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class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/126021048/Trace_Element_Geochemistry_of_Tholeiitic_Basalts_from_Site_433C_Suiko_Seamount"><img alt="Research paper thumbnail of Trace-Element Geochemistry of Tholeiitic Basalts from Site 433C, Suiko Seamount" class="work-thumbnail" src="https://attachments.academia-assets.com/119961540/thumbnails/1.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/126021048/Trace_Element_Geochemistry_of_Tholeiitic_Basalts_from_Site_433C_Suiko_Seamount">Trace-Element Geochemistry of Tholeiitic Basalts from Site 433C, Suiko Seamount</a></div><div class="wp-workCard_item"><span>U.S. Government Printing Office eBooks</span><span>, Sep 1, 1980</span></div><div 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data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">A depth transect of deep-sea bamboo corals along the California margin provides evidence that coral strontium to calcium ratios (Sr/Ca[coral]) record seawater Sr/Ca ratios (Sr/Ca[sw]). A calibration was constructed utilizing Sr/Ca[coral] ratios and previously published Pacific Sr/Ca[sw] data (R**2 = 0.53, n = 12, p &lt; 0.01): Sr/Ca[coral] (mmol/mol) = 4.62*Sr/Ca[sw] (mmol/mol) - 36.64. Sr/Ca[sw] is ultimately governed by the remineralization of Sr-containing shells of surface water-derived marine organisms (e.g., Acantharia) at intermediate water depths. California margin Sr/Cacoral records from 792 and 1295 m document fluctuations in Sr/Ca[sw] that appear decadal-scale. 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Clague","url":"https://independent.academia.edu/DavidClague"},"attachments":[{"id":119961512,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/119961512/thumbnails/1.jpg","file_name":"plate-1.pdf","download_url":"https://www.academia.edu/attachments/119961512/download_file?st=MTczMzM0NzczNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Preliminary_geologic_map_of_Makalawena_Q.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/119961512/plate-1-libre.pdf?1733163528=\u0026response-content-disposition=attachment%3B+filename%3DPreliminary_geologic_map_of_Makalawena_Q.pdf\u0026Expires=1733351334\u0026Signature=RjaCoqPCjTaTEaLELFkFaK2YSL-x~0Ei-XIAs-Co9hEZB7nMyX8gzpjGVPfw5nNUbBlkQa6LRax~VxGi7vfLzGr1g7iF3srBEQg36Dhcg-nZUjX~KBfLpaVmZ25TK1LSxXVRWhYxY3tQl~vVBkarBOeaPMCspfwr5Sy5XGe6W8~puRLJ1PTUOj0pTE5UphM3WJMhZJtHxSfsZnGDSwuSuMkTDrCYzzr61uOLqHi-v9hwMAa0Fqwz3JXzsXmyt0m8INaWx5XSt3x8Mbz2Z8~lzM2eRy3pKoMgZ5pj09eU137NaYx7dkDU8eTVDC19dejHj39rMndMYzobTK1wZrIpRA__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology"},{"id":188988,"name":"Geologic map","url":"https://www.academia.edu/Documents/in/Geologic_map"}],"urls":[{"id":45890626,"url":"https://doi.org/10.3133/ofr85595"}]}, dispatcherData: dispatcherData }); $(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="126020986"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/126020986/Evolution_of_Hawaiian_Volcano_Magmatic_Plumbing_System_and_Implications_for_Melt_Edifice_and_Melt_Lithosphere_Interaction_Constraints_from_Hual%C4%81lai_Xenoliths"><img alt="Research paper thumbnail of Evolution of Hawaiian Volcano Magmatic Plumbing System and Implications for Melt/Edifice and Melt/Lithosphere Interaction: Constraints from Hualālai Xenoliths" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/126020986/Evolution_of_Hawaiian_Volcano_Magmatic_Plumbing_System_and_Implications_for_Melt_Edifice_and_Melt_Lithosphere_Interaction_Constraints_from_Hual%C4%81lai_Xenoliths">Evolution of Hawaiian Volcano Magmatic Plumbing System and Implications for Melt/Edifice and Melt/Lithosphere Interaction: Constraints from Hualālai Xenoliths</a></div><div class="wp-workCard_item"><span>Journal of Petrology</span><span>, Sep 1, 2022</span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">The evolution of Hawaiian magmatic storage and transport systems in response to variations in mag...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">The evolution of Hawaiian magmatic storage and transport systems in response to variations in magma supply over the course of volcano lifespan can have a significant influence on the type and amount of wallrock material that is assimilated by ponded melts prior to eruption. Understanding this plumbing evolution is therefore critical for evaluating the extent to which such melt/wallrock interaction affects the geochemical signals of Hawaiian basalts. We have examined mineral major and trace element and Sr-Nd-Pb-Hf-Os-O isotope variations in a suite of cumulate and lower Pacific crust xenoliths from the Ka‘ūpūlehu flow, Hualālai Volcano, Hawai‘i in order to constrain the depths of magma storage during Hualālai shield- and post-shield-stage volcanism and the effects of edifice and Pacific crust assimilation. Xenoliths range from 1- and 2-pyroxene gabbros to dunites. Pressures of equilibration for gabbroic and pyroxenitic xenoliths, calculated using two-pyroxene and clinopyroxene-only thermobarometry, suggest that most xenoliths, including both shield- and post-shield-stage cumulates, formed within the Pacific lower crust, at pressures &amp;gt;0.24 GPa. However, two gabbros record lower equilibration pressures (&amp;lt;0.2 GPa) and may have formed within the volcanic edifice. Dunite xenoliths also appear to have formed at shallower depths than most gabbro and pyroxenite xenoliths, inconsistent with a single liquid line of descent. These results indicate that, although shallow (intra-edifice) magma chambers are active during Hawaiian shield-stage volcanism, some magmas also pond and fractionate within or near the base of the Pacific crust during the shield stage. Mass and energy constrained geochemical modeling suggests that ponded melts are likely to assimilate significant quantities of wallrock material, with the mass ratio of assimilated material to crystals fractionated approaching one, regardless of depth of ponding. Elevated 187Os/188Os in some evolved post-shield-derived xenoliths are consistent with assimilation of lower Pacific crust, and low δ18O in xenoliths recording shallow equilibration pressures are consistent with edifice assimilation. However, the effects of assimilation on other radiogenic isotopes appear to be limited in most xenoliths and, by inference, in erupted basalts. Melt–wallrock reaction also appears to have modified the composition of the local Pacific crust. Although plagioclase from the lower oceanic crust record unradiogenic Sr-isotopes similar to mid-ocean ridge basalt (MORB), pyroxene Sr-Nd-Hf and whole-rock Os-isotopes have been variably affected by interaction with Hawaiian melts, resulting in a hybrid isotopic composition intermediate between MORB and Hawaiian shield-stage basalts. These hybrid isotopic compositions are qualitatively similar to Hawaiian rejuvenation-stage basalts. Similar hybridization is likely to have altered the isotopic composition of the Pacific lithospheric mantle. Therefore, Pb-isotope differences between MORB and rejuvenation-stage Hawaiian melts do not preclude melt generation within the Pacific lithosphere or asthenosphere. The isotopic signatures of rejuvenation-stage basalts may represent a unique depleted component within the Hawaiian plume, as suggested by previous studies, but requires additional investigation in light of these results.