa","url":"https://www.academia.edu/Documents/in/Africa?f_ri=15989","nofollow":false},{"id":10769,"name":"Tectonics","url":"https://www.academia.edu/Documents/in/Tectonics?f_ri=15989"},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989"},{"id":20615,"name":"Petroleum geology","url":"https://www.academia.edu/Documents/in/Petroleum_geology?f_ri=15989"},{"id":135637,"name":"Volcanotectonics, Seismotectonics, Rock Fractures and Fluid Transport in Reservoirs","url":"https://www.academia.edu/Documents/in/Volcanotectonics_Seismotectonics_Rock_Fractures_and_Fluid_Transport_in_Reservoirs?f_ri=15989"},{"id":181670,"name":"Mantle plumes","url":"https://www.academia.edu/Documents/in/Mantle_plumes?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_24142934 coauthored" data-work_id="24142934" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/24142934/Paleozoic_ophiolites_in_the_Variscan_suture_of_Galicia_northwest_Spain_Distribution_characteristics_and_meaning">Paleozoic ophiolites in the Variscan suture of Galicia (northwest Spain): Distribution, characteristics, and meaning</a></div></div><div class="u-pb4x u-mt3x"></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/24142934" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="4194af8fa851417bc70306916f45b88b" rel="nofollow" data-download="{"attachment_id":44497290,"asset_id":24142934,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/44497290/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="46567191" href="https://ucm.academia.edu/RicardoArenas">Ricardo Arenas</a><script data-card-contents-for-user="46567191" type="text/json">{"id":46567191,"first_name":"Ricardo","last_name":"Arenas","domain_name":"ucm","page_name":"RicardoArenas","display_name":"Ricardo Arenas","profile_url":"https://ucm.academia.edu/RicardoArenas?f_ri=15989","photo":"/images/s65_no_pic.png"}</script></span></span><span class="u-displayInlineBlock InlineList-item-text"> and <span class="u-textDecorationUnderline u-clickable InlineList-item-text js-work-more-authors-24142934">+1</span><div class="hidden js-additional-users-24142934"><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://independent.academia.edu/JAbati">J. Abati</a></span></div></div></span><script>(function(){ var popoverSettings = { el: $('.js-work-more-authors-24142934'), placement: 'bottom', hide_delay: 200, html: true, content: function(){ return $('.js-additional-users-24142934').html(); } } new HoverPopover(popoverSettings); })();</script></li><li class="js-paper-rank-work_24142934 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="24142934"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 24142934, container: ".js-paper-rank-work_24142934", }); });</script></li><li class="js-percentile-work_24142934 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 24142934; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_24142934"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_24142934 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="24142934"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 24142934; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=24142934]").text(description); $(".js-view-count-work_24142934").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_24142934").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="24142934"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">6</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="1419" href="https://www.academia.edu/Documents/in/Structural_Geology">Structural Geology</a>, <script data-card-contents-for-ri="1419" type="text/json">{"id":1419,"name":"Structural Geology","url":"https://www.academia.edu/Documents/in/Structural_Geology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="2635" href="https://www.academia.edu/Documents/in/Metamorphic_Petrology">Metamorphic Petrology</a>, <script data-card-contents-for-ri="2635" type="text/json">{"id":2635,"name":"Metamorphic Petrology","url":"https://www.academia.edu/Documents/in/Metamorphic_Petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="10769" href="https://www.academia.edu/Documents/in/Tectonics">Tectonics</a>, <script data-card-contents-for-ri="10769" type="text/json">{"id":10769,"name":"Tectonics","url":"https://www.academia.edu/Documents/in/Tectonics?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a><script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=24142934]'), work: {"id":24142934,"title":"Paleozoic ophiolites in the Variscan suture of Galicia (northwest Spain): Distribution, characteristics, and meaning","created_at":"2016-04-06T22:51:58.587-07:00","url":"https://www.academia.edu/24142934/Paleozoic_ophiolites_in_the_Variscan_suture_of_Galicia_northwest_Spain_Distribution_characteristics_and_meaning?f_ri=15989","dom_id":"work_24142934","summary":null,"downloadable_attachments":[{"id":44497290,"asset_id":24142934,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":46567191,"first_name":"Ricardo","last_name":"Arenas","domain_name":"ucm","page_name":"RicardoArenas","display_name":"Ricardo Arenas","profile_url":"https://ucm.academia.edu/RicardoArenas?f_ri=15989","photo":"/images/s65_no_pic.png"},{"id":38791173,"first_name":"J.","last_name":"Abati","domain_name":"independent","page_name":"JAbati","display_name":"J. Abati","profile_url":"https://independent.academia.edu/JAbati?f_ri=15989","photo":"https://0.academia-photos.com/38791173/151078794/140664145/s65_j..abati.png"}],"research_interests":[{"id":1419,"name":"Structural Geology","url":"https://www.academia.edu/Documents/in/Structural_Geology?f_ri=15989","nofollow":false},{"id":2635,"name":"Metamorphic Petrology","url":"https://www.academia.edu/Documents/in/Metamorphic_Petrology?f_ri=15989","nofollow":false},{"id":10769,"name":"Tectonics","url":"https://www.academia.edu/Documents/in/Tectonics?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":16248,"name":"Ophiolites","url":"https://www.academia.edu/Documents/in/Ophiolites?f_ri=15989"},{"id":16937,"name":"Petrology and Geochemistry","url":"https://www.academia.edu/Documents/in/Petrology_and_Geochemistry?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_32642620" data-work_id="32642620" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/32642620/Light_rare_earth_element_mineralization_in_hydrothermal_veins_related_to_the_Jbel_Boho_alkaline_igneous_complex_AntiAtlas_Morocco_The_role_of_fluid_carbonate_interactions_in_the_deposition_of_synchysite_Ce_">Light rare-earth element mineralization in hydrothermal veins related to the Jbel Boho alkaline igneous complex, AntiAtlas/Morocco: The role of fluid-carbonate interactions in the deposition of synchysite-(Ce)</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The world's largest mined rare-earth element deposits are associated with alkaline magmatism, making it important to understand the mechanisms leading to magmatic and hydrothermal element enrichment. We present results from... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_32642620" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The world's largest mined rare-earth element deposits are associated with alkaline magmatism, making it important to understand the mechanisms leading to magmatic and hydrothermal element enrichment. We present results from late-differentiation-stage hydrothermal veins of the Jbel Boho alkaline complex in the district of Bou Azzer in the Anti-Atlas of Morocco, which show high light-REE enrichments. The REE mineralized veins occur around a syenitic pluton at the centre of the complex and consist of quartz-jasper and quartz veins which contain at least two silica generations. Only the second quartz generation is associated with LREE mineralization. The predominant REE-host mineral is the Ca-LREE-fluorcarbonate synchysite-(Ce), mainly present as anhedral crystals up to 200 μm. Some very small anhedral rhabdophane-(Ce) grains were also found in a synchysite-bearing quartz vein. Thermometric studies on mainly liquid-vapour-solid fluid inclusions in quartz crystals in the synchysite-bearing veins suggest very high salinity (32 to 37 wt% NaCl equiv.) of the mineralizing fluid. Homogenization temperatures from 150° to 250 °C provide the minimum temperature conditions in which the quartz veins were formed.<br />Based on recent experimental data, we propose a model for the formation of hydrothermal REE-Ca-F carbonate deposits in the veins, involving the transport of REE as chloride complexes at low pH conditions in the presence of fluoride ions. The deposition of synchysite is proposed to result from neutralization of this fluid by mixing of hydrothermal ore fluids with carbonate-rich meteoric water or by interaction with already existing carbonates in the vein, As well as raising the pH, this interaction also provides the Ca+ and CO32– ions needed for REE precipitation as Ca-F carbonates.<br />The barren veins show two types of mineralogy and REE patterns: quartz-carbonate veins with enrichment of LREE over HREE and iron-rich jasper-bearing veins with quite flat REE pattern and high HREE. The LREE/HREE fractionation in these veins seems to be controlled by an interplay of two factors: 1) a low activity of ligands like Cl, which favours LREE transport and (2) the mineralogical control, by which HREE having similar ionic radii to Fe2 + will be preferred over LREE.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/32642620" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="c93d25753dec3916114db7f8bd7bc2dd" rel="nofollow" data-download="{"attachment_id":52812266,"asset_id":32642620,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/52812266/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="10550780" href="https://constructor.academia.edu/RachidBenaouda">Rachid Benaouda</a><script data-card-contents-for-user="10550780" type="text/json">{"id":10550780,"first_name":"Rachid","last_name":"Benaouda","domain_name":"constructor","page_name":"RachidBenaouda","display_name":"Rachid Benaouda","profile_url":"https://constructor.academia.edu/RachidBenaouda?f_ri=15989","photo":"https://0.academia-photos.com/10550780/3191501/19031015/s65_rachid.benaouda.jpg"}</script></span></span></li><li class="js-paper-rank-work_32642620 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="32642620"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 32642620, container: ".js-paper-rank-work_32642620", }); });</script></li><li class="js-percentile-work_32642620 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 32642620; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_32642620"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_32642620 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="32642620"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 32642620; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=32642620]").text(description); $(".js-view-count-work_32642620").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_32642620").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="32642620"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">7</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="8117" href="https://www.academia.edu/Documents/in/REE_Geochemistry">REE Geochemistry</a>, <script data-card-contents-for-ri="8117" type="text/json">{"id":8117,"name":"REE Geochemistry","url":"https://www.academia.edu/Documents/in/REE_Geochemistry?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="66471" href="https://www.academia.edu/Documents/in/Mafic_Alkaline_Igneous_Rocks">Mafic Alkaline Igneous Rocks</a>, <script data-card-contents-for-ri="66471" type="text/json">{"id":66471,"name":"Mafic Alkaline Igneous Rocks","url":"https://www.academia.edu/Documents/in/Mafic_Alkaline_Igneous_Rocks?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="82911" href="https://www.academia.edu/Documents/in/fluid_Inclusions">fluid Inclusions</a><script data-card-contents-for-ri="82911" type="text/json">{"id":82911,"name":"fluid Inclusions","url":"https://www.academia.edu/Documents/in/fluid_Inclusions?