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class="title-container"><h1 class="ds2-5-heading-sans-serif-sm">Arndt Schimmelmann</h1><div class="affiliations-container fake-truncate js-profile-affiliations"><div><a class="u-tcGrayDarker" href="https://indiana.academia.edu/">Indiana University</a>, <a class="u-tcGrayDarker" href="https://indiana.academia.edu/Departments/Earth_and_Atmospheric_Sciences/Documents">Earth and Atmospheric Sciences</a>, <span class="u-tcGrayDarker">Faculty Member</span></div></div></div></div><div class="sidebar-cta-container"><button class="ds2-5-button hidden profile-cta-button grow js-profile-follow-button" data-broccoli-component="user-info.follow-button" data-click-track="profile-user-info-follow-button" data-follow-user-fname="Arndt" data-follow-user-id="34137" data-follow-user-source="profile_button" data-has-google="false"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">add</span>Follow</button><button class="ds2-5-button hidden profile-cta-button grow 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class="data">1</p></div></a><span><div class="stat-container"><p class="label"><span class="js-profile-total-view-text">Public Views</span></p><p class="data"><span class="js-profile-view-count"></span></p></div></span></div><div class="user-bio-container"><div class="profile-bio fake-truncate js-profile-about" style="margin: 0px;">Stable isotope geochemistry, paleoclimatology, development of stable isotope reference materials<br /><br />website: https://earth.indiana.edu/directory/faculty/schimmelmann-arndt.html<br /><span class="u-fw700">Phone: </span>812-855-7645<br /><b>Address: </b>Arndt Schimmelmann<br />2001 E Ashwood Lane<br />Bloomington, IN 47401-9766<br />USA<br /><div class="js-profile-less-about u-linkUnstyled u-tcGrayDarker u-textDecorationUnderline u-displayNone">less</div></div></div><div class="ri-section"><div class="ri-section-header"><span>Interests</span><a class="ri-more-link js-profile-ri-list-card" data-click-track="profile-user-info-primary-research-interest" 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coal to heating at elevated hydrostatic and lithostatic pressures" class="work-thumbnail" src="https://attachments.academia-assets.com/114935271/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/119549032/Responses_of_specific_surface_area_and_micro_and_mesopore_characteristics_of_shale_and_coal_to_heating_at_elevated_hydrostatic_and_lithostatic_pressures">Responses of specific surface area and micro- and mesopore characteristics of shale and coal to heating at elevated hydrostatic and lithostatic pressures</a></div><div class="wp-workCard_item"><span>International Journal of Coal Geology</span><span>, Sep 1, 2018</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="3e7742e72f09006a643413858c2c7d7c" 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The proba-A gray silt layer 1-2 cm thick in the central Santa Barbara bly worst historic flood, in 1862, left the State of California Basin, dated by varve counts to A.D. 1605 { 5 yr, implies an bankrupt (Engstrom, 1996). However, it left surprisingly litintensity of precipitation, flooding of regional rivers, and transport tle geomorphological and geological evidence and it was of terrigenous detritus unmatched in the last 1000 yr. The inferred most likely dwarfed by earlier, prehistoric floods. First direct flood may correlate with the reported rare occurrence of a perenevidence for such earlier flooding in southern California was nial lake (14 C dated to 390 { 90 B.P.) in California's Mojave based on organic matter in laminated lake deposits in the Desert, 300 km east of the area draining into the Santa Barbara Mojave Desert, at the terminus of the Mojave River at Silver Basin. The dating of the A.D. 1605 { 5 yr flood event is consistent Lake playa (Fig. 1), with 14 C-based age estimates of 390 { with tree-ring evidence for a wet and cold paleoclimate elsewhere 90 and 3620 { 70 14 C yr B.P. that probably represent the in the region. Regional and global climate evidence indicates that mean ages of the deposition of these units (Enzel et al., much of the world also experienced rapid, intense cooling around A.D. 1605. This cooling was probably accompanied by an equa-1989, 1992). torward shift of prevailing wind patterns and associated storm Here we describe the first dated offshore evidence of a tracks. ᭧ 1998 University of Washington. large flood in southern California that occurred close to 400 Key Words: flood; sediment; Santa Barbara Basin; climatic teleyears ago and is likely coeval with the younger Silver Lake connection; paleoclimate; Little Ice Age. episode. After using varve counts to estimate an age between A.D. 1600 and 1610, we explore possible climatic connections with extreme events elsewhere in the region and around INTRODUCTION the globe. A fluctuating Quaternary precipitation regime in southern THE SANTA BARBARA BASIN FLOOD LAYER California's hinterland intermittently produced large lakes OF A.D. 1605 { 5 yr until the onset of mostly arid conditions during the Holocene (Stine, 1990). 