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="126020986"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="126020986"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 126020986; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=126020986]").text(description); $(".js-view-count[data-work-id=126020986]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 126020986; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='126020986']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 126020986, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (false){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "-1" } } $('.js-work-strip[data-work-id=126020986]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":126020986,"title":"Evolution of Hawaiian Volcano Magmatic Plumbing System and Implications for Melt/Edifice and Melt/Lithosphere Interaction: Constraints from Hualālai Xenoliths","translated_title":"","metadata":{"abstract":"The evolution of Hawaiian magmatic storage and transport systems in response to variations in magma supply over the course of volcano lifespan can have a significant influence on the type and amount of wallrock material that is assimilated by ponded melts prior to eruption. Understanding this plumbing evolution is therefore critical for evaluating the extent to which such melt/wallrock interaction affects the geochemical signals of Hawaiian basalts. We have examined mineral major and trace element and Sr-Nd-Pb-Hf-Os-O isotope variations in a suite of cumulate and lower Pacific crust xenoliths from the Ka‘ūpūlehu flow, Hualālai Volcano, Hawai‘i in order to constrain the depths of magma storage during Hualālai shield- and post-shield-stage volcanism and the effects of edifice and Pacific crust assimilation. Xenoliths range from 1- and 2-pyroxene gabbros to dunites. Pressures of equilibration for gabbroic and pyroxenitic xenoliths, calculated using two-pyroxene and clinopyroxene-only thermobarometry, suggest that most xenoliths, including both shield- and post-shield-stage cumulates, formed within the Pacific lower crust, at pressures \u0026amp;gt;0.24 GPa. However, two gabbros record lower equilibration pressures (\u0026amp;lt;0.2 GPa) and may have formed within the volcanic edifice. Dunite xenoliths also appear to have formed at shallower depths than most gabbro and pyroxenite xenoliths, inconsistent with a single liquid line of descent. These results indicate that, although shallow (intra-edifice) magma chambers are active during Hawaiian shield-stage volcanism, some magmas also pond and fractionate within or near the base of the Pacific crust during the shield stage. Mass and energy constrained geochemical modeling suggests that ponded melts are likely to assimilate significant quantities of wallrock material, with the mass ratio of assimilated material to crystals fractionated approaching one, regardless of depth of ponding. Elevated 187Os/188Os in some evolved post-shield-derived xenoliths are consistent with assimilation of lower Pacific crust, and low δ18O in xenoliths recording shallow equilibration pressures are consistent with edifice assimilation. However, the effects of assimilation on other radiogenic isotopes appear to be limited in most xenoliths and, by inference, in erupted basalts. Melt–wallrock reaction also appears to have modified the composition of the local Pacific crust. Although plagioclase from the lower oceanic crust record unradiogenic Sr-isotopes similar to mid-ocean ridge basalt (MORB), pyroxene Sr-Nd-Hf and whole-rock Os-isotopes have been variably affected by interaction with Hawaiian melts, resulting in a hybrid isotopic composition intermediate between MORB and Hawaiian shield-stage basalts. These hybrid isotopic compositions are qualitatively similar to Hawaiian rejuvenation-stage basalts. Similar hybridization is likely to have altered the isotopic composition of the Pacific lithospheric mantle. Therefore, Pb-isotope differences between MORB and rejuvenation-stage Hawaiian melts do not preclude melt generation within the Pacific lithosphere or asthenosphere. The isotopic signatures of rejuvenation-stage basalts may represent a unique depleted component within the Hawaiian plume, as suggested by previous studies, but requires additional investigation in light of these results.","publisher":"Oxford University Press","publication_date":{"day":1,"month":9,"year":2022,"errors":{}},"publication_name":"Journal of Petrology"},"translated_abstract":"The evolution of Hawaiian magmatic storage and transport systems in response to variations in magma supply over the course of volcano lifespan can have a significant influence on the type and amount of wallrock material that is assimilated by ponded melts prior to eruption. Understanding this plumbing evolution is therefore critical for evaluating the extent to which such melt/wallrock interaction affects the geochemical signals of Hawaiian basalts. We have examined mineral major and trace element and Sr-Nd-Pb-Hf-Os-O isotope variations in a suite of cumulate and lower Pacific crust xenoliths from the Ka‘ūpūlehu flow, Hualālai Volcano, Hawai‘i in order to constrain the depths of magma storage during Hualālai shield- and post-shield-stage volcanism and the effects of edifice and Pacific crust assimilation. Xenoliths range from 1- and 2-pyroxene gabbros to dunites. Pressures of equilibration for gabbroic and pyroxenitic xenoliths, calculated using two-pyroxene and clinopyroxene-only thermobarometry, suggest that most xenoliths, including both shield- and post-shield-stage cumulates, formed within the Pacific lower crust, at pressures \u0026amp;gt;0.24 GPa. However, two gabbros record lower equilibration pressures (\u0026amp;lt;0.2 GPa) and may have formed within the volcanic edifice. Dunite xenoliths also appear to have formed at shallower depths than most gabbro and pyroxenite xenoliths, inconsistent with a single liquid line of descent. These results indicate that, although shallow (intra-edifice) magma chambers are active during Hawaiian shield-stage volcanism, some magmas also pond and fractionate within or near the base of the Pacific crust during the shield stage. Mass and energy constrained geochemical modeling suggests that ponded melts are likely to assimilate significant quantities of wallrock material, with the mass ratio of assimilated material to crystals fractionated approaching one, regardless of depth of ponding. Elevated 187Os/188Os in some evolved post-shield-derived xenoliths are consistent with assimilation of lower Pacific crust, and low δ18O in xenoliths recording shallow equilibration pressures are consistent with edifice assimilation. However, the effects of assimilation on other radiogenic isotopes appear to be limited in most xenoliths and, by inference, in erupted basalts. Melt–wallrock reaction also appears to have modified the composition of the local Pacific crust. Although plagioclase from the lower oceanic crust record unradiogenic Sr-isotopes similar to mid-ocean ridge basalt (MORB), pyroxene Sr-Nd-Hf and whole-rock Os-isotopes have been variably affected by interaction with Hawaiian melts, resulting in a hybrid isotopic composition intermediate between MORB and Hawaiian shield-stage basalts. These hybrid isotopic compositions are qualitatively similar to Hawaiian rejuvenation-stage basalts. Similar hybridization is likely to have altered the isotopic composition