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=32642620]'), work: {"id":32642620,"title":"Light rare-earth element mineralization in hydrothermal veins related to the Jbel Boho alkaline igneous complex, AntiAtlas/Morocco: The role of fluid-carbonate interactions in the deposition of synchysite-(Ce)","created_at":"2017-04-25T05:27:04.381-07:00","url":"https://www.academia.edu/32642620/Light_rare_earth_element_mineralization_in_hydrothermal_veins_related_to_the_Jbel_Boho_alkaline_igneous_complex_AntiAtlas_Morocco_The_role_of_fluid_carbonate_interactions_in_the_deposition_of_synchysite_Ce_?f_ri=15989","dom_id":"work_32642620","summary":"The world's largest mined rare-earth element deposits are associated with alkaline magmatism, making it important to understand the mechanisms leading to magmatic and hydrothermal element enrichment. We present results from late-differentiation-stage hydrothermal veins of the Jbel Boho alkaline complex in the district of Bou Azzer in the Anti-Atlas of Morocco, which show high light-REE enrichments. The REE mineralized veins occur around a syenitic pluton at the centre of the complex and consist of quartz-jasper and quartz veins which contain at least two silica generations. Only the second quartz generation is associated with LREE mineralization. The predominant REE-host mineral is the Ca-LREE-fluorcarbonate synchysite-(Ce), mainly present as anhedral crystals up to 200 μm. Some very small anhedral rhabdophane-(Ce) grains were also found in a synchysite-bearing quartz vein. Thermometric studies on mainly liquid-vapour-solid fluid inclusions in quartz crystals in the synchysite-bearing veins suggest very high salinity (32 to 37 wt% NaCl equiv.) of the mineralizing fluid. Homogenization temperatures from 150° to 250 °C provide the minimum temperature conditions in which the quartz veins were formed.\nBased on recent experimental data, we propose a model for the formation of hydrothermal REE-Ca-F carbonate deposits in the veins, involving the transport of REE as chloride complexes at low pH conditions in the presence of fluoride ions. The deposition of synchysite is proposed to result from neutralization of this fluid by mixing of hydrothermal ore fluids with carbonate-rich meteoric water or by interaction with already existing carbonates in the vein, As well as raising the pH, this interaction also provides the Ca+ and CO32– ions needed for REE precipitation as Ca-F carbonates.\nThe barren veins show two types of mineralogy and REE patterns: quartz-carbonate veins with enrichment of LREE over HREE and iron-rich jasper-bearing veins with quite flat REE pattern and high HREE. The LREE/HREE fractionation in these veins seems to be controlled by an interplay of two factors: 1) a low activity of ligands like Cl, which favours LREE transport and (2) the mineralogical control, by which HREE having similar ionic radii to Fe2 + will be preferred over LREE.","downloadable_attachments":[{"id":52812266,"asset_id":32642620,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":10550780,"first_name":"Rachid","last_name":"Benaouda","domain_name":"constructor","page_name":"RachidBenaouda","display_name":"Rachid Benaouda","profile_url":"https://constructor.academia.edu/RachidBenaouda?f_ri=15989","photo":"https://0.academia-photos.com/10550780/3191501/19031015/s65_rachid.benaouda.jpg"}],"research_interests":[{"id":8117,"name":"REE Geochemistry","url":"https://www.academia.edu/Documents/in/REE_Geochemistry?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":66471,"name":"Mafic Alkaline Igneous Rocks","url":"https://www.academia.edu/Documents/in/Mafic_Alkaline_Igneous_Rocks?f_ri=15989","nofollow":false},{"id":82911,"name":"fluid Inclusions","url":"https://www.academia.edu/Documents/in/fluid_Inclusions?f_ri=15989","nofollow":false},{"id":133925,"name":"Hydrothermal Ore Deposits","url":"https://www.academia.edu/Documents/in/Hydrothermal_Ore_Deposits?f_ri=15989"},{"id":362687,"name":"Quartz veins","url":"https://www.academia.edu/Documents/in/Quartz_veins?f_ri=15989"},{"id":834045,"name":"Triassic Trace Elements Geochemistry","url":"https://www.academia.edu/Documents/in/Triassic_Trace_Elements_Geochemistry?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_31801775" data-work_id="31801775" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/31801775/Introdu%C3%A7%C3%A3o_a_Petrologia_%C3%8Dgnea_e_Metam%C3%B3rfica_John_D_Winter_pdf">Introdução a Petrologia Ígnea e Metamórfica - John D. Winter.pdf</a></div></div><div class="u-pb4x u-mt3x"></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/31801775" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="b5819b732658b67ba567eb2813cac863" rel="nofollow" data-download="{"attachment_id":52100369,"asset_id":31801775,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/52100369/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="55330152" href="https://ufes.academia.edu/GuilhermeMarques">Guilherme Marques Martins</a><script data-card-contents-for-user="55330152" type="text/json">{"id":55330152,"first_name":"Guilherme","last_name":"Marques Martins","domain_name":"ufes","page_name":"GuilhermeMarques","display_name":"Guilherme Marques Martins","profile_url":"https://ufes.academia.edu/GuilhermeMarques?f_ri=15989","photo":"https://0.academia-photos.com/55330152/14582821/15443595/s65_guilherme.marques.jpg"}</script></span></span></li><li class="js-paper-rank-work_31801775 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="31801775"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 31801775, container: ".js-paper-rank-work_31801775", }); 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$(".js-view-count[data-work-id=31801775]").text(description); $(".js-view-count-work_31801775").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_31801775").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="31801775"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">4</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="2635" href="https://www.academia.edu/Documents/in/Metamorphic_Petrology">Metamorphic Petrology</a>, <script data-card-contents-for-ri="2635" type="text/json">{"id":2635,"name":"Metamorphic Petrology","url":"https://www.academia.edu/Documents/in/Metamorphic_Petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="366313" href="https://www.academia.edu/Documents/in/Petrologia_Metamorfica">Petrologia Metamórfica</a>, <script data-card-contents-for-ri="366313" type="text/json">{"id":366313,"name":"Petrologia Metamórfica","url":"https://www.academia.edu/Documents/in/Petrologia_Metamorfica?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="663113" href="https://www.academia.edu/Documents/in/Petrologia_IGnea">Petrologia ÍGnea</a><script data-card-contents-for-ri="663113" type="text/json">{"id":663113,"name":"Petrologia ÍGnea","url":"https://www.academia.edu/Documents/in/Petrologia_IGnea?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=31801775]'), work: {"id":31801775,"title":"Introdução a Petrologia Ígnea e Metamórfica - John D. Winter.pdf","created_at":"2017-03-10T03:18:47.441-08:00","url":"https://www.academia.edu/31801775/Introdu%C3%A7%C3%A3o_a_Petrologia_%C3%8Dgnea_e_Metam%C3%B3rfica_John_D_Winter_pdf?f_ri=15989","dom_id":"work_31801775","summary":null,"downloadable_attachments":[{"id":52100369,"asset_id":31801775,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":55330152,"first_name":"Guilherme","last_name":"Marques Martins","domain_name":"ufes","page_name":"GuilhermeMarques","display_name":"Guilherme Marques Martins","profile_url":"https://ufes.academia.edu/GuilhermeMarques?f_ri=15989","photo":"https://0.academia-photos.com/55330152/14582821/15443595/s65_guilherme.marques.jpg"}],"research_interests":[{"id":2635,"name":"Metamorphic Petrology","url":"https://www.academia.edu/Documents/in/Metamorphic_Petrology?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":366313,"name":"Petrologia Metamórfica","url":"https://www.academia.edu/Documents/in/Petrologia_Metamorfica?f_ri=15989","nofollow":false},{"id":663113,"name":"Petrologia ÍGnea","url":"https://www.academia.edu/Documents/in/Petrologia_IGnea?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_6821608" data-work_id="6821608" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/6821608/Computerized_Analysis_of_Vibroseis_Signal_SIMILARITY">Computerized Analysis of Vibroseis Signal SIMILARITY</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Computerized evaluation of Vibroseis similarity test data is the logical consequence of the increasing quality requirements for signal reproducibility and for synchronization of vibrators. The differences in start time and phase as well... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_6821608" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Computerized evaluation of Vibroseis similarity test data is the logical consequence of the increasing quality requirements for signal reproducibility and for synchronization of vibrators. The differences in start time and phase as well as an indication of local phasing problems between any two Vibroseis signals can be obtained from an analysis of the difference of their respective phase spectra. This method appears to be accurate and stable with respect to harmonics which usually plague the signals from transducers monitoring the motion of the vibrators'base plates.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/6821608" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="2ca990f2fa02081846e6eb29a5c610cd" rel="nofollow" data-download="{"attachment_id":48711899,"asset_id":6821608,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/48711899/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="11344883" href="https://independent.academia.edu/EikeRietsch">Eike Rietsch</a><script data-card-contents-for-user="11344883" type="text/json">{"id":11344883,"first_name":"Eike","last_name":"Rietsch","domain_name":"independent","page_name":"EikeRietsch","display_name":"Eike Rietsch","profile_url":"https://independent.academia.edu/EikeRietsch?f_ri=15989","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_6821608 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="6821608"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 6821608, container: ".js-paper-rank-work_6821608", }); 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The differences in start time and phase as well as an indication of local phasing problems between any two Vibroseis signals can be obtained from an analysis of the difference of their respective phase spectra. This method appears to be accurate and stable with respect to harmonics which usually plague the signals from transducers monitoring the motion of the vibrators'base plates.","downloadable_attachments":[{"id":48711899,"asset_id":6821608,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":11344883,"first_name":"Eike","last_name":"Rietsch","domain_name":"independent","page_name":"EikeRietsch","display_name":"Eike Rietsch","profile_url":"https://independent.academia.edu/EikeRietsch?f_ri=15989","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":403,"name":"Gemology","url":"https://www.academia.edu/Documents/in/Gemology?f_ri=15989","nofollow":false},{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology?f_ri=15989","nofollow":false},{"id":407,"name":"Geochemistry","url":"https://www.academia.edu/Documents/in/Geochemistry?f_ri=15989","nofollow":false},{"id":408,"name":"Geomorphology","url":"https://www.academia.edu/Documents/in/Geomorphology?f_ri=15989","nofollow":false},{"id":409,"name":"Geophysics","url":"https://www.academia.edu/Documents/in/Geophysics?f_ri=15989"},{"id":410,"name":"Glaciology","url":"https://www.academia.edu/Documents/in/Glaciology?f_ri=15989"},{"id":411,"name":"Hydrogeology","url":"https://www.academia.edu/Documents/in/Hydrogeology?f_ri=15989"},{"id":414,"name":"Mineralogy","url":"https://www.academia.edu/Documents/in/Mineralogy?f_ri=15989"},{"id":417,"name":"Paleontology","url":"https://www.academia.edu/Documents/in/Paleontology?f_ri=15989"},{"id":421,"name":"Soil 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Geology","url":"https://www.academia.edu/Documents/in/Regional_Geology?f_ri=15989"},{"id":581258,"name":"Hazards","url":"https://www.academia.edu/Documents/in/Hazards?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_44557405" data-work_id="44557405" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/44557405/Geochemical_and_Petrology_Properties_of_Zafarghand_Index_and_Kahang_Deposit_of_Porphyry_Copper_Molybdenum">Geochemical and Petrology Properties of Zafarghand Index and Kahang Deposit of Porphyry Copper-Molybdenum</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The probability of the occurrence of porphyry copper ore associated with subduction zone of the Neo-Tethys ocean and volcanic arc of Iran (Urumieh-Dokhtar) justifies the necessity of exploration and prospection of this type of ore in... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_44557405" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The probability of the occurrence of porphyry copper ore associated with subduction zone of the Neo-Tethys ocean and volcanic arc of Iran (Urumieh-Dokhtar) justifies the necessity of exploration and prospection of this type of ore in Iran. Zafarghand index and Kahang deposit of porphyry copper-molybdenum located in Isfahan province, center of Iran using Satellite data interpretations were discovered in the years of 2010 and 2003, respectively. Geological studies have indicated the presence of argillic and propylitic alteration halos associated with porphyry copper systems. The 250 rock samples were systematically collected at a sampling distance of 100 m and in the center of the porphyry system by a distance o f 50 m in Zafarghand. Also, 377 samples of lithogeochemicals (185 rock samples and 192 soil samples) were extracted systematically from Kahang deposit. The study of geochemical data of rock and soil samples showed similarity of these two types of mineralization with other mineralization of porphyry copper-molybdenum elsewhere in the world. Finally, the comparison of geochemical anomalies copper with rock units and alteration zones showed that atmospheric waters had washed out the copper in some of these zones and probably the supergene zone was formed in depth as porphyry copper-molybdenum deposit.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/44557405" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="91b47de16aa6ccb1871ad7600f782403" rel="nofollow" data-download="{"attachment_id":65009324,"asset_id":44557405,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/65009324/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="24006386" href="https://aud.academia.edu/KavehOstadAliAskari">Kaveh Ostad-Ali-Askari</a><script data-card-contents-for-user="24006386" type="text/json">{"id":24006386,"first_name":"Kaveh","last_name":"Ostad-Ali-Askari","domain_name":"aud","page_name":"KavehOstadAliAskari","display_name":"Kaveh Ostad-Ali-Askari","profile_url":"https://aud.academia.edu/KavehOstadAliAskari?f_ri=15989","photo":"https://0.academia-photos.com/24006386/9871597/162121984/s65_kaveh.ostad-ali-askari.jpg"}</script></span></span></li><li class="js-paper-rank-work_44557405 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="44557405"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 44557405, container: ".js-paper-rank-work_44557405", }); 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Zafarghand index and Kahang deposit of porphyry copper-molybdenum located in Isfahan province, center of Iran using Satellite data interpretations were discovered in the years of 2010 and 2003, respectively. Geological studies have indicated the presence of argillic and propylitic alteration halos associated with porphyry copper systems. The 250 rock samples were systematically collected at a sampling distance of 100 m and in the center of the porphyry system by a distance o f 50 m in Zafarghand. Also, 377 samples of lithogeochemicals (185 rock samples and 192 soil samples) were extracted systematically from Kahang deposit. The study of geochemical data of rock and soil samples showed similarity of these two types of mineralization with other mineralization of porphyry copper-molybdenum elsewhere in the world. Finally, the comparison of geochemical anomalies copper with rock units and alteration zones showed that atmospheric waters had washed out the copper in some of these zones and probably the supergene zone was formed in depth as porphyry copper-molybdenum deposit.","downloadable_attachments":[{"id":65009324,"asset_id":44557405,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":24006386,"first_name":"Kaveh","last_name":"Ostad-Ali-Askari","domain_name":"aud","page_name":"KavehOstadAliAskari","display_name":"Kaveh Ostad-Ali-Askari","profile_url":"https://aud.academia.edu/KavehOstadAliAskari?f_ri=15989","photo":"https://0.academia-photos.com/24006386/9871597/162121984/s65_kaveh.ostad-ali-askari.jpg"}],"research_interests":[{"id":402,"name":"Environmental Science","url":"https://www.academia.edu/Documents/in/Environmental_Science?f_ri=15989","nofollow":false},{"id":421,"name":"Soil 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u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_43408834" data-work_id="43408834" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/43408834/Petrography_and_Geochemistry_of_Granitoids_from_Betul_Crystalline_Complex_Central_India">Petrography and Geochemistry of Granitoids from Betul Crystalline Complex, Central India</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The Betul crystalline complex (BCC) forms a conspicuous litho-tectonic unit of the Central Indian Tectonic Zone (CITZ). The BCC occurs in central part of CITZ in between the northern Mahakoshal belt and southern Sausar belt and comprises... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_43408834" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The Betul crystalline complex (BCC) forms a conspicuous litho-tectonic unit of the Central Indian Tectonic Zone (CITZ). The BCC occurs in central part of CITZ in between the northern Mahakoshal belt and southern Sausar belt and comprises of three distinct rock associations, i) Supracrustal rocks, ii) Mafic-Ultramafic suites and iii) Syn-to post-kinematic granitic rock and bimodal volcanics. The rocks of BCC have undergone three phases of progressive deformation and its environs were evolved near continental margin arc. Two phases of granitic emplacements are evident in BCC. Geochemical characterisation of basement granitoids of the BCC was carried out during the present work. The geochemical characteristics of these granitoids are comparable with I-type granites, which are metaluminous to peraluminous in nature and belongs to medium to high-K calc-alkaline series that displays characteristics of typical volcanic arc granites related to the active continental margin.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/43408834" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="ae3ab138ae67756383b4958f086d1937" rel="nofollow" data-download="{"attachment_id":63708456,"asset_id":43408834,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/63708456/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="511947" href="https://nagpuruniversity.academia.edu/apopharegmailcom">Anil M Pophare</a><script data-card-contents-for-user="511947" type="text/json">{"id":511947,"first_name":"Anil","last_name":"Pophare","domain_name":"nagpuruniversity","page_name":"apopharegmailcom","display_name":"Anil M Pophare","profile_url":"https://nagpuruniversity.academia.edu/apopharegmailcom?f_ri=15989","photo":"https://0.academia-photos.com/511947/2735669/6958973/s65_anil.pophare.jpg"}</script></span></span></li><li class="js-paper-rank-work_43408834 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="43408834"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 43408834, container: ".js-paper-rank-work_43408834", }); 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The BCC occurs in central part of CITZ in between the northern Mahakoshal belt and southern Sausar belt and comprises of three distinct rock associations, i) Supracrustal rocks, ii) Mafic-Ultramafic suites and iii) Syn-to post-kinematic granitic rock and bimodal volcanics. The rocks of BCC have undergone three phases of progressive deformation and its environs were evolved near continental margin arc. Two phases of granitic emplacements are evident in BCC. Geochemical characterisation of basement granitoids of the BCC was carried out during the present work. The geochemical characteristics of these granitoids are comparable with I-type granites, which are metaluminous to peraluminous in nature and belongs to medium to high-K calc-alkaline series that displays characteristics of typical volcanic arc granites related to the active continental margin.","downloadable_attachments":[{"id":63708456,"asset_id":43408834,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":511947,"first_name":"Anil","last_name":"Pophare","domain_name":"nagpuruniversity","page_name":"apopharegmailcom","display_name":"Anil M Pophare","profile_url":"https://nagpuruniversity.academia.edu/apopharegmailcom?f_ri=15989","photo":"https://0.academia-photos.com/511947/2735669/6958973/s65_anil.pophare.jpg"}],"research_interests":[{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 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href="https://www.academia.edu/Documents/in/Petrology">Petrology</a>, <script data-card-contents-for-ri="2404" type="text/json">{"id":2404,"name":"Petrology","url":"https://www.academia.edu/Documents/in/Petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="459476" href="https://www.academia.edu/Documents/in/Rocks">Rocks</a>, <script data-card-contents-for-ri="459476" type="text/json">{"id":459476,"name":"Rocks","url":"https://www.academia.edu/Documents/in/Rocks?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="976618" 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class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/41699716/Petrochemistry_and_manganese_mineralization_potentials_of_the_calc_alkaline_granitoids_from_Northeastern_Hawal_Massif_North_Eastern_Nigeria_Petrochemistry_Calc_alkaline_Manganese_mineralization_Hawal_Massif">Petrochemistry and manganese mineralization potentials of the calc-alkaline granitoids from Northeastern Hawal Massif, North-Eastern Nigeria Petrochemistry Calc-alkaline Manganese mineralization Hawal Massif</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">High-K calc-alkaline granitoids exposed in Mubi area, northeastern Hawal massif forms an integral part of the well-exposed syn-to post-collisional plutons in eastern Nigeria. The evolution of the rocks can be linked to the thermo-tectonic... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_41699716" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">High-K calc-alkaline granitoids exposed in Mubi area, northeastern Hawal massif forms an integral part of the well-exposed syn-to post-collisional plutons in eastern Nigeria. The evolution of the rocks can be linked to the thermo-tectonic period of faulting, uplift, cooling, fractionation, and high-level magmatism, which initiated granite intrusion and associated rocks during the Paleoproterozoic. A total of nine granitic rocks, constituting seven biotite granites of varying grain sizes and two porphyritic granites were sampled in Mubi area to shed new light regarding their petrochemistry. Detailed investigations indicate that the study area constitutes majorly Pan African granitoids. The massif has S-type strongly peraluminous geochemical signature, high-K calc-alkaline, magnesian, granodi-orite, exemplified by high ASI (averagely 0.81-1.59), low Na 2 O (average 2.09 wt. %), and CaO (average 2.37 wt%). More so, they exhibit low FeO t /(FeO t + MgO) ratios (0.64-0.80 wt%), low to moderate Na 2 O+K 2 O-CaO ratio (2.41-5.41 wt%), high Na 2 O+K 2 O (average 6.42 wt%), and K 2 O/Na 2 O ratios (average 2.11 wt%), as well as high Mg# (30.49-50.22), low molar CaO/(MgO + FeO t) (0.19-0.63 wt%), and molar Al 2 O 3 /(MgO + FeO t) ratio (2.10-4.31 wt%). Discrimination diagram shows that the granitoids are products of sedimentary protolith (metagreywacke) formed within a syn-collision and supra-crustal setting. The constituent mineral assemblages in the granitoids (quartz, plagioclase, alkali feldspar, bio-tite, hornblende, titanite, and iron oxides) from the northeastern Hawal massif are obviously related to the condition of evolution and compositions of the protolith. The manganese ore and associated minerals in the area are controlled by the N-S pegmatitic quartz, which is part of the Cameroon Volcanic Line. The manganese minerals are hydrothermally generated from rising thermal waters due to pressure decline and subsequent reactions with the crystalline igneous rocks, which consequently triggered the precipitation of manganese oxides of metallurgical grade (44.36-49.56 wt%) that can be further processed into desired metallic alloy to meet the required industrial standards. 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$(".js-view-count[data-work-id=41699716]").text(description); $(".js-view-count-work_41699716").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_41699716").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="41699716"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">4</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="406" href="https://www.academia.edu/Documents/in/Geology">Geology</a>, <script data-card-contents-for-ri="406" type="text/json">{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="10769" href="https://www.academia.edu/Documents/in/Tectonics">Tectonics</a>, <script data-card-contents-for-ri="10769" type="text/json">{"id":10769,"name":"Tectonics","url":"https://www.academia.edu/Documents/in/Tectonics?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="16937" href="https://www.academia.edu/Documents/in/Petrology_and_Geochemistry">Petrology and Geochemistry</a><script data-card-contents-for-ri="16937" type="text/json">{"id":16937,"name":"Petrology and Geochemistry","url":"https://www.academia.edu/Documents/in/Petrology_and_Geochemistry?