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Karst is considered a potential sink for the atmospheric greenhouse gas CH4 because its subsurface drainage networks and solution-enlarged fractures facilitate atmospheric exchange. Karst landscapes cover about 14% of earth's continental surface, but observations of CH4 concentrations in cave air are limited to localized studies in Gibraltar, Spain, Indiana (USA), Vietnam, Australia, and by incomplete isotopic data. To test if karst is acting as a global CH4 sink, we measured the CH4 concentrations, δ 13 CCH 4 , and δ 2 HCH 4 values of cave air from 33 caves in the USA and three caves in New Zealand. We also measured CO2 concentrations, δ 13 CCO 2 , and radon (Rn) concentrations to support CH4 data interpretation by assessing cave air residence times and mixing processes. Among these caves, 35 exhibited subatmospheric CH4 concentrations in at least one location compared to their local atmospheric backgrounds. CH4 concentrations, δ 13 CCH 4 , and δ 2 HCH 4 values suggest that microbial methanotrophy within caves is the primary CH4 consumption mechanism. Only 5 locations from 3 caves showed elevated CH4 concentrations compared to the atmospheric background and could be ascribed to local CH4 sources from sewage and outgassing swamp water. Several associated δ 13 CCH 4 and δ 2 HCH 4 values point to carbonate reduction and acetate fermentation as biochemical pathways of limited methanogenesis in karst environments and suggest that these pathways occur in the environment over large spatial scales. Our data show that karst environments function as a global CH4 sink.","publication_date":{"day":14,"month":1,"year":2019,"errors":{}},"grobid_abstract_attachment_id":114935251},"translated_abstract":null,"internal_url":"https://www.academia.edu/119549016/Subterranean_karst_environments_as_a_global_sink_for_atmospheric_methane","translated_internal_url":"","created_at":"2024-05-19T13:54:47.572-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":34137,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[{"id":114935251,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/114935251/thumbnails/1.jpg","file_name":"1269_Subterranean-Karst-Environments.pdf","download_url":"https://www.academia.edu/attachments/114935251/download_file?st=MTczMjc1NzUxNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Subterranean_karst_environments_as_a_glo.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/114935251/1269_Subterranean-Karst-Environments-libre.pdf?1716168057=\u0026response-content-disposition=attachment%3B+filename%3DSubterranean_karst_environments_as_a_glo.pdf\u0026Expires=1732740456\u0026Signature=E2GAeQ4igPDe1cSsJAs5ArJfMpZsxM6OFJIBRV3pfNZtZe76a8NbrNPQDMOmZ-F8GLmQG9AXBrxbhO~PaW7MEE-8tvQ5ljphnw-PcNdFKjF94Qlveb-ZwniU4snPABMkHjSy0YVO6iH3MhytN0m0cXZY6DBZpFoUmRyMdUWAsQxYhe0O2LII-VDjuil6c5DzKW9IbhPN0sjvbyQj8R2CQyITlAeas4bQYiWPm2Fd~H7w7m~dUDOFDjXREYzs4CdZvvbMYgoNgpnkSoDnzqPyof2QeERjLRBDHURUodiGr9HYbl8UNNa4ICbUJ-zzFxSrx63fi3VZgvaWWzsneB3dgw__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"slug":"Subterranean_karst_environments_as_a_global_sink_for_atmospheric_methane","translated_slug":"","page_count":38,"language":"en","content_type":"Work","owner":{"id":34137,"first_name":"Arndt","middle_initials":null,"last_name":"Schimmelmann","page_name":"ArndtSchimmelmann","domain_name":"indiana","created_at":"2009-03-07T08:57:01.308-08:00","display_name":"Arndt Schimmelmann","url":"https://indiana.academia.edu/ArndtSchimmelmann"},"attachments":[{"id":114935251,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/114935251/thumbnails/1.jpg","file_name":"1269_Subterranean-Karst-Environments.pdf","download_url":"https://www.academia.edu/attachments/114935251/download_file?st=MTczMjc1NzUxNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Subterranean_karst_environments_as_a_glo.