of the Pacific lithospheric mantle. Therefore, Pb-isotope differences between MORB and rejuvenation-stage Hawaiian melts do not preclude melt generation within the Pacific lithosphere or asthenosphere. The isotopic signatures of rejuvenation-stage basalts may represent a unique depleted component within the Hawaiian plume, as suggested by previous studies, but requires additional investigation in light of these results.","internal_url":"https://www.academia.edu/126020986/Evolution_of_Hawaiian_Volcano_Magmatic_Plumbing_System_and_Implications_for_Melt_Edifice_and_Melt_Lithosphere_Interaction_Constraints_from_Hual%C4%81lai_Xenoliths","translated_internal_url":"","created_at":"2024-12-02T10:05:19.950-08:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":32506910,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[],"slug":"Evolution_of_Hawaiian_Volcano_Magmatic_Plumbing_System_and_Implications_for_Melt_Edifice_and_Melt_Lithosphere_Interaction_Constraints_from_Hualālai_Xenoliths","translated_slug":"","page_count":null,"language":"en","content_type":"Work","owner":{"id":32506910,"first_name":"David","middle_initials":null,"last_name":"Clague","page_name":"DavidClague","domain_name":"independent","created_at":"2015-06-24T12:33:45.015-07:00","display_name":"David Clague","url":"https://independent.academia.edu/DavidClague"},"attachments":[],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology"},{"id":407,"name":"Geochemistry","url":"https://www.academia.edu/Documents/in/Geochemistry"},{"id":2404,"name":"Petrology","url":"https://www.academia.edu/Documents/in/Petrology"},{"id":108863,"name":"Volcano","url":"https://www.academia.edu/Documents/in/Volcano"},{"id":197592,"name":"Magma","url":"https://www.academia.edu/Documents/in/Magma"},{"id":205582,"name":"Xenolith","url":"https://www.academia.edu/Documents/in/Xenolith"},{"id":415322,"name":"Magma Chamber","url":"https://www.academia.edu/Documents/in/Magma_Chamber"},{"id":418452,"name":"Crust","url":"https://www.academia.edu/Documents/in/Crust"}],"urls":[{"id":45890621,"url":"https://doi.org/10.1093/petrology/egac091"}]}, dispatcherData: dispatcherData }); $(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="126020981"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/126020981/High_resolution_AUV_mapping_and_ROV_sampling_of_mid_ocean_ridges"><img alt="Research paper thumbnail of High-resolution AUV mapping and ROV sampling of mid-ocean ridges" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/126020981/High_resolution_AUV_mapping_and_ROV_sampling_of_mid_ocean_ridges">High-resolution AUV mapping and ROV sampling of mid-ocean ridges</a></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Since the mid-1980s, eight eruptions have occurred along the Juan de Fuca and Gorda Ridges in the...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Since the mid-1980s, eight eruptions have occurred along the Juan de Fuca and Gorda Ridges in the NE Pacific. MBARI has examined seven of them, including the April 2015 eruption at Axial Seamount, using autonomous underwater vehicles (AUVs) to map at 1-m lateral resolution and remotely operated vehicles (ROVs) to observe and sample the lava flows and hydrothermal deposits. We have done similar work on the Alarcon Rise at the mouth of the Gulf of California, where all eruptions pre-date our studies of the ridge system, but are recent enough to host impressive active hydrothermal systems.AUV sonar data were processed with MB-System software and the resulting maps were brought into a geographical information system (GIS) for display and analysis. The highresolution AUV maps were used at sea as basemaps in a real-time GIS to guide our ROV dives with greater efficiency than possible before. From the maps and observations, we defined lava flow boundaries and channel systems, assessed fault activity, calculated flow sizes, evaluated age relationships between flows, and then sampled lavas for chemistry. Those data were coupled with age dates from sediment samples to place changes in eruption styles, lava chemistry, and hydrothermal systems on the ridges into the previously elusive framework of time. Using these tools, we have constructed geologic field maps and volcanic histories of the spreading ridges, much like volcanologists do on land, but all unprecedented for submarine volcanoes. The synergistic high-resolution mapping and targeted ROV sampling of the ridges has permitted better understanding of when, how, how much, and how often spreading ridges erupt, and how their magmatic and hydrothermal systems change over time.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="126020981"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="126020981"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 126020981; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=126020981]").text(description); $(".js-view-count[data-work-id=126020981]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 126020981; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='126020981']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 126020981, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (false){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "-1" } } $('.js-work-strip[data-work-id=126020981]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":126020981,"title":"High-resolution AUV mapping and ROV sampling of mid-ocean ridges","translated_title":"","metadata":{"abstract":"Since the mid-1980s, eight eruptions have occurred along the Juan de Fuca and Gorda Ridges in the NE Pacific. MBARI has examined seven of them, including the April 2015 eruption at Axial Seamount, using autonomous underwater vehicles (AUVs) to map at 1-m lateral resolution and remotely operated vehicles (ROVs) to observe and sample the lava flows and hydrothermal deposits. We have done similar work on the Alarcon Rise at the mouth of the Gulf of California, where all eruptions pre-date our studies of the ridge system, but are recent enough to host impressive active hydrothermal systems.AUV sonar data were processed with MB-System software and the resulting maps were brought into a geographical information system (GIS) for display and analysis. The highresolution AUV maps were used at sea as basemaps in a real-time GIS to guide our ROV dives with greater efficiency than possible before. From the maps and observations, we defined lava flow boundaries and channel systems, assessed fault activity, calculated flow sizes, evaluated age relationships between flows, and then sampled lavas for chemistry. Those data were coupled with age dates from sediment samples to place changes in eruption styles, lava chemistry, and hydrothermal systems on the ridges into the previously elusive framework of time. Using these tools, we have constructed geologic field maps and volcanic histories of the spreading ridges, much like volcanologists do on land, but all unprecedented for submarine volcanoes. The synergistic high-resolution mapping and targeted ROV sampling of the ridges has permitted better understanding of when, how, how much, and how often spreading ridges erupt, and how their magmatic and hydrothermal systems change over time.","publication_date":{"day":1,"month":9,"year":2016,"errors":{}}},"translated_abstract":"Since the mid-1980s, eight eruptions have occurred along the Juan de Fuca and Gorda Ridges in the NE Pacific. MBARI