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=41699716]'), work: {"id":41699716,"title":"Petrochemistry and manganese mineralization potentials of the calc-alkaline granitoids from Northeastern Hawal Massif, North-Eastern Nigeria Petrochemistry Calc-alkaline Manganese mineralization Hawal Massif","created_at":"2020-01-22T02:37:56.380-08:00","url":"https://www.academia.edu/41699716/Petrochemistry_and_manganese_mineralization_potentials_of_the_calc_alkaline_granitoids_from_Northeastern_Hawal_Massif_North_Eastern_Nigeria_Petrochemistry_Calc_alkaline_Manganese_mineralization_Hawal_Massif?f_ri=15989","dom_id":"work_41699716","summary":"High-K calc-alkaline granitoids exposed in Mubi area, northeastern Hawal massif forms an integral part of the well-exposed syn-to post-collisional plutons in eastern Nigeria. The evolution of the rocks can be linked to the thermo-tectonic period of faulting, uplift, cooling, fractionation, and high-level magmatism, which initiated granite intrusion and associated rocks during the Paleoproterozoic. A total of nine granitic rocks, constituting seven biotite granites of varying grain sizes and two porphyritic granites were sampled in Mubi area to shed new light regarding their petrochemistry. Detailed investigations indicate that the study area constitutes majorly Pan African granitoids. The massif has S-type strongly peraluminous geochemical signature, high-K calc-alkaline, magnesian, granodi-orite, exemplified by high ASI (averagely 0.81-1.59), low Na 2 O (average 2.09 wt. %), and CaO (average 2.37 wt%). More so, they exhibit low FeO t /(FeO t + MgO) ratios (0.64-0.80 wt%), low to moderate Na 2 O+K 2 O-CaO ratio (2.41-5.41 wt%), high Na 2 O+K 2 O (average 6.42 wt%), and K 2 O/Na 2 O ratios (average 2.11 wt%), as well as high Mg# (30.49-50.22), low molar CaO/(MgO + FeO t) (0.19-0.63 wt%), and molar Al 2 O 3 /(MgO + FeO t) ratio (2.10-4.31 wt%). Discrimination diagram shows that the granitoids are products of sedimentary protolith (metagreywacke) formed within a syn-collision and supra-crustal setting. The constituent mineral assemblages in the granitoids (quartz, plagioclase, alkali feldspar, bio-tite, hornblende, titanite, and iron oxides) from the northeastern Hawal massif are obviously related to the condition of evolution and compositions of the protolith. The manganese ore and associated minerals in the area are controlled by the N-S pegmatitic quartz, which is part of the Cameroon Volcanic Line. The manganese minerals are hydrothermally generated from rising thermal waters due to pressure decline and subsequent reactions with the crystalline igneous rocks, which consequently triggered the precipitation of manganese oxides of metallurgical grade (44.36-49.56 wt%) that can be further processed into desired metallic alloy to meet the required industrial standards. ARTICLE INFO","downloadable_attachments":[{"id":61858609,"asset_id":41699716,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":67884970,"first_name":"Hafizullah","last_name":"Ahmed","domain_name":"independent","page_name":"HifzullahAhmed","display_name":"Hafizullah A Ahmed","profile_url":"https://independent.academia.edu/HifzullahAhmed?f_ri=15989","photo":"https://0.academia-photos.com/67884970/19066260/19016930/s65_hifzullah.ahmed.jpg"}],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology?f_ri=15989","nofollow":false},{"id":10769,"name":"Tectonics","url":"https://www.academia.edu/Documents/in/Tectonics?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":16937,"name":"Petrology and Geochemistry","url":"https://www.academia.edu/Documents/in/Petrology_and_Geochemistry?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_29297536" data-work_id="29297536" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/29297536/Igneous_Rocks_A_Classification_and_Glossary_of_Terms_2nd_Le_Maitre">Igneous Rocks A Classification and Glossary of Terms 2nd Le Maitre</a></div></div><div class="u-pb4x u-mt3x"></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/29297536" data-share-source="work_strip" 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itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="55330152" href="https://ufes.academia.edu/GuilhermeMarques">Guilherme Marques Martins</a><script data-card-contents-for-user="55330152" type="text/json">{"id":55330152,"first_name":"Guilherme","last_name":"Marques Martins","domain_name":"ufes","page_name":"GuilhermeMarques","display_name":"Guilherme Marques Martins","profile_url":"https://ufes.academia.edu/GuilhermeMarques?f_ri=15989","photo":"https://0.academia-photos.com/55330152/14582821/15443595/s65_guilherme.marques.jpg"}</script></span></span></li><li class="js-paper-rank-work_29297536 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="29297536"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 29297536, container: 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type="text/json">{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="2404" href="https://www.academia.edu/Documents/in/Petrology">Petrology</a>, <script data-card-contents-for-ri="2404" type="text/json">{"id":2404,"name":"Petrology","url":"https://www.academia.edu/Documents/in/Petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="65805" href="https://www.academia.edu/Documents/in/Nomenclature">Nomenclature</a><script data-card-contents-for-ri="65805" 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Martins","profile_url":"https://ufes.academia.edu/GuilhermeMarques?f_ri=15989","photo":"https://0.academia-photos.com/55330152/14582821/15443595/s65_guilherme.marques.jpg"}],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology?f_ri=15989","nofollow":false},{"id":2404,"name":"Petrology","url":"https://www.academia.edu/Documents/in/Petrology?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":65805,"name":"Nomenclature","url":"https://www.academia.edu/Documents/in/Nomenclature?f_ri=15989","nofollow":false},{"id":66471,"name":"Mafic Alkaline Igneous Rocks","url":"https://www.academia.edu/Documents/in/Mafic_Alkaline_Igneous_Rocks?f_ri=15989"},{"id":147519,"name":"Geologia","url":"https://www.academia.edu/Documents/in/Geologia?f_ri=15989"},{"id":163307,"name":"Facilitation","url":"https://www.academia.edu/Documents/in/Facilitation?f_ri=15989"},{"id":242974,"name":"Ultramafic","url":"https://www.academia.edu/Documents/in/Ultramafic?f_ri=15989"},{"id":951061,"name":"Nomenclatura","url":"https://www.academia.edu/Documents/in/Nomenclatura?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_6247959" data-work_id="6247959" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/6247959/BINARY_PERITECTIC_SYSTEM_by_SUSHIL_SUBHADEEP_NAYAK">BINARY PERITECTIC SYSTEM by SUSHIL SUBHADEEP NAYAK</a></div></div><div class="u-pb4x u-mt3x"></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/6247959" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="39261f7c68e6deda06aefe7ae340d799" rel="nofollow" data-download="{"attachment_id":33107898,"asset_id":6247959,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/33107898/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="9616051" href="https://iitkgp.academia.edu/SUSHILSUBHADEEPNAYAK">SUSHIL SUBHADEEP NAYAK</a><script data-card-contents-for-user="9616051" type="text/json">{"id":9616051,"first_name":"SUSHIL SUBHADEEP","last_name":"NAYAK","domain_name":"iitkgp","page_name":"SUSHILSUBHADEEPNAYAK","display_name":"SUSHIL SUBHADEEP NAYAK","profile_url":"https://iitkgp.academia.edu/SUSHILSUBHADEEPNAYAK?f_ri=15989","photo":"https://0.academia-photos.com/9616051/3031086/3561751/s65_sushil_subhadeep.nayak.jpg"}</script></span></span></li><li class="js-paper-rank-work_6247959 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="6247959"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 6247959, container: ".js-paper-rank-work_6247959", }); });</script></li><li class="js-percentile-work_6247959 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 6247959; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_6247959"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_6247959 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="6247959"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 6247959; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=6247959]").text(description); $(".js-view-count-work_6247959").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_6247959").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="6247959"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i></div><span class="InlineList-item-text u-textTruncate u-pl6x"><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a><script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (false) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=6247959]'), work: {"id":6247959,"title":"BINARY PERITECTIC SYSTEM by SUSHIL SUBHADEEP NAYAK","created_at":"2014-03-01T02:11:44.653-08:00","url":"https://www.academia.edu/6247959/BINARY_PERITECTIC_SYSTEM_by_SUSHIL_SUBHADEEP_NAYAK?f_ri=15989","dom_id":"work_6247959","summary":null,"downloadable_attachments":[{"id":33107898,"asset_id":6247959,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":9616051,"first_name":"SUSHIL SUBHADEEP","last_name":"NAYAK","domain_name":"iitkgp","page_name":"SUSHILSUBHADEEPNAYAK","display_name":"SUSHIL SUBHADEEP NAYAK","profile_url":"https://iitkgp.academia.edu/SUSHILSUBHADEEPNAYAK?f_ri=15989","photo":"https://0.academia-photos.com/9616051/3031086/3561751/s65_sushil_subhadeep.nayak.jpg"}],"research_interests":[{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_8703572" data-work_id="8703572" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/8703572/The_timescales_of_magmatic_processes_prior_to_a_caldera_forming_eruption">The timescales of magmatic processes prior to a caldera-forming eruption</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Large, explosive, caldera-forming eruptions are amongst the most destructive phenomena on the planet, but the processes that allow the large bodies of crystal-poor silicic magma that feed them to assemble in the shallow crust are still... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_8703572" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Large, explosive, caldera-forming eruptions are amongst the most destructive phenomena on the planet, but the processes that allow the large bodies of crystal-poor silicic magma that feed them to assemble in the shallow crust are still poorly understood. Of particular interest is the timescales over which these reservoirs exist prior to eruption. Long storage times—up to 10^5 y—have previously been estimated using the repose times between eruptions and radiometric dating of crystals found within the eruptive products. However, more recent work modelling diffusion within single crystals has been used to argue that the reservoirs that feed even the largest eruptions are assembled over much shorter periods—10^1–10^2 y. <br /> <br />In order to address this question, I studied the >10 km3, 22-ka, dacitic Cape Riva eruption of Santorini, Greece. Over the ~18 ky preceding the Cape Riva eruption a series of dacitic lava dome and coulées were erupted, and these lavas are interspersed with occasional dacitic pumice fall deposits (the Therasia dome complex). These dacites have similar major element contents to the dacite that was erupted during the Cape Riva eruption, and have previously been described as “precursory leaks” from the growing Cape Riva magma reservoir. However, the Cape Riva magma is depleted in incompatible elements (such as K, Zr, La, Ce) relative to the Therasia magma, as are the plagioclase crystals in the respective magmas. This difference cannot be explained using shallow processes such as fractional crystallisation or crustal assimilation, which suggests that the Cape Riva and Therasia magmas are separate batches. Furthermore, there is evidence that the Therasia dacites were not fed from a long-lived, melt-dominated reservoir. There are non-systematic variations in melt composition, plagioclase rim compositions, and plagioclase textures throughout the sequence. In addition, high-temperature residence times of plagioclase and orthopyroxene crystals from the Therasia dacites estimated using diffusion chronometry are 10^1–10^2 y. This is short compared to the average time between eruptions (~1,500 y), which suggests the crystals in each lava grew only shortly before eruption. The different incompatible element contents of the Cape Riva and Therasia magmas and plagioclase crystals suggest that a new batch of incompatible-depleted silicic magma arrived in the shallow volcanic plumbing system shortly before the Cape Riva eruption. This influx must have taken place after the last Therasia eruption, which 40Ar/39Ar dates show occurred less than 2,800 ± 1,400 years before the Cape Riva eruption. <br /> <br />The rims of the plagioclase crystals found in the Cape Riva dacite are in equilibrium with a rhyodacite, with a similar composition to the Cape Riva glass. However, the major and trace element zoning patterns of the crystals record variations in the melt composition during their growth. The compositions at the centre of most crystals are the same as the rims; however, these crystals are often partially resorbed and overgrown by more calcic plagioclase. The plagioclase then grades normally back to rim compositions. This cycle is repeated up to three times. The tight relationships between the anorthite, Sr and Ti contents of the different zones suggests that the composition of the plagioclase crystals correlates with the composition of the melt from which they grew. The different plagioclase compositions correspond to dacitic and rhyodacitic melt compositions. The orthopyroxene crystals reveal a similar sequence, although they only record one cycle. These zoning patterns are interpreted to document the assembly of the Cape Riva reservoir in the shallow crust through the amalgamation of multiple batches of compositionally diverse magma. Models of magnesium diffusion in plagioclase and Fe–Mg interdiffusion in orthopyroxene suggest that this amalgamation took place within 10^1–10^2 y of the Cape Riva eruption.