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/114935251/1269_Subterranean-Karst-Environments-libre.pdf?1716168057=\u0026response-content-disposition=attachment%3B+filename%3DSubterranean_karst_environments_as_a_glo.pdf\u0026Expires=1732740456\u0026Signature=E2GAeQ4igPDe1cSsJAs5ArJfMpZsxM6OFJIBRV3pfNZtZe76a8NbrNPQDMOmZ-F8GLmQG9AXBrxbhO~PaW7MEE-8tvQ5ljphnw-PcNdFKjF94Qlveb-ZwniU4snPABMkHjSy0YVO6iH3MhytN0m0cXZY6DBZpFoUmRyMdUWAsQxYhe0O2LII-VDjuil6c5DzKW9IbhPN0sjvbyQj8R2CQyITlAeas4bQYiWPm2Fd~H7w7m~dUDOFDjXREYzs4CdZvvbMYgoNgpnkSoDnzqPyof2QeERjLRBDHURUodiGr9HYbl8UNNa4ICbUJ-zzFxSrx63fi3VZgvaWWzsneB3dgw__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"research_interests":[{"id":400,"name":"Earth Sciences","url":"https://www.academia.edu/Documents/in/Earth_Sciences"},{"id":110290,"name":"Karst","url":"https://www.academia.edu/Documents/in/Karst"},{"id":118582,"name":"Physical sciences","url":"https://www.academia.edu/Documents/in/Physical_sciences"},{"id":156347,"name":"Methane","url":"https://www.academia.edu/Documents/in/Methane"}],"urls":[{"id":42114264,"url":"https://doi.org/10.14434/iusw.705"}]}, dispatcherData: dispatcherData }); 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Parallel series of samples from all three horizons were analyzed for vitrinite reflectance (R o , %) and other parameters to evaluate the lateral extension of the thermal aureole. R o values in the porous and fluid-permeable coal increase from a background value of~0.66% at ≥4.0 m distance from the dike to more than 5.0% at the intrusive contact. R o values in the underlying paleosol increase from a background of~0.65% at ≥3 m distance to 1.74% at the dike contact. In contrast, roof rock shale close to the contact had a higher R o value than the paleosol (R o = 2.56%). These differences cannot be explained by thermal conductivity of heat alone, or the coal having lower thermal conductivity would show lower vitrinite reflectance values. Apparently, the coal having much higher R o values experienced enhanced lateral convective heat transfer in comparison to the denser and less permeable, but more conductive, rocks in the paleosol and overlying black shale. The advection of relatively cold fluid in the lower part of the coal seam streaming towards the dike may have provided cooling for floor rock close to the coal near the contact. In contrast, roof rock close to the contact had a higher R o value than the paleosol (R o = 2.56%) in the absence of cooling.","publication_date":{"day":1,"month":9,"year":2016,"errors":{}},"publication_name":"International Journal of Coal Geology","grobid_abstract_attachment_id":114935262},"translated_abstract":null,"internal_url":"https://www.academia.edu/119548993/Dike_induced_thermal_alteration_of_the_Springfield_Coal_Member_Pennsylvanian_and_adjacent_clastic_rocks_Illinois_Basin_USA","translated_internal_url":"","created_at":"2024-05-19T13:54:36.379-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":34137,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[{"id":114935262,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/114935262/thumbnails/1.jpg","file_name":"j.coal.2016.07.00520240519-1-hmjuh1.pdf","download_url":"https://www.academia.edu/attachments/114935262/download_file?st=MTczMjc1NzUxNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Dike_induced_thermal_alteration_of_the_S.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/114935262/j.coal.2016.07.00520240519-1-hmjuh1-libre.pdf?1716168026=\u0026response-content-disposition=attachment%3B+filename%3DDike_induced_thermal_alteration_of_the_S.pdf\u0026Expires=1732740456\u0026Signature=FHGyCT31ughg6XDGcBhSkTH8DKYsGs7LWS~npM1QQbqZpxF1Sgom818PQOrdvltkN2dGemIXPWmZ2PAu5NWerezD8zRjxcnq9XwI6ZmtNtyqOO63~kLaOLEEFyD43Xy4pFzP4UgpTcykkLhhxjMePdWC9NMHNyYxPBAbJ2VKxSW-d5vEndyIT8Wt8dcShml5o-RSdtr6DO~oArDHPTgBjufOyIeJ9wZj6wiWJq8h4EdBe~PBSw2-y2qlhX97-FpmpwY30DYXBVzisVDNTgzNCnZAREiPSsAdsxtb2~D8uHr2nAFwJsUTN77oO2mMLMSLA11xe2BYUOee8gsM-r7gGQ__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"slug":"Dike_induced_thermal_alteration_of_the_Springfield_Coal_Member_Pennsylvanian_and_adjacent_clastic_rocks_Illinois_Basin_USA","translated_slug":"","page_count":10,"language":"en","content_type":"Work","owner":{"id":34137,"first_name":"Arndt","middle_initials":null,"last_name":"Schimmelmann","page_name":"ArndtSchimmelmann","domain_name":"indiana","created_at":"2009-03-07T08:57:01.308-08:00","display_name":"Arndt Schimmelmann","url":"https://indiana.academia.edu/ArndtSchimmelmann"},"attachments":[{"id":114935262,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/114935262/thumbnails/1.jpg","file_name":"j.coal.2016.07.00520240519-1-hmjuh1.pdf","download_url":"https://www.academia.edu/attachments/114935262/download_file?st=MTczMjc1NzUxNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Dike_induced_thermal_alteration_of_the_S.