has examined seven of them, including the April 2015 eruption at Axial Seamount, using autonomous underwater vehicles (AUVs) to map at 1-m lateral resolution and remotely operated vehicles (ROVs) to observe and sample the lava flows and hydrothermal deposits. We have done similar work on the Alarcon Rise at the mouth of the Gulf of California, where all eruptions pre-date our studies of the ridge system, but are recent enough to host impressive active hydrothermal systems.AUV sonar data were processed with MB-System software and the resulting maps were brought into a geographical information system (GIS) for display and analysis. The highresolution AUV maps were used at sea as basemaps in a real-time GIS to guide our ROV dives with greater efficiency than possible before. From the maps and observations, we defined lava flow boundaries and channel systems, assessed fault activity, calculated flow sizes, evaluated age relationships between flows, and then sampled lavas for chemistry. Those data were coupled with age dates from sediment samples to place changes in eruption styles, lava chemistry, and hydrothermal systems on the ridges into the previously elusive framework of time. Using these tools, we have constructed geologic field maps and volcanic histories of the spreading ridges, much like volcanologists do on land, but all unprecedented for submarine volcanoes. The synergistic high-resolution mapping and targeted ROV sampling of the ridges has permitted better understanding of when, how, how much, and how often spreading ridges erupt, and how their magmatic and hydrothermal systems change over time.","internal_url":"https://www.academia.edu/126020981/High_resolution_AUV_mapping_and_ROV_sampling_of_mid_ocean_ridges","translated_internal_url":"","created_at":"2024-12-02T10:05:12.720-08:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":32506910,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[],"slug":"High_resolution_AUV_mapping_and_ROV_sampling_of_mid_ocean_ridges","translated_slug":"","page_count":null,"language":"en","content_type":"Work","owner":{"id":32506910,"first_name":"David","middle_initials":null,"last_name":"Clague","page_name":"DavidClague","domain_name":"independent","created_at":"2015-06-24T12:33:45.015-07:00","display_name":"David 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href="https://www.academia.edu/126021044/Age_determination_and_geochemistry_of_corals_from_the_North_Pacific"><img alt="Research paper thumbnail of Age determination and geochemistry of corals from the North Pacific" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/126021044/Age_determination_and_geochemistry_of_corals_from_the_North_Pacific">Age determination and geochemistry of corals from the North Pacific</a></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">A depth transect of deep-sea bamboo corals along the California margin provides evidence that cor...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">A depth transect of deep-sea bamboo corals along the California margin provides evidence that coral strontium to calcium ratios (Sr/Ca[coral]) record seawater Sr/Ca ratios (Sr/Ca[sw]). A calibration was constructed utilizing Sr/Ca[coral] ratios and previously published Pacific Sr/Ca[sw] data (R**2 = 0.53, n = 12, p &lt; 0.01): Sr/Ca[coral] (mmol/mol) = 4.62*Sr/Ca[sw] (mmol/mol) - 36.64. Sr/Ca[sw] is ultimately governed by the remineralization of Sr-containing shells of surface water-derived marine organisms (e.g., Acantharia) at intermediate water depths. California margin Sr/Cacoral records from 792 and 1295 m document fluctuations in Sr/Ca[sw] that appear decadal-scale. These results suggest that Sr/Casw may not be as stable as previously assumed and may be influenced by surface productivity on short timescales.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="126021044"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="126021044"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 126021044; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=126021044]").text(description); $(".js-view-count[data-work-id=126021044]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 126021044; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='126021044']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 126021044, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (false){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "-1" } } $('.js-work-strip[data-work-id=126021044]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":126021044,"title":"Age determination and geochemistry of corals from the North Pacific","translated_title":"","metadata":{"abstract":"A depth transect of deep-sea bamboo corals along the California margin provides evidence that coral strontium to calcium ratios (Sr/Ca[coral]) record seawater Sr/Ca ratios (Sr/Ca[sw]). 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Clague","url":"https://independent.academia.edu/DavidClague"},"attachments":[{"id":119961512,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/119961512/thumbnails/1.jpg","file_name":"plate-1.pdf","download_url":"https://www.academia.edu/attachments/119961512/download_file?st=MTczMzM0NzczNCw4LjIyMi4yMDguMTQ2&st=MTczMzM0NzczNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Preliminary_geologic_map_of_Makalawena_Q.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/119961512/plate-1-libre.pdf?1733163528=\u0026response-content-disposition=attachment%3B+filename%3DPreliminary_geologic_map_of_Makalawena_Q.pdf\u0026Expires=1733351334\u0026Signature=RjaCoqPCjTaTEaLELFkFaK2YSL-x~0Ei-XIAs-Co9hEZB7nMyX8gzpjGVPfw5nNUbBlkQa6LRax~VxGi7vfLzGr1g7iF3srBEQg36Dhcg-nZUjX~KBfLpaVmZ25TK1LSxXVRWhYxY3tQl~vVBkarBOeaPMCspfwr5Sy5XGe6W8~puRLJ1PTUOj0pTE5UphM3WJMhZJtHxSfsZnGDSwuSuMkTDrCYzzr61uOLqHi-v9hwMAa0Fqwz3JXzsXmyt0m8INaWx5XSt3x8Mbz2Z8~lzM2eRy3pKoMgZ5pj09eU137NaYx7dkDU8eTVDC19dejHj39rMndMYzobTK1wZrIpRA__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology"},{"id":188988,"name":"Geologic map","url":"https://www.academia.edu/Documents/in/Geologic_map"}],"urls":[{"id":45890626,"url":"https://doi.org/10.3133/ofr85595"}]}, dispatcherData: dispatcherData }); $(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="126020986"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/126020986/Evolution_of_Hawaiian_Volcano_Magmatic_Plumbing_System_and_Implications_for_Melt_Edifice_and_Melt_Lithosphere_Interaction_Constraints_from_Hual%C4%81lai_Xenoliths"><img alt="Research paper thumbnail of Evolution of Hawaiian Volcano Magmatic Plumbing System and Implications for Melt/Edifice and Melt/Lithosphere Interaction: Constraints from Hualālai Xenoliths" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/126020986/Evolution_of_Hawaiian_Volcano_Magmatic_Plumbing_System_and_Implications_for_Melt_Edifice_and_Melt_Lithosphere_Interaction_Constraints_from_Hual%C4%81lai_Xenoliths">Evolution of Hawaiian Volcano Magmatic Plumbing System and Implications for Melt/Edifice and Melt/Lithosphere Interaction: Constraints from Hualālai Xenoliths</a></div><div class="wp-workCard_item"><span>Journal of Petrology</span><span>, Sep 1, 2022</span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">The evolution of Hawaiian magmatic storage and transport systems in response to variations in mag...