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/8703572" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="e3749b4f0dbf8aa02df29f178b9a85bd" rel="nofollow" data-download="{"attachment_id":35055422,"asset_id":8703572,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/35055422/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="2568459" href="https://nanyang.academia.edu/GarethFabbro">Gareth Fabbro</a><script data-card-contents-for-user="2568459" type="text/json">{"id":2568459,"first_name":"Gareth","last_name":"Fabbro","domain_name":"nanyang","page_name":"GarethFabbro","display_name":"Gareth Fabbro","profile_url":"https://nanyang.academia.edu/GarethFabbro?f_ri=15989","photo":"https://0.academia-photos.com/2568459/2542284/2950939/s65_gareth.fabbro.jpg"}</script></span></span></li><li class="js-paper-rank-work_8703572 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="8703572"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 8703572, container: ".js-paper-rank-work_8703572", }); 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$(".js-view-count[data-work-id=8703572]").text(description); $(".js-view-count-work_8703572").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_8703572").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="8703572"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">10</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="406" href="https://www.academia.edu/Documents/in/Geology">Geology</a>, <script data-card-contents-for-ri="406" type="text/json">{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="407" href="https://www.academia.edu/Documents/in/Geochemistry">Geochemistry</a>, <script data-card-contents-for-ri="407" type="text/json">{"id":407,"name":"Geochemistry","url":"https://www.academia.edu/Documents/in/Geochemistry?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="1370" href="https://www.academia.edu/Documents/in/Volcanology">Volcanology</a>, <script data-card-contents-for-ri="1370" type="text/json">{"id":1370,"name":"Volcanology","url":"https://www.academia.edu/Documents/in/Volcanology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a><script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=8703572]'), work: {"id":8703572,"title":"The timescales of magmatic processes prior to a caldera-forming eruption","created_at":"2014-10-08T22:18:23.677-07:00","url":"https://www.academia.edu/8703572/The_timescales_of_magmatic_processes_prior_to_a_caldera_forming_eruption?f_ri=15989","dom_id":"work_8703572","summary":"Large, explosive, caldera-forming eruptions are amongst the most destructive phenomena on the planet, but the processes that allow the large bodies of crystal-poor silicic magma that feed them to assemble in the shallow crust are still poorly understood. Of particular interest is the timescales over which these reservoirs exist prior to eruption. Long storage times—up to 10^5 y—have previously been estimated using the repose times between eruptions and radiometric dating of crystals found within the eruptive products. However, more recent work modelling diffusion within single crystals has been used to argue that the reservoirs that feed even the largest eruptions are assembled over much shorter periods—10^1–10^2 y.\r\n\r\nIn order to address this question, I studied the \u003e10 km3, 22-ka, dacitic Cape Riva eruption of Santorini, Greece. Over the ~18 ky preceding the Cape Riva eruption a series of dacitic lava dome and coulées were erupted, and these lavas are interspersed with occasional dacitic pumice fall deposits (the Therasia dome complex). These dacites have similar major element contents to the dacite that was erupted during the Cape Riva eruption, and have previously been described as “precursory leaks” from the growing Cape Riva magma reservoir. However, the Cape Riva magma is depleted in incompatible elements (such as K, Zr, La, Ce) relative to the Therasia magma, as are the plagioclase crystals in the respective magmas. This difference cannot be explained using shallow processes such as fractional crystallisation or crustal assimilation, which suggests that the Cape Riva and Therasia magmas are separate batches. Furthermore, there is evidence that the Therasia dacites were not fed from a long-lived, melt-dominated reservoir. There are non-systematic variations in melt composition, plagioclase rim compositions, and plagioclase textures throughout the sequence. In addition, high-temperature residence times of plagioclase and orthopyroxene crystals from the Therasia dacites estimated using diffusion chronometry are 10^1–10^2 y. This is short compared to the average time between eruptions (~1,500 y), which suggests the crystals in each lava grew only shortly before eruption. The different incompatible element contents of the Cape Riva and Therasia magmas and plagioclase crystals suggest that a new batch of incompatible-depleted silicic magma arrived in the shallow volcanic plumbing system shortly before the Cape Riva eruption. This influx must have taken place after the last Therasia eruption, which 40Ar/39Ar dates show occurred less than 2,800 ± 1,400 years before the Cape Riva eruption.\r\n\r\nThe rims of the plagioclase crystals found in the Cape Riva dacite are in equilibrium with a rhyodacite, with a similar composition to the Cape Riva glass. However, the major and trace element zoning patterns of the crystals record variations in the melt composition during their growth. The compositions at the centre of most crystals are the same as the rims; however, these crystals are often partially resorbed and overgrown by more calcic plagioclase. The plagioclase then grades normally back to rim compositions. This cycle is repeated up to three times. The tight relationships between the anorthite, Sr and Ti contents of the different zones suggests that the composition of the plagioclase crystals correlates with the composition of the melt from which they grew. The different plagioclase compositions correspond to dacitic and rhyodacitic melt compositions. The orthopyroxene crystals reveal a similar sequence, although they only record one cycle. These zoning patterns are interpreted to document the assembly of the Cape Riva reservoir in the shallow crust through the amalgamation of multiple batches of compositionally diverse magma. Models of magnesium diffusion in plagioclase and Fe–Mg interdiffusion in orthopyroxene suggest that this amalgamation took place within 10^1–10^2 y of the Cape Riva eruption.","downloadable_attachments":[{"id":35055422,"asset_id":8703572,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":2568459,"first_name":"Gareth","last_name":"Fabbro","domain_name":"nanyang","page_name":"GarethFabbro","display_name":"Gareth Fabbro","profile_url":"https://nanyang.academia.edu/GarethFabbro?f_ri=15989","photo":"https://0.academia-photos.com/2568459/2542284/2950939/s65_gareth.fabbro.jpg"}],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology?f_ri=15989","nofollow":false},{"id":407,"name":"Geochemistry","url":"https://www.academia.edu/Documents/in/Geochemistry?f_ri=15989","nofollow":false},{"id":1370,"name":"Volcanology","url":"https://www.academia.edu/Documents/in/Volcanology?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":16937,"name":"Petrology and Geochemistry","url":"https://www.academia.edu/Documents/in/Petrology_and_Geochemistry?f_ri=15989"},{"id":83315,"name":"Diffusion","url":"https://www.academia.edu/Documents/in/Diffusion?f_ri=15989"},{"id":138261,"name":"Magma Chambers","url":"https://www.academia.edu/Documents/in/Magma_Chambers?f_ri=15989"},{"id":185650,"name":"Santorini eruption dates","url":"https://www.academia.edu/Documents/in/Santorini_eruption_dates?f_ri=15989"},{"id":200887,"name":"Explosive volcanic eruptions","url":"https://www.academia.edu/Documents/in/Explosive_volcanic_eruptions?f_ri=15989"},{"id":269328,"name":"Santorini","url":"https://www.academia.edu/Documents/in/Santorini?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_12985051" data-work_id="12985051" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/12985051/chemical_fundamentals_geology_gill_2015">chemical fundamentals geology gill, 2015</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest">geology fundamentals mc graw hill 2015, lastest version</div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/12985051" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="0a98e7eddbda63e104e7f8c46548db85" rel="nofollow" data-download="{"attachment_id":37907460,"asset_id":12985051,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" 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type="text/json">{"id":407,"name":"Geochemistry","url":"https://www.academia.edu/Documents/in/Geochemistry?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="16937" href="https://www.academia.edu/Documents/in/Petrology_and_Geochemistry">Petrology and Geochemistry</a><script data-card-contents-for-ri="16937" type="text/json">{"id":16937,"name":"Petrology and Geochemistry","url":"https://www.academia.edu/Documents/in/Petrology_and_Geochemistry?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=12985051]'), 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Valencia","profile_url":"https://independent.academia.edu/JuanHenaoValencia?f_ri=15989","photo":"https://0.academia-photos.com/32196718/9622209/10717786/s65_juan.henao_valencia.jpg_oh_53fef6154aa31e22811aeea98746f5fd_oe_55e7a7be___gda___1441908115_2e08aa4eee063f219e99f69787dba03c"}],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology?f_ri=15989","nofollow":false},{"id":407,"name":"Geochemistry","url":"https://www.academia.edu/Documents/in/Geochemistry?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":16937,"name":"Petrology and Geochemistry","url":"https://www.academia.edu/Documents/in/Petrology_and_Geochemistry?f_ri=15989","nofollow":false},{"id":44747,"name":"Plate 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class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="3963215" href="https://unmsm.academia.edu/JuanJulioJulian">Juan Julio Julian</a><script data-card-contents-for-user="3963215" type="text/json">{"id":3963215,"first_name":"Juan Julio","last_name":"Julian","domain_name":"unmsm","page_name":"JuanJulioJulian","display_name":"Juan Julio Julian","profile_url":"https://unmsm.academia.edu/JuanJulioJulian?f_ri=15989","photo":"https://0.academia-photos.com/3963215/1489146/14279506/s65_juan_julio_julian.rosado.jpg"}</script></span></span></li><li class="js-paper-rank-work_25974988 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="25974988"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new 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fa-spin"></i></span><script>$(function () { var workId = 25974988; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=25974988]").text(description); $(".js-view-count-work_25974988").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_25974988").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="25974988"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">9</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="406" href="https://www.academia.edu/Documents/in/Geology">Geology</a>, <script data-card-contents-for-ri="406" type="text/json">{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="407" href="https://www.academia.edu/Documents/in/Geochemistry">Geochemistry</a>, <script data-card-contents-for-ri="407" type="text/json">{"id":407,"name":"Geochemistry","url":"https://www.academia.edu/Documents/in/Geochemistry?