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/114935262/j.coal.2016.07.00520240519-1-hmjuh1-libre.pdf?1716168026=\u0026response-content-disposition=attachment%3B+filename%3DDike_induced_thermal_alteration_of_the_S.pdf\u0026Expires=1732740456\u0026Signature=FHGyCT31ughg6XDGcBhSkTH8DKYsGs7LWS~npM1QQbqZpxF1Sgom818PQOrdvltkN2dGemIXPWmZ2PAu5NWerezD8zRjxcnq9XwI6ZmtNtyqOO63~kLaOLEEFyD43Xy4pFzP4UgpTcykkLhhxjMePdWC9NMHNyYxPBAbJ2VKxSW-d5vEndyIT8Wt8dcShml5o-RSdtr6DO~oArDHPTgBjufOyIeJ9wZj6wiWJq8h4EdBe~PBSw2-y2qlhX97-FpmpwY30DYXBVzisVDNTgzNCnZAREiPSsAdsxtb2~D8uHr2nAFwJsUTN77oO2mMLMSLA11xe2BYUOee8gsM-r7gGQ__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology"},{"id":33451,"name":"Oil Shale","url":"https://www.academia.edu/Documents/in/Oil_Shale"},{"id":127831,"name":"Coal Geology","url":"https://www.academia.edu/Documents/in/Coal_Geology"},{"id":197587,"name":"Dike","url":"https://www.academia.edu/Documents/in/Dike"},{"id":331681,"name":"Pennsylvanian","url":"https://www.academia.edu/Documents/in/Pennsylvanian"},{"id":2502039,"name":"vitrinite","url":"https://www.academia.edu/Documents/in/vitrinite"}],"urls":[{"id":42114254,"url":"https://doi.org/10.1016/j.coal.2016.07.005"}]}, dispatcherData: dispatcherData }); 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Our findings suggest that high permeability and shallow (100250 m) depths of these Indiana coals ...</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="119548991"><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="119548991"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 119548991; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=119548991]").text(description); $(".js-view-count[data-work-id=119548991]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 119548991; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='119548991']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 119548991, 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" } } $('.js-work-strip[data-work-id=119548991]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":119548991,"title":"Variability of geochemical properties in a microbially dominated coalbed gas system from the eastern margin of the Illinois Basin, USA","translated_title":"","metadata":{"abstract":"This study outlines gas characteristics along the southeastern margins of the Illinois Basin and evaluates regional versus local gas variations in Seelyville and Springfield coal beds. 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Without a long written history in Vietnam, we need to rely on geoarchives such as lake sediments to reconstruct past monsoon variability and regional paleoenvironmental fluctuations and evaluate current climatic trends. Natural lakes in the Central Highlands of Vietnam have the potential to have recorded shifts of the monsoon belt over glacial/interglacial cycles. Since 2016, the EOS Geoscience Research Group at Vietnam National University, Hanoi (EOS group) has collaborated with international partners to collect and analyze Vietnamese lake sediments to reconstruct the Pleistocene-Holocene climate history. Numerous sediment cores have been retrieved from Biển Hồ, Ia Bang, Ea Tyn, Ea Sno and Lak lakes between 2016 and 2022. Of special importance is a 25 m long sediment core from Biển Hồ Lake (Gia Lai province) covering the last 57 ka, which the team retrieved in April 2021. 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Numerous sediment cores have been retrieved from Biển Hồ, Ia Bang, Ea Tyn, Ea Sno and Lak lakes between 2016 and 2022. Of special importance is a 25 m long sediment core from Biển Hồ Lake (Gia Lai province) covering the last 57 ka, which the team retrieved in April 2021. 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The Southeast Asian tropics remain severely under-represented in paleoenvironmental and paleoclimatic reconstructions, although a few recent paleoclimate studies evaluated the variability, position and strength of the main Asian monsoon systems at different timescales from modern records to the last 15,000 years. Comparable data from Việt Nam, however, are scarce although Việt Nam and its Central Highlands are critically located at the intersection of the East Asian Summer Monsoon and the Indian Summer Monsoon with highly important socio-ecological consequences from changes in the climate system. This study presents a high-resolution sedimentary climate record from Ea Tyn Lake in Việt Nam’s Central Highlands covering the last 1250 years. Using geochemical and sedimentological proxies and principal com...</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="119548982"><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="119548982"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 119548982; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=119548982]").text(description); $(".js-view-count[data-work-id=119548982]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 119548982; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='119548982']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 119548982, 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" } } $('.js-work-strip[data-work-id=119548982]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":119548982,"title":"A high-resolution, 1250-year long drought record from Ea Tyn Lake, Central Highlands of Việt Nam","translated_title":"","metadata":{"abstract":"An understanding of past climatic variability at regional to local scales is mandatory for a proper evaluation of current and potential future repercussions from global climate change. 