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">The evolution of Hawaiian magmatic storage and transport systems in response to variations in magma supply over the course of volcano lifespan can have a significant influence on the type and amount of wallrock material that is assimilated by ponded melts prior to eruption. Understanding this plumbing evolution is therefore critical for evaluating the extent to which such melt/wallrock interaction affects the geochemical signals of Hawaiian basalts. We have examined mineral major and trace element and Sr-Nd-Pb-Hf-Os-O isotope variations in a suite of cumulate and lower Pacific crust xenoliths from the Ka‘ūpūlehu flow, Hualālai Volcano, Hawai‘i in order to constrain the depths of magma storage during Hualālai shield- and post-shield-stage volcanism and the effects of edifice and Pacific crust assimilation. Xenoliths range from 1- and 2-pyroxene gabbros to dunites. Pressures of equilibration for gabbroic and pyroxenitic xenoliths, calculated using two-pyroxene and clinopyroxene-only thermobarometry, suggest that most xenoliths, including both shield- and post-shield-stage cumulates, formed within the Pacific lower crust, at pressures &amp;gt;0.24 GPa. However, two gabbros record lower equilibration pressures (&amp;lt;0.2 GPa) and may have formed within the volcanic edifice. Dunite xenoliths also appear to have formed at shallower depths than most gabbro and pyroxenite xenoliths, inconsistent with a single liquid line of descent. These results indicate that, although shallow (intra-edifice) magma chambers are active during Hawaiian shield-stage volcanism, some magmas also pond and fractionate within or near the base of the Pacific crust during the shield stage. Mass and energy constrained geochemical modeling suggests that ponded melts are likely to assimilate significant quantities of wallrock material, with the mass ratio of assimilated material to crystals fractionated approaching one, regardless of depth of ponding. Elevated 187Os/188Os in some evolved post-shield-derived xenoliths are consistent with assimilation of lower Pacific crust, and low δ18O in xenoliths recording shallow equilibration pressures are consistent with edifice assimilation. However, the effects of assimilation on other radiogenic isotopes appear to be limited in most xenoliths and, by inference, in erupted basalts. Melt–wallrock reaction also appears to have modified the composition of the local Pacific crust. Although plagioclase from the lower oceanic crust record unradiogenic Sr-isotopes similar to mid-ocean ridge basalt (MORB), pyroxene Sr-Nd-Hf and whole-rock Os-isotopes have been variably affected by interaction with Hawaiian melts, resulting in a hybrid isotopic composition intermediate between MORB and Hawaiian shield-stage basalts. These hybrid isotopic compositions are qualitatively similar to Hawaiian rejuvenation-stage basalts. Similar hybridization is likely to have altered the isotopic composition of the Pacific lithospheric mantle. Therefore, Pb-isotope differences between MORB and rejuvenation-stage Hawaiian melts do not preclude melt generation within the Pacific lithosphere or asthenosphere. The isotopic signatures of rejuvenation-stage basalts may represent a unique depleted component within the Hawaiian plume, as suggested by previous studies, but requires additional investigation in light of these results.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="126020986"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="126020986"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 126020986; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=126020986]").text(description); $(".js-view-count[data-work-id=126020986]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 126020986; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='126020986']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 126020986, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (false){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "-1" } } $('.js-work-strip[data-work-id=126020986]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":126020986,"title":"Evolution of Hawaiian Volcano Magmatic Plumbing System and Implications for Melt/Edifice and Melt/Lithosphere Interaction: Constraints from Hualālai Xenoliths","translated_title":"","metadata":{"abstract":"The evolution of Hawaiian magmatic storage and transport systems in response to variations in magma supply over the course of volcano lifespan can have a significant influence on the type and amount of wallrock material that is assimilated by ponded melts prior to eruption. Understanding this plumbing evolution is therefore critical for evaluating the extent to which such melt/wallrock interaction affects the geochemical signals of Hawaiian basalts. We have examined mineral major and trace element and Sr-Nd-Pb-Hf-Os-O isotope variations in a suite of cumulate and lower Pacific crust xenoliths from the Ka‘ūpūlehu flow, Hualālai Volcano, Hawai‘i in order to constrain the depths of magma storage during Hualālai shield- and post-shield-stage volcanism and the effects of edifice and Pacific crust assimilation. Xenoliths range from 1- and 2-pyroxene gabbros to dunites. Pressures of equilibration for gabbroic and pyroxenitic xenoliths, calculated using two-pyroxene and clinopyroxene-only thermobarometry, suggest that most xenoliths, including both shield- and post-shield-stage cumulates, formed within the Pacific lower crust, at pressures \u0026amp;gt;0.24 GPa. However, two gabbros record lower equilibration pressures (\u0026amp;lt;0.2 GPa) and may have formed within the volcanic edifice. Dunite xenoliths also appear to have formed at shallower depths than most gabbro and pyroxenite xenoliths, inconsistent with a single liquid line of descent. These results indicate that, although shallow (intra-edifice) magma chambers are active during Hawaiian shield-stage volcanism, some magmas also pond and fractionate within or near the base of the Pacific crust during the shield stage. Mass and energy constrained geochemical modeling suggests that ponded melts are likely to assimilate significant quantities of wallrock material, with the mass ratio of assimilated material to crystals fractionated approaching one, regardless of depth of ponding. Elevated 187Os/188Os in some evolved post-shield-derived xenoliths are consistent with assimilation of lower Pacific crust, and low δ18O in xenoliths recording shallow equilibration pressures are consistent with edifice assimilation. However, the effects of assimilation on other radiogenic isotopes appear to be limited in most xenoliths and, by inference, in erupted basalts. Melt–wallrock reaction also appears to have modified the composition of the local Pacific crust. Although plagioclase from the lower oceanic crust record unradiogenic Sr-isotopes similar to mid-ocean ridge basalt (MORB), pyroxene Sr-Nd-Hf and whole-rock Os-isotopes have been variably affected by interaction with Hawaiian melts, resulting in a hybrid isotopic composition intermediate between MORB and Hawaiian shield-stage basalts. These hybrid isotopic compositions are qualitatively similar to Hawaiian rejuvenation-stage basalts. Similar hybridization is likely to have altered the isotopic composition of the Pacific lithospheric mantle. Therefore, Pb-isotope differences between MORB and rejuvenation-stage Hawaiian melts do not preclude melt generation within the Pacific lithosphere