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="2404" href="https://www.academia.edu/Documents/in/Petrology">Petrology</a>, <script data-card-contents-for-ri="2404" type="text/json">{"id":2404,"name":"Petrology","url":"https://www.academia.edu/Documents/in/Petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="2635" href="https://www.academia.edu/Documents/in/Metamorphic_Petrology">Metamorphic Petrology</a><script data-card-contents-for-ri="2635" type="text/json">{"id":2635,"name":"Metamorphic Petrology","url":"https://www.academia.edu/Documents/in/Metamorphic_Petrology?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=25974988]'), work: {"id":25974988,"title":"Igneous Rocks and Processes","created_at":"2016-06-07T18:22:32.535-07:00","url":"https://www.academia.edu/25974988/Igneous_Rocks_and_Processes?f_ri=15989","dom_id":"work_25974988","summary":"A practical guide","downloadable_attachments":[{"id":46324816,"asset_id":25974988,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":3963215,"first_name":"Juan Julio","last_name":"Julian","domain_name":"unmsm","page_name":"JuanJulioJulian","display_name":"Juan Julio Julian","profile_url":"https://unmsm.academia.edu/JuanJulioJulian?f_ri=15989","photo":"https://0.academia-photos.com/3963215/1489146/14279506/s65_juan_julio_julian.rosado.jpg"}],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology?f_ri=15989","nofollow":false},{"id":407,"name":"Geochemistry","url":"https://www.academia.edu/Documents/in/Geochemistry?f_ri=15989","nofollow":false},{"id":2404,"name":"Petrology","url":"https://www.academia.edu/Documents/in/Petrology?f_ri=15989","nofollow":false},{"id":2635,"name":"Metamorphic Petrology","url":"https://www.academia.edu/Documents/in/Metamorphic_Petrology?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989"},{"id":16937,"name":"Petrology and Geochemistry","url":"https://www.academia.edu/Documents/in/Petrology_and_Geochemistry?f_ri=15989"},{"id":20615,"name":"Petroleum geology","url":"https://www.academia.edu/Documents/in/Petroleum_geology?f_ri=15989"},{"id":255222,"name":"Igneous and Metamorphic Petrology","url":"https://www.academia.edu/Documents/in/Igneous_and_Metamorphic_Petrology?f_ri=15989"},{"id":1406880,"name":"Petrloeum Engineering","url":"https://www.academia.edu/Documents/in/Petrloeum_Engineering?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_43320413" data-work_id="43320413" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/43320413/IGNEOUS_AND_METAMORPHIC_PETROLOGY_SECOND_EDITION">IGNEOUS AND METAMORPHIC PETROLOGY SECOND EDITION</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest">Myron G. Best<br />Brigham Young University</div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/43320413" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="f1ff1d42125c3362c502a2b8d452d1f3" rel="nofollow" data-download="{"attachment_id":63602605,"asset_id":43320413,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/63602605/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="36772459" href="https://independent.academia.edu/WillyTobing4">Willy Tobing</a><script data-card-contents-for-user="36772459" type="text/json">{"id":36772459,"first_name":"Willy","last_name":"Tobing","domain_name":"independent","page_name":"WillyTobing4","display_name":"Willy Tobing","profile_url":"https://independent.academia.edu/WillyTobing4?f_ri=15989","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_43320413 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="43320413"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 43320413, container: ".js-paper-rank-work_43320413", }); });</script></li><li class="js-percentile-work_43320413 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 43320413; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_43320413"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_43320413 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="43320413"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 43320413; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=43320413]").text(description); $(".js-view-count-work_43320413").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_43320413").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="43320413"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">2</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="406" href="https://www.academia.edu/Documents/in/Geology">Geology</a>, <script data-card-contents-for-ri="406" type="text/json">{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a><script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=43320413]'), work: {"id":43320413,"title":"IGNEOUS AND METAMORPHIC PETROLOGY SECOND EDITION","created_at":"2020-06-11T18:44:56.088-07:00","url":"https://www.academia.edu/43320413/IGNEOUS_AND_METAMORPHIC_PETROLOGY_SECOND_EDITION?f_ri=15989","dom_id":"work_43320413","summary":"Myron G. Best\nBrigham Young University","downloadable_attachments":[{"id":63602605,"asset_id":43320413,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":36772459,"first_name":"Willy","last_name":"Tobing","domain_name":"independent","page_name":"WillyTobing4","display_name":"Willy Tobing","profile_url":"https://independent.academia.edu/WillyTobing4?f_ri=15989","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_26509119" data-work_id="26509119" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/26509119/Encyclopedia_of_Volcanoes_pdf">Encyclopedia_of_Volcanoes.pdf</a></div></div><div class="u-pb4x u-mt3x"></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/26509119" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="2bca082742f55c9cd4b3744187ec96ba" rel="nofollow" data-download="{"attachment_id":46805834,"asset_id":26509119,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/46805834/download_file?st=MTczMjQ1OTQ0OSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="25280694" href="https://univ-oran.academia.edu/NoureddineChabani">Noureddine Chabani</a><script data-card-contents-for-user="25280694" type="text/json">{"id":25280694,"first_name":"Noureddine","last_name":"Chabani","domain_name":"univ-oran","page_name":"NoureddineChabani","display_name":"Noureddine Chabani","profile_url":"https://univ-oran.academia.edu/NoureddineChabani?f_ri=15989","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_26509119 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="26509119"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 26509119, container: ".js-paper-rank-work_26509119", }); });</script></li><li class="js-percentile-work_26509119 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 26509119; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_26509119"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_26509119 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="26509119"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 26509119; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=26509119]").text(description); $(".js-view-count-work_26509119").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_26509119").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="26509119"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">3</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="1370" href="https://www.academia.edu/Documents/in/Volcanology">Volcanology</a>, <script data-card-contents-for-ri="1370" type="text/json">{"id":1370,"name":"Volcanology","url":"https://www.academia.edu/Documents/in/Volcanology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="16937" href="https://www.academia.edu/Documents/in/Petrology_and_Geochemistry">Petrology and Geochemistry</a><script data-card-contents-for-ri="16937" type="text/json">{"id":16937,"name":"Petrology and Geochemistry","url":"https://www.academia.edu/Documents/in/Petrology_and_Geochemistry?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=26509119]'), work: {"id":26509119,"title":"Encyclopedia_of_Volcanoes.pdf","created_at":"2016-06-26T08:14:38.275-07:00","url":"https://www.academia.edu/26509119/Encyclopedia_of_Volcanoes_pdf?f_ri=15989","dom_id":"work_26509119","summary":null,"downloadable_attachments":[{"id":46805834,"asset_id":26509119,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":25280694,"first_name":"Noureddine","last_name":"Chabani","domain_name":"univ-oran","page_name":"NoureddineChabani","display_name":"Noureddine Chabani","profile_url":"https://univ-oran.academia.edu/NoureddineChabani?f_ri=15989","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":1370,"name":"Volcanology","url":"https://www.academia.edu/Documents/in/Volcanology?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":16937,"name":"Petrology and Geochemistry","url":"https://www.academia.edu/Documents/in/Petrology_and_Geochemistry?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_45602851" data-work_id="45602851" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/45602851/Strategies_for_helium_pycnometry_density_measurements_of_welded_ignimbritic_rocks">Strategies for helium pycnometry density measurements of welded ignimbritic rocks</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">This study is aimed at recognizing possible sources of dispersion of density measurements of welded ignimbritic rocks by helium pycnometer. The values of bulk density and solid fraction volume, useful for volcanological studies as well as... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_45602851" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">This study is aimed at recognizing possible sources of dispersion of density measurements of welded ignimbritic rocks by helium pycnometer. The values of bulk density and solid fraction volume, useful for volcanological studies as well as for a complete definition of the mechanical properties of these rocks, commonly used for present or historical buildings, are often tricky to obtain, due to the presence of micropores and the high tor-tuosity of the porous network. Three samples representative of different lithofacies of Miocene ignimbrites from San Pietro Island (SW Sardinia, Italy), have been used here to tune up a density measurement method. Basing on a statistical study of the density data derived from different analytical strategies, we propose a specific procedure for determining to measure density of welded ignimbritic rocks. Several measurements (runs) are performed on the undisturbed and on powered specimens of the three samples, using two different methods of gas-purging of the pycnometer: flow and pulse purging modes, respectively. The main factors that can produce a source of accidental errors are: uncontrolled fluctuations in temperature of the instrument, pollution of the sample (e.g., moisture), intrinsic petrophysical characteristics (e.g., pore tortuosity) of ignimbritic rocks. Conversely, the main systematic errors introduced in the measurements revealed to be related to the selected time and mode of gas-purging of the instrument during the first steps of the analysis. Using an appropriate sequence of contiguous cycles, accuracy and precision of data can be optimized, thus excluding systematic errors. The results show that in the first cycle, regardless of the purge time (or pulses), the values of density and standard deviations are always higher compared to the second and the third cycles. Basing on the analysis of our data, we propose that the better procedure to obtain an accuracy data is using 10-run cycles and considering the average value of the last seven measures.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/45602851" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="0f62cba3c0d645a901514e715ec8a8a9" rel="nofollow" data-download="{"attachment_id":66087169,"asset_id":45602851,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/66087169/download_file?st=MTczMjQ1OTQ1MCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="2205052" href="https://espol.academia.edu/MaurizioMulas">Maurizio Mulas</a><script data-card-contents-for-user="2205052" type="text/json">{"id":2205052,"first_name":"Maurizio","last_name":"Mulas","domain_name":"espol","page_name":"MaurizioMulas","display_name":"Maurizio Mulas","profile_url":"https://espol.academia.edu/MaurizioMulas?f_ri=15989","photo":"https://0.academia-photos.com/2205052/706612/4235809/s65_maurizio.mulas.jpg"}</script></span></span></li><li class="js-paper-rank-work_45602851 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="45602851"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 45602851, container: ".js-paper-rank-work_45602851", }); 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$(".js-view-count[data-work-id=45602851]").text(description); $(".js-view-count-work_45602851").