or asthenosphere. The isotopic signatures of rejuvenation-stage basalts may represent a unique depleted component within the Hawaiian plume, as suggested by previous studies, but requires additional investigation in light of these results.","publisher":"Oxford University Press","publication_date":{"day":1,"month":9,"year":2022,"errors":{}},"publication_name":"Journal of Petrology"},"translated_abstract":"The evolution of Hawaiian magmatic storage and transport systems in response to variations in magma supply over the course of volcano lifespan can have a significant influence on the type and amount of wallrock material that is assimilated by ponded melts prior to eruption. Understanding this plumbing evolution is therefore critical for evaluating the extent to which such melt/wallrock interaction affects the geochemical signals of Hawaiian basalts. We have examined mineral major and trace element and Sr-Nd-Pb-Hf-Os-O isotope variations in a suite of cumulate and lower Pacific crust xenoliths from the Ka‘ūpūlehu flow, Hualālai Volcano, Hawai‘i in order to constrain the depths of magma storage during Hualālai shield- and post-shield-stage volcanism and the effects of edifice and Pacific crust assimilation. Xenoliths range from 1- and 2-pyroxene gabbros to dunites. Pressures of equilibration for gabbroic and pyroxenitic xenoliths, calculated using two-pyroxene and clinopyroxene-only thermobarometry, suggest that most xenoliths, including both shield- and post-shield-stage cumulates, formed within the Pacific lower crust, at pressures \u0026amp;gt;0.24 GPa. However, two gabbros record lower equilibration pressures (\u0026amp;lt;0.2 GPa) and may have formed within the volcanic edifice. Dunite xenoliths also appear to have formed at shallower depths than most gabbro and pyroxenite xenoliths, inconsistent with a single liquid line of descent. These results indicate that, although shallow (intra-edifice) magma chambers are active during Hawaiian shield-stage volcanism, some magmas also pond and fractionate within or near the base of the Pacific crust during the shield stage. Mass and energy constrained geochemical modeling suggests that ponded melts are likely to assimilate significant quantities of wallrock material, with the mass ratio of assimilated material to crystals fractionated approaching one, regardless of depth of ponding. Elevated 187Os/188Os in some evolved post-shield-derived xenoliths are consistent with assimilation of lower Pacific crust, and low δ18O in xenoliths recording shallow equilibration pressures are consistent with edifice assimilation. However, the effects of assimilation on other radiogenic isotopes appear to be limited in most xenoliths and, by inference, in erupted basalts. Melt–wallrock reaction also appears to have modified the composition of the local Pacific crust. Although plagioclase from the lower oceanic crust record unradiogenic Sr-isotopes similar to mid-ocean ridge basalt (MORB), pyroxene Sr-Nd-Hf and whole-rock Os-isotopes have been variably affected by interaction with Hawaiian melts, resulting in a hybrid isotopic composition intermediate between MORB and Hawaiian shield-stage basalts. These hybrid isotopic compositions are qualitatively similar to Hawaiian rejuvenation-stage basalts. Similar hybridization is likely to have altered the isotopic composition of the Pacific lithospheric mantle. Therefore, Pb-isotope differences between MORB and rejuvenation-stage Hawaiian melts do not preclude melt generation within the Pacific lithosphere or asthenosphere. The isotopic signatures of rejuvenation-stage basalts may represent a unique depleted component within the Hawaiian plume, as suggested by previous studies, but requires additional investigation in light of these results.","internal_url":"https://www.academia.edu/126020986/Evolution_of_Hawaiian_Volcano_Magmatic_Plumbing_System_and_Implications_for_Melt_Edifice_and_Melt_Lithosphere_Interaction_Constraints_from_Hual%C4%81lai_Xenoliths","translated_internal_url":"","created_at":"2024-12-02T10:05:19.950-08:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":32506910,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[],"slug":"Evolution_of_Hawaiian_Volcano_Magmatic_Plumbing_System_and_Implications_for_Melt_Edifice_and_Melt_Lithosphere_Interaction_Constraints_from_Hualālai_Xenoliths","translated_slug":"","page_count":null,"language":"en","content_type":"Work","owner":{"id":32506910,"first_name":"David","middle_initials":null,"last_name":"Clague","page_name":"DavidClague","domain_name":"independent","created_at":"2015-06-24T12:33:45.015-07:00","display_name":"David Clague","url":"https://independent.academia.edu/DavidClague"},"attachments":[],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology"},{"id":407,"name":"Geochemistry","url":"https://www.academia.edu/Documents/in/Geochemistry"},{"id":2404,"name":"Petrology","url":"https://www.academia.edu/Documents/in/Petrology"},{"id":108863,"name":"Volcano","url":"https://www.academia.edu/Documents/in/Volcano"},{"id":197592,"name":"Magma","url":"https://www.academia.edu/Documents/in/Magma"},{"id":205582,"name":"Xenolith","url":"https://www.academia.edu/Documents/in/Xenolith"},{"id":415322,"name":"Magma Chamber","url":"https://www.academia.edu/Documents/in/Magma_Chamber"},{"id":418452,"name":"Crust","url":"https://www.academia.edu/Documents/in/Crust"}],"urls":[{"id":45890621,"url":"https://doi.org/10.1093/petrology/egac091"}]}, dispatcherData: dispatcherData }); $(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="126020981"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/126020981/High_resolution_AUV_mapping_and_ROV_sampling_of_mid_ocean_ridges"><img alt="Research paper thumbnail of High-resolution AUV mapping and ROV sampling of mid-ocean ridges" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/126020981/High_resolution_AUV_mapping_and_ROV_sampling_of_mid_ocean_ridges">High-resolution AUV mapping and ROV sampling of mid-ocean ridges</a></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Since the mid-1980s, eight eruptions have occurred along the Juan de Fuca and Gorda Ridges in the...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Since the mid-1980s, eight eruptions have occurred along the Juan de Fuca and Gorda Ridges in the NE Pacific. MBARI has examined seven of them, including the April 2015 eruption at Axial Seamount, using autonomous underwater vehicles (AUVs) to map at 1-m lateral resolution and remotely operated vehicles (ROVs) to observe and sample the lava flows and hydrothermal deposits. We have done similar work on the Alarcon Rise at the mouth of the Gulf of California, where all eruptions pre-date our studies of the ridge system, but are recent enough to host impressive active hydrothermal systems.AUV sonar data were processed with MB-System software and the resulting maps were brought into a geographical information system (GIS) for display and analysis. The highresolution AUV maps were used at sea as basemaps in a real-time GIS to guide our ROV dives with greater efficiency than possible before. From the maps and observations, we defined lava flow boundaries and channel systems, assessed fault activity, calculated flow sizes, evaluated age relationships between flows, and then sampled lavas for chemistry. Those data were coupled with age dates from sediment samples to place changes in eruption styles, lava chemistry, and hydrothermal systems on the ridges into the previously elusive framework of time. Using these tools, we have constructed geologic field maps and volcanic histories of the spreading ridges, much like volcanologists do on land, but all unprecedented for submarine volcanoes. The synergistic high-resolution mapping and targeted ROV sampling of the ridges has permitted better understanding of when, how, how much, and how often spreading ridges erupt, and how their magmatic and hydrothermal systems change over time.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="126020981"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="126020981"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 126020981; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=126020981]").text(description); $(".js-view-count[data-work-id=126020981]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 126020981; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='126020981']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 126020981, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (false){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "-1" } } $('.js-work-strip[data-work-id=126020981]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":126020981,"title":"High-resolution AUV mapping and ROV sampling of mid-ocean ridges","translated_title":"","metadata":{"abstract":"Since the mid-1980s, eight eruptions have occurred along the Juan de Fuca and Gorda Ridges in the NE Pacific. MBARI has examined seven of them, including the April 2015 eruption at Axial Seamount, using autonomous underwater vehicles (AUVs) to map at 1-m lateral resolution and remotely operated vehicles (ROVs) to observe and sample the lava flows and hydrothermal deposits. We have done similar work on the Alarcon Rise at the mouth of the Gulf of California, where all eruptions pre-date our studies of the ridge system, but are recent enough to host impressive active hydrothermal systems.AUV sonar data were processed with MB-System software and the resulting maps were brought into a geographical information system (GIS) for display and analysis. The highresolution AUV maps were used at sea as basemaps in a real-time GIS to guide our ROV dives with greater efficiency than possible before. From the maps and observations, we defined lava flow boundaries and channel systems, assessed fault activity, calculated flow sizes, evaluated age relationships between flows, and then sampled lavas for chemistry. Those data were coupled with age dates from sediment samples to place changes in eruption styles, lava chemistry, and hydrothermal systems on the ridges into the previously elusive framework of time. Using these tools, we have constructed geologic field maps and volcanic histories of the spreading ridges, much like volcanologists do on land, but all unprecedented for submarine volcanoes. The synergistic high-resolution mapping and targeted ROV sampling of the ridges has permitted better understanding of when, how, how much, and how often spreading ridges erupt, and how their magmatic and hydrothermal systems change over time.","publication_date":{"day":1,"month":9,"year":2016,"errors":{}}},"translated_abstract":"Since the mid-1980s, eight eruptions have occurred along the Juan de Fuca and Gorda Ridges in the NE Pacific. MBARI has examined seven of them, including the April 2015 eruption at Axial Seamount, using autonomous underwater vehicles (AUVs) to map at 1-m lateral resolution and remotely operated vehicles (ROVs) to observe and sample the lava flows and hydrothermal deposits. We have done similar work on the Alarcon Rise at the mouth of the Gulf of California, where all eruptions pre-date our studies of the ridge system, but are recent enough to host impressive active hydrothermal systems.AUV sonar data were processed with MB-System software and the resulting maps were brought into a geographical information system (GIS) for display and analysis. The highresolution AUV maps were used at sea as basemaps in a real-time GIS to guide our ROV dives with greater efficiency than possible before. From the maps and observations, we defined lava flow boundaries and channel systems, assessed fault activity, calculated flow sizes, evaluated age relationships between flows, and then sampled lavas for chemistry. Those data were coupled with age dates from sediment samples to place changes in eruption styles, lava chemistry, and hydrothermal systems on the ridges into the previously elusive framework of time. Using these tools, we have constructed geologic field maps and volcanic histories of the spreading ridges, much like volcanologists do on land, but all unprecedented for submarine volcanoes. The synergistic high-resolution mapping and targeted ROV sampling of the ridges has permitted better understanding of when, how, how much, and how often spreading ridges erupt, and how their magmatic and hydrothermal systems change over time.","internal_url":"https://www.academia.edu/126020981/High_resolution_AUV_mapping_and_ROV_sampling_of_mid_ocean_ridges","translated_internal_url":"","created_at":"2024-12-02T10:05:12.720-08:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":32506910,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[],"slug":"High_resolution_AUV_mapping_and_ROV_sampling_of_mid_ocean_ridges","translated_slug":"","page_count":null,"language":"en","content_type":"Work","owner":{"id":32506910,"first_name":"David","middle_initials":null,"last_name":"Clague","page_name":"DavidClague","domain_name":"independent","created_at":"2015-06-24T12:33:45.015-07:00","display_name":"David Clague","url":"https://independent.academia.edu/DavidClague"},"attachments":[],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology"},{"id":415,"name":"Oceanography","url":"https://www.academia.edu/Documents/in/Oceanography"},{"id":13003,"name":"Sonar","url":"https://www.academia.edu/Documents/in/Sonar"},{"id":79704,"name":"Underwater","url":"https://www.academia.edu/Documents/in/Underwater"},{"id":108863,"name":"Volcano","url":"https://www.academia.edu/Documents/in/Volcano"},{"id":131949,"name":"Remotely Operated Vehicle","url":"https://www.academia.edu/Documents/in/Remotely_Operated_Vehicle"},{"id":400968,"name":"Submarine","url":"https://www.academia.edu/Documents/in/Submarine"},{"id":574921,"name":"Seamount","url":"https://www.academia.edu/Documents/in/Seamount"},{"id":704204,"name":"Lava","url":"https://www.academia.edu/Documents/in/Lava"},{"id":769175,"name":"Bathymetry","url":"https://www.academia.edu/Documents/in/Bathymetry"},{"id":1006547,"name":"Ridge","url":"https://www.academia.edu/Documents/in/Ridge"},{"id":1291204,"name":"OCEANS Conference","url":"https://www.academia.edu/Documents/in/OCEANS_Conference"},{"id":1474464,"name":"Seafloor Spreading","url":"https://www.academia.edu/Documents/in/Seafloor_Spreading"}],"urls":[{"id":45890617,"url":"https://doi.org/10.1109/oceans.2016.7761264"}]}, dispatcherData: dispatcherData }); $(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> </div><div class="profile--tab_content_container js-tab-pane tab-pane" data-section-id="5723932" id="conferencepresentations"><div class="js-work-strip profile--work_container" data-work-id="15212535"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/15212535/Composition_within_and_between_Tonga_arc_Lau_Basin_backarc_eruptions_reveal_wide_variety_of_parent_melts_linked_to_eruption_styles"><img alt="Research paper thumbnail of Composition within and between Tonga arc/Lau Basin backarc eruptions reveal wide variety of parent melts linked to eruption styles" class="work-thumbnail" src="https://attachments.academia-assets.com/38583295/thumbnails/1.