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_45602851").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="45602851"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">4</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="1370" href="https://www.academia.edu/Documents/in/Volcanology">Volcanology</a>, <script data-card-contents-for-ri="1370" type="text/json">{"id":1370,"name":"Volcanology","url":"https://www.academia.edu/Documents/in/Volcanology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a>, <script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="151378" href="https://www.academia.edu/Documents/in/Helium">Helium</a>, <script data-card-contents-for-ri="151378" type="text/json">{"id":151378,"name":"Helium","url":"https://www.academia.edu/Documents/in/Helium?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="275969" href="https://www.academia.edu/Documents/in/Ignimbrite">Ignimbrite</a><script data-card-contents-for-ri="275969" type="text/json">{"id":275969,"name":"Ignimbrite","url":"https://www.academia.edu/Documents/in/Ignimbrite?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=45602851]'), work: {"id":45602851,"title":"Strategies for helium pycnometry density measurements of welded ignimbritic rocks","created_at":"2021-03-23T14:35:24.174-07:00","url":"https://www.academia.edu/45602851/Strategies_for_helium_pycnometry_density_measurements_of_welded_ignimbritic_rocks?f_ri=15989","dom_id":"work_45602851","summary":"This study is aimed at recognizing possible sources of dispersion of density measurements of welded ignimbritic rocks by helium pycnometer. The values of bulk density and solid fraction volume, useful for volcanological studies as well as for a complete definition of the mechanical properties of these rocks, commonly used for present or historical buildings, are often tricky to obtain, due to the presence of micropores and the high tor-tuosity of the porous network. Three samples representative of different lithofacies of Miocene ignimbrites from San Pietro Island (SW Sardinia, Italy), have been used here to tune up a density measurement method. Basing on a statistical study of the density data derived from different analytical strategies, we propose a specific procedure for determining to measure density of welded ignimbritic rocks. Several measurements (runs) are performed on the undisturbed and on powered specimens of the three samples, using two different methods of gas-purging of the pycnometer: flow and pulse purging modes, respectively. The main factors that can produce a source of accidental errors are: uncontrolled fluctuations in temperature of the instrument, pollution of the sample (e.g., moisture), intrinsic petrophysical characteristics (e.g., pore tortuosity) of ignimbritic rocks. Conversely, the main systematic errors introduced in the measurements revealed to be related to the selected time and mode of gas-purging of the instrument during the first steps of the analysis. Using an appropriate sequence of contiguous cycles, accuracy and precision of data can be optimized, thus excluding systematic errors. The results show that in the first cycle, regardless of the purge time (or pulses), the values of density and standard deviations are always higher compared to the second and the third cycles. Basing on the analysis of our data, we propose that the better procedure to obtain an accuracy data is using 10-run cycles and considering the average value of the last seven measures.","downloadable_attachments":[{"id":66087169,"asset_id":45602851,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":2205052,"first_name":"Maurizio","last_name":"Mulas","domain_name":"espol","page_name":"MaurizioMulas","display_name":"Maurizio Mulas","profile_url":"https://espol.academia.edu/MaurizioMulas?f_ri=15989","photo":"https://0.academia-photos.com/2205052/706612/4235809/s65_maurizio.mulas.jpg"}],"research_interests":[{"id":1370,"name":"Volcanology","url":"https://www.academia.edu/Documents/in/Volcanology?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":151378,"name":"Helium","url":"https://www.academia.edu/Documents/in/Helium?f_ri=15989","nofollow":false},{"id":275969,"name":"Ignimbrite","url":"https://www.academia.edu/Documents/in/Ignimbrite?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_32028690 coauthored" data-work_id="32028690" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/32028690/The_Geology_of_the_Tecolotlan_Graben_Jalisco_Mexico">The Geology of the Tecolotlan Graben, Jalisco, Mexico</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The Tecolotlan valley is a small graben ~110 km southwest of Guadalajara in the northeastern corner of the Jalisco block of west-central Mexico. The graben trends roughly north-south, is ~10 km wide and 20 km long, with ~500 m of... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_32028690" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The Tecolotlan valley is a small graben ~110 km southwest of Guadalajara in the northeastern corner of the Jalisco block of west-central Mexico. The graben trends roughly north-south, is ~10 km wide and 20 km long, with ~500 m of topographic relief. It is bounded to the east by a horst of Cretaceous (Albian/Cenomanian) limestone and to the west by a block of Late Cretaceous volcaniclastic sedimentary rocks, lava fl ows, and ignimbrites (one is 77 Ma). These volcanic rocks have chemical and mineralogical affi nities with continental volcanic arc sequences and record a history of arc volcanism and sedimentation during the Late Cretaceous. The sequence (over 300 m thick) consists of rhyolitic ash-fl ow tuffs and trachytic lava fl ows (lacking pillow structures) interbedded with volcanic debris fl ow deposits, arkosic fl uvial sand-stones, and volcanic conglomerates. This suggests that by the Late Cretaceous the continental arc was emergent, but probably still low-standing as it continued to accumulate sediment after the closure of the Arperos oceanic basin and accretion of the Guerrero arc terrane to Mexico. The Tecolotlan valley contains discontinuously deposited latest Miocene to Recent sediments that are important for their record of extension, magmatism, and diverse vertebrate fauna. Neogene basin fi ll is divided into older, Late Hemphillian age (ca. 5–4.8 Ma) sedimentary rocks (~50–60 m) that are mostly fi ne-grained fl uvial and overbank deposits, and younger, Late Blancan–Recent (younger than ca. 2.7 Ma) sediments (up to 30 m thick) that consist of coarse-grained, high-energy, fl uvial deposits. Intercalated with the basin-fi ll sedimentary rocks are isolated lava fl ows and pyro-clastic-fall beds. It appears that volcanism and extension in the Tecolotlan graben occurred simultaneously with a period of increased volcanic activity along the ESE-WNW–trending Tepic-Zacoalco graben. Although extension and volcanism ceased by</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/32028690" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="08be129e87dab4967ac82e9f28a13f03" rel="nofollow" data-download="{"attachment_id":52292474,"asset_id":32028690,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/52292474/download_file?st=MTczMjQ1OTQ1MCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="1260193" href="https://byu.academia.edu/BartKowallis">Bart Kowallis</a><script data-card-contents-for-user="1260193" type="text/json">{"id":1260193,"first_name":"Bart","last_name":"Kowallis","domain_name":"byu","page_name":"BartKowallis","display_name":"Bart Kowallis","profile_url":"https://byu.academia.edu/BartKowallis?f_ri=15989","photo":"https://0.academia-photos.com/1260193/461177/11953429/s65_bart.kowallis.jpg"}</script></span></span><span class="u-displayInlineBlock InlineList-item-text"> and <span class="u-textDecorationUnderline u-clickable InlineList-item-text js-work-more-authors-32028690">+2</span><div class="hidden js-additional-users-32028690"><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://byu.academia.edu/EricChristiansen">Eric H Christiansen</a></span></div><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://byu.academia.edu/KerynRoss">Keryn Ross</a></span></div></div></span><script>(function(){ var popoverSettings = { el: $('.js-work-more-authors-32028690'), placement: 'bottom', hide_delay: 200, html: true, content: function(){ return $('.js-additional-users-32028690').html(); } } new HoverPopover(popoverSettings); })();</script></li><li class="js-paper-rank-work_32028690 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="32028690"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 32028690, container: ".js-paper-rank-work_32028690", }); });</script></li><li class="js-percentile-work_32028690 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 32028690; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_32028690"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_32028690 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="32028690"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 32028690; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=32028690]").text(description); $(".js-view-count-work_32028690").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_32028690").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="32028690"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">8</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="420" href="https://www.academia.edu/Documents/in/Sedimentology">Sedimentology</a>, <script data-card-contents-for-ri="420" type="text/json">{"id":420,"name":"Sedimentology","url":"https://www.academia.edu/Documents/in/Sedimentology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="1034" href="https://www.academia.edu/Documents/in/Stratigraphy">Stratigraphy</a>, <script data-card-contents-for-ri="1034" type="text/json">{"id":1034,"name":"Stratigraphy","url":"https://www.academia.edu/Documents/in/Stratigraphy?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="10769" href="https://www.academia.edu/Documents/in/Tectonics">Tectonics</a>, <script data-card-contents-for-ri="10769" type="text/json">{"id":10769,"name":"Tectonics","url":"https://www.academia.edu/Documents/in/Tectonics?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="15989" href="https://www.academia.edu/Documents/in/Igneous_petrology">Igneous petrology</a><script data-card-contents-for-ri="15989" type="text/json">{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=32028690]'), work: {"id":32028690,"title":"The Geology of the Tecolotlan Graben, Jalisco, Mexico","created_at":"2017-03-24T11:00:06.707-07:00","url":"https://www.academia.edu/32028690/The_Geology_of_the_Tecolotlan_Graben_Jalisco_Mexico?f_ri=15989","dom_id":"work_32028690","summary":"The Tecolotlan valley is a small graben ~110 km southwest of Guadalajara in the northeastern corner of the Jalisco block of west-central Mexico. The graben trends roughly north-south, is ~10 km wide and 20 km long, with ~500 m of topographic relief. It is bounded to the east by a horst of Cretaceous (Albian/Cenomanian) limestone and to the west by a block of Late Cretaceous volcaniclastic sedimentary rocks, lava fl ows, and ignimbrites (one is 77 Ma). These volcanic rocks have chemical and mineralogical affi nities with continental volcanic arc sequences and record a history of arc volcanism and sedimentation during the Late Cretaceous. The sequence (over 300 m thick) consists of rhyolitic ash-fl ow tuffs and trachytic lava fl ows (lacking pillow structures) interbedded with volcanic debris fl ow deposits, arkosic fl uvial sand-stones, and volcanic conglomerates. This suggests that by the Late Cretaceous the continental arc was emergent, but probably still low-standing as it continued to accumulate sediment after the closure of the Arperos oceanic basin and accretion of the Guerrero arc terrane to Mexico. The Tecolotlan valley contains discontinuously deposited latest Miocene to Recent sediments that are important for their record of extension, magmatism, and diverse vertebrate fauna. Neogene basin fi ll is divided into older, Late Hemphillian age (ca. 5–4.8 Ma) sedimentary rocks (~50–60 m) that are mostly fi ne-grained fl uvial and overbank deposits, and younger, Late Blancan–Recent (younger than ca. 2.7 Ma) sediments (up to 30 m thick) that consist of coarse-grained, high-energy, fl uvial deposits. Intercalated with the basin-fi ll sedimentary rocks are isolated lava fl ows and pyro-clastic-fall beds. It appears that volcanism and extension in the Tecolotlan graben occurred simultaneously with a period of increased volcanic activity along the ESE-WNW–trending Tepic-Zacoalco graben. Although extension and volcanism ceased by","downloadable_attachments":[{"id":52292474,"asset_id":32028690,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":1260193,"first_name":"Bart","last_name":"Kowallis","domain_name":"byu","page_name":"BartKowallis","display_name":"Bart Kowallis","profile_url":"https://byu.academia.edu/BartKowallis?f_ri=15989","photo":"https://0.academia-photos.com/1260193/461177/11953429/s65_bart.kowallis.jpg"},{"id":76756,"first_name":"Eric","last_name":"Christiansen","domain_name":"byu","page_name":"EricChristiansen","display_name":"Eric H Christiansen","profile_url":"https://byu.academia.edu/EricChristiansen?f_ri=15989","photo":"https://0.academia-photos.com/76756/84665/284057/s65_eric.christiansen.jpg"},{"id":35044206,"first_name":"Keryn","last_name":"Ross","domain_name":"byu","page_name":"KerynRoss","display_name":"Keryn Ross","profile_url":"https://byu.academia.edu/KerynRoss?f_ri=15989","photo":"https://0.academia-photos.com/35044206/10198130/11380930/s65_keryn.ross.jpg"}],"research_interests":[{"id":420,"name":"Sedimentology","url":"https://www.academia.edu/Documents/in/Sedimentology?f_ri=15989","nofollow":false},{"id":1034,"name":"Stratigraphy","url":"https://www.academia.edu/Documents/in/Stratigraphy?f_ri=15989","nofollow":false},{"id":10769,"name":"Tectonics","url":"https://www.academia.edu/Documents/in/Tectonics?f_ri=15989","nofollow":false},{"id":15989,"name":"Igneous petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":43881,"name":"Mexico","url":"https://www.academia.edu/Documents/in/Mexico?f_ri=15989"},{"id":63798,"name":"Cretaceous","url":"https://www.academia.edu/Documents/in/Cretaceous?f_ri=15989"},{"id":82227,"name":"Geological mapping","url":"https://www.academia.edu/Documents/in/Geological_mapping?f_ri=15989"},{"id":146480,"name":"Cenozoic","url":"https://www.academia.edu/Documents/in/Cenozoic?f_ri=15989"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_40089680" data-work_id="40089680" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/40089680/Geochronological_and_geochemical_constraints_on_the_origin_of_the_Southeast_Anatolian_ophiolites_Turkey">Geochronological and geochemical constraints on the origin of the Southeast Anatolian ophiolites, Turkey</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The Southeast Anatolian ophiolites outcropping in the Southeast Anatolian Orogenic Belt (Southeast of Turkey) mark the closure of the southern branch of the Neotethys Ocean associated with the collision between the Arabian Plate and... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_40089680" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The Southeast Anatolian ophiolites outcropping in the Southeast Anatolian Orogenic Belt (Southeast of Turkey) mark the closure of the southern branch of the Neotethys Ocean associated with the collision between the Arabian Plate and Anatolian microplate. We present new geochemical, zircon U-Pb age, zircon Lu-Hf, and Sr-Nd isotopic data on the Southeast Anatolian Ophiolites to understand their formation ages, magma genesis, and geotectonic implications. The ophiolites, which are related to island arc igneous rocks, consist of mantle peridotites and crustal rocks (less dunite, gabbros, sheeted dykes, massive, and pillow basalts). The flat rare-earth element (REE) patterns, depletion in Nb and Ta, and enrichment in LILEs (Ba, Rb, Th, Sr, Pb) of gabbros suggest close similarities with very low Ti (boninitic) lavas found in the forearc regions. Using laser ablation inductively coupled plasma-mass spectrometry, zircon separated from leucogabbros, diabase dykes, and plagiogranites yield U-Pb ages of 92 and 83 Ma, which are interpreted to represent the formation ages of the ophiolites. The zircons in the gabbros and plagiogranites are dominated by positive εHf(t) values (between +3.1 and + 17.45) with a few negative εHf(t) values. High εHf(t) features are consistent with derivation from Mid-oceanic Ridge Basalt (MORB)-source mantle. The negative εHf(t) values of the zircons suggest the involvement of subducted sedimentary rocks. The southeast Anatolian ophiolites represent an SSZ-type ophiolite and are part of the Late Cretaceous oceanic lithosphere of the southern branch of the Neotethys Ocean that opened during the Late Triassic and closed during the Late Cretaceous.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/40089680" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="49894096ca3c94e34215372574f0f36a" rel="nofollow" data-download="{"attachment_id":60297791,"asset_id":40089680,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/60297791/download_file?st=MTczMjQ1OTQ1MCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="48559527" href="https://firat.academia.edu/AFeyziBing%C3%B6l">A. 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We present new geochemical, zircon U-Pb age, zircon Lu-Hf, and Sr-Nd isotopic data on the Southeast Anatolian Ophiolites to understand their formation ages, magma genesis, and geotectonic implications. The ophiolites, which are related to island arc igneous rocks, consist of mantle peridotites and crustal rocks (less dunite, gabbros, sheeted dykes, massive, and pillow basalts). The flat rare-earth element (REE) patterns, depletion in Nb and Ta, and enrichment in LILEs (Ba, Rb, Th, Sr, Pb) of gabbros suggest close similarities with very low Ti (boninitic) lavas found in the forearc regions. Using laser ablation inductively coupled plasma-mass spectrometry, zircon separated from leucogabbros, diabase dykes, and plagiogranites yield U-Pb ages of 92 and 83 Ma, which are interpreted to represent the formation ages of the ophiolites. The zircons in the gabbros and plagiogranites are dominated by positive εHf(t) values (between +3.1 and + 17.45) with a few negative εHf(t) values. High εHf(t) features are consistent with derivation from Mid-oceanic Ridge Basalt (MORB)-source mantle. The negative εHf(t) values of the zircons suggest the involvement of subducted sedimentary rocks. The southeast Anatolian ophiolites represent an SSZ-type ophiolite and are part of the Late Cretaceous oceanic lithosphere of the southern branch of the Neotethys Ocean that opened during the Late Triassic and closed during the Late Cretaceous.","downloadable_attachments":[{"id":60297791,"asset_id":40089680,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":48559527,"first_name":"A. Feyzi","last_name":"Bingöl","domain_name":"firat","page_name":"AFeyziBingöl","display_name":"A. 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petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false}</script><a class="InlineList-item-text" data-has-card-for-ri="199696" href="https://www.academia.edu/Documents/in/Igneous_petrogenesis">Igneous petrogenesis</a><script data-card-contents-for-ri="199696" type="text/json">{"id":199696,"name":"Igneous petrogenesis","url":"https://www.academia.edu/Documents/in/Igneous_petrogenesis?f_ri=15989","nofollow":false}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=43320435]'), work: {"id":43320435,"title":"IGNEOUS PETROGENESIS","created_at":"2020-06-11T18:53:06.360-07:00","url":"https://www.academia.edu/43320435/IGNEOUS_PETROGENESIS?f_ri=15989","dom_id":"work_43320435","summary":"Author:\nMarjorie Wilson\nDepartment of Earch Sciences, University of 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petrology","url":"https://www.academia.edu/Documents/in/Igneous_petrology?f_ri=15989","nofollow":false},{"id":255222,"name":"Igneous and Metamorphic Petrology","url":"https://www.academia.edu/Documents/in/Igneous_and_Metamorphic_Petrology?f_ri=15989","nofollow":false},{"id":740782,"name":"Igneous Petrography","url":"https://www.academia.edu/Documents/in/Igneous_Petrography?f_ri=15989","nofollow":false}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_43025589" data-work_id="43025589" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/43025589/A_REPORT_OF_THE_GEOLOGICAL_FIELD_SCHOOL_AT_OYO_WEST_AND_EAST_LGAs_OYO_STATE_AND_IWO_LGA_OSUN_STATE_SOUTHWESTERN_NIGERIA">A REPORT OF THE GEOLOGICAL FIELD SCHOOL AT OYO WEST AND EAST LGAs (OYO STATE), AND IWO LGA (OSUN STATE), SOUTHWESTERN NIGERIA.</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Geological fieldwork carried out at the Idi-Orupa, Alagbon, Akoda, Idi-Aka, and Foritaje environs of Oyo and Osun states reported the lithologies, structures, and the economic potentials of the over 25 sq. Km land area. The mapped area... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_43025589" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Geological fieldwork carried out at the Idi-Orupa, Alagbon, Akoda, Idi-Aka, and Foritaje environs of Oyo and Osun states reported the lithologies, structures, and the economic potentials of the over 25 sq. Km land area. The mapped area (longitudes 4 deg 0’ 0’’ E and 4 deg 3’ 30’’ E and latitudes 7 deg 41’ 15’’ N and 7 deg 45’ 00’’ N) is part of the basement complex of Southwestern Nigeria. Quartzite and quartz schists cover seventy percent of this area. Other dominant rock types are migmatite, banded, and granite gneisses (migmatites and gneisses make up 25 %), granite (4 %), and amphibolite (1%) respectively.  The general strike of the rocks in this area is NE-SW. Structures such as quartzofeldspathic veins, ptygmatic folds, fractures (mostly discordant), and faults (normal and dextral types) populate the area. The area bears imprints of the Pan-African orogeny. Also, the geological history of the area suggests that the rocks in the area originated from prograding regional metamorphism of the sedimentary rocks (sandstone and shale) and volcanics (such as basaltic bombs). The presence of numerous healed veins across the major fracture zone in the area suggests the presence of hydrothermal deposits. The gneisses and gneisses are useful as aggregates and aesthetics in the construction industry. With the presence of amphibolite, ores associated with ferromagnesian minerals (chromite, niccolite, and magnetite) may be found under detailed exploration.  <br /><br /><br />Note: The fieldwork was carried out (between July and August 2018) as a course (GEY 781) in the Master's degree program at the Department of Geology, University of Ibadan.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/43025589" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="8e9e7f6d700dac7791bf05ade91df894" rel="nofollow" data-download="{"attachment_id":63289099,"asset_id":43025589,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/63289099/download_file?st=MTczMjQ1OTQ1MCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="50974258" href="https://ui-edu-ng.academia.edu/TimileyinAyomideOlanipekun">Timileyin Ayomide Olanipekun</a><script data-card-contents-for-user="50974258" type="text/json">{"id":50974258,"first_name":"Timileyin Ayomide","last_name":"Olanipekun","domain_name":"ui-edu-ng","page_name":"TimileyinAyomideOlanipekun","display_name":"Timileyin Ayomide Olanipekun","profile_url":"https://ui-edu-ng.academia.edu/TimileyinAyomideOlanipekun?f_ri=15989","photo":"https://0.academia-photos.com/50974258/13499017/14686874/s65_timileyin_ayomide.olanipekun.jpg"}</script></span></span></li><li class="js-paper-rank-work_43025589 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="43025589"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 43025589, container: ".js-paper-rank-work_43025589", }); 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The presence of numerous healed veins across the major fracture zone in the area suggests the presence of hydrothermal deposits. The gneisses and gneisses are useful as aggregates and aesthetics in the construction industry. With the presence of amphibolite, ores associated with ferromagnesian minerals (chromite, niccolite, and magnetite) may be found under detailed exploration. \n\n\nNote: The fieldwork was carried out (between July and August 2018) as a course (GEY 781) in the Master's degree program at the Department of Geology, University of Ibadan.","downloadable_attachments":[{"id":63289099,"asset_id":43025589,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":50974258,"first_name":"Timileyin Ayomide","last_name":"Olanipekun","domain_name":"ui-edu-ng","page_name":"TimileyinAyomideOlanipekun","display_name":"Timileyin Ayomide 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data-work_id="9702225" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/9702225/Rocks_and_Minerals">Rocks and Minerals</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest">Monica Price<br />Kevin Walsh<br /><br />What are Minerals?<br />What are Rocks?<br />Rock Identification<br />Mineral Identification</div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/9702225" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li 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