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/15212535/Composition_within_and_between_Tonga_arc_Lau_Basin_backarc_eruptions_reveal_wide_variety_of_parent_melts_linked_to_eruption_styles">Composition within and between Tonga arc/Lau Basin backarc eruptions reveal wide variety of parent melts linked to eruption styles</a></div><div class="wp-workCard_item wp-workCard--coauthors"><span>by </span><span><a class="" data-click-track="profile-work-strip-authors" href="https://independent.academia.edu/DavidClague">David Clague</a>, <a class="" data-click-track="profile-work-strip-authors" href="https://uri.academia.edu/KennaRubin">Kenna H Rubin</a>, <a class="" data-click-track="profile-work-strip-authors" href="https://manoa-hawaii.academia.edu/EricHellebrand">Eric Hellebrand</a>, <a class="" data-click-track="profile-work-strip-authors" href="https://tulsa.academia.edu/PeterMichael">Peter Michael</a>, <a class="" data-click-track="profile-work-strip-authors" href="https://independent.academia.edu/ETodd1">E. Todd</a>, and <a class="" data-click-track="profile-work-strip-authors" href="https://independent.academia.edu/richardarculus">richard arculus</a></span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">The Northern Tofua Arc and adjacent NE Lau Basin host a wide variety of volcano types reflecting ...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">The Northern Tofua Arc and adjacent NE Lau Basin host a wide variety of volcano types reflecting dynamic and diverse tectonic settings (e.g., rapidly opening basin, migrating microplate boundaries, within-plate discrete rear arc volcanoes, and weak on-arc magmatism, all in close spatial proximity). Frequent contemporaneous eruptions of high-MgO magmas and their differentiates from closely spaced volcanoes provide an uncommonly detailed view of the diversity of parent magma types formed in the broader suprasubduction zone environment. They show how mantle lithological variations couple with local tectonic setting to control magmatism, and influence magma accumulation, storage, and subsequent eruption. The results of 6 recent research expeditions to this relatively small region show how these attributes collectively result in systematic relationships between eruption style, inferred duration, size, intensity, location, and compositional variability. In particular, we can constrain magmatic conditions and timescales from single eruption deposits that we sampled with high-spatial-resolution in the context of detailed deposit mapping, high resolution 210 Po-210 Pb eruption chronologies, and U-Th-Ra disequilibrium. At the same time, variations between eruption deposits reveal how quickly parent melt compositions drawn from the mantle wedge can change in space and time. We will discuss and interpret diverse phenomena from the region, including high rates of temporal variability seen in magma compositions within single eruptions, ultra-high variability in source compositions sampled at sub-km scale on neighboring small Mata volcanoes, highly productive and frequent volcanism on the NE Lau Spreading center, and the petrogenetc links between boninite and high MgO basalt magmas with extensive contemporaneous dacite volcanism in the region.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="f5aa50fd9386eeb0bdfa415afaa4c81f" class="wp-workCard--action" rel="nofollow" data-click-track="profile-work-strip-download" data-download="{"attachment_id":38583295,"asset_id":15212535,"asset_type":"Work","button_location":"profile"}" href="https://www.academia.edu/attachments/38583295/download_file?st=MTczMzM0NzczNCw4LjIyMi4yMDguMTQ2&s=profile"><span><i class="fa fa-arrow-down"></i></span><span>Download</span></a><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="15212535"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="15212535"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 15212535; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=15212535]").text(description); $(".js-view-count[data-work-id=15212535]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 15212535; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='15212535']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 15212535, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (true){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "f5aa50fd9386eeb0bdfa415afaa4c81f" } } $('.js-work-strip[data-work-id=15212535]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":15212535,"title":"Composition within and between Tonga arc/Lau Basin backarc eruptions reveal wide variety of parent melts linked to eruption styles","translated_title":"","metadata":{"abstract":"The Northern Tofua Arc and adjacent NE Lau Basin host a wide variety of volcano types reflecting dynamic and diverse tectonic settings (e.g., rapidly opening basin, migrating microplate boundaries, within-plate discrete rear arc volcanoes, and weak on-arc magmatism, all in close spatial proximity). Frequent contemporaneous eruptions of high-MgO magmas and their differentiates from closely spaced volcanoes provide an uncommonly detailed view of the diversity of parent magma types formed in the broader suprasubduction zone environment. They show how mantle lithological variations couple with local tectonic setting to control magmatism, and influence magma accumulation, storage, and subsequent eruption. The results of 6 recent research expeditions to this relatively small region show how these attributes collectively result in systematic relationships between eruption style, inferred duration, size, intensity, location, and compositional variability. In particular, we can constrain magmatic conditions and timescales from single eruption deposits that we sampled with high-spatial-resolution in the context of detailed deposit mapping, high resolution 210 Po-210 Pb eruption chronologies, and U-Th-Ra disequilibrium. At the same time, variations between eruption deposits reveal how quickly parent melt compositions drawn from the mantle wedge can change in space and time. 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Frequent contemporaneous eruptions of high-MgO magmas and their differentiates from closely spaced volcanoes provide an uncommonly detailed view of the diversity of parent magma types formed in the broader suprasubduction zone environment. They show how mantle lithological variations couple with local tectonic setting to control magmatism, and influence magma accumulation, storage, and subsequent eruption. The results of 6 recent research expeditions to this relatively small region show how these attributes collectively result in systematic relationships between eruption style, inferred duration, size, intensity, location, and compositional variability. In particular, we can constrain magmatic conditions and timescales from single eruption deposits that we sampled with high-spatial-resolution in the context of detailed deposit mapping, high resolution 210 Po-210 Pb eruption chronologies, and U-Th-Ra disequilibrium. 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