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$(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="119548975"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" rel="nofollow" href="https://www.academia.edu/119548975/Evidence_for_the_Role_of_Water_in_Ch4_Generation_from_Long_Term_Low_Temperature_Experimental_Maturation_of_Immature_Shales"><img alt="Research paper thumbnail of Evidence for the Role of Water in Ch4 Generation from Long-Term, Low Temperature Experimental Maturation of Immature Shales" 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" rel="nofollow" href="https://www.academia.edu/119548975/Evidence_for_the_Role_of_Water_in_Ch4_Generation_from_Long_Term_Low_Temperature_Experimental_Maturation_of_Immature_Shales">Evidence for the Role of Water in Ch4 Generation from Long-Term, Low Temperature Experimental Maturation of Immature Shales</a></div><div class="wp-workCard_item"><span>30th International Meeting on Organic Geochemistry (IMOG 2021)</span><span>, 2021</span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Summary The conventional paradigm for generation of economically viable petroleum reserves involv...</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">Summary The conventional paradigm for generation of economically viable petroleum reserves involves thermal cleavage of C-C bonds within sedimentary organic matter. However, there is evidence for alternative chemical pathways yielding non-microbial methane generation at low temperatures. In addition, assessing the role of water in methane generation at temperatures lower than those required for it to form by thermal cracking represents a critical step for evaluating processes likely involved in catalytic methanogenesis. Previous pyrolysis experiments of source rocks in the presence and absence of water have yielded insights on the role of water in CH4 generation at a range of maturities including late-stage thermogenesis. Our studies explore the role of catalytic pathways in CH4 generation by experiments simulating maturation of immature source rocks at temperatures insufficient to achieve thermal cleavage of C-C bonds. These hydrous maturation experiments demonstrate that immature shales can generate CH4 at temperatures (80–100 °C). They establish the potential to yield δ13C values &lt;-70 ‰ commonly associated with microbial gas by early CH4 generation at low maturity levels. Incorporation of 2H derived from 2H-enriched water in these hydrous maturation experiments confirms the role of water in catalytic processes generating CH4 at low temperatures.</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="119548975"><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="119548975"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 119548975; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=119548975]").text(description); $(".js-view-count[data-work-id=119548975]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 119548975; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='119548975']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 119548975, 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" } } $('.js-work-strip[data-work-id=119548975]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":119548975,"title":"Evidence for the Role of Water in Ch4 Generation from Long-Term, Low Temperature Experimental Maturation of Immature Shales","translated_title":"","metadata":{"abstract":"Summary The conventional paradigm for generation of economically viable petroleum reserves involves thermal cleavage of C-C bonds within sedimentary organic matter. However, there is evidence for alternative chemical pathways yielding non-microbial methane generation at low temperatures. In addition, assessing the role of water in methane generation at temperatures lower than those required for it to form by thermal cracking represents a critical step for evaluating processes likely involved in catalytic methanogenesis. Previous pyrolysis experiments of source rocks in the presence and absence of water have yielded insights on the role of water in CH4 generation at a range of maturities including late-stage thermogenesis. Our studies explore the role of catalytic pathways in CH4 generation by experiments simulating maturation of immature source rocks at temperatures insufficient to achieve thermal cleavage of C-C bonds. These hydrous maturation experiments demonstrate that immature shales can generate CH4 at temperatures (80–100 °C). They establish the potential to yield δ13C values \u0026lt;-70 ‰ commonly associated with microbial gas by early CH4 generation at low maturity levels. Incorporation of 2H derived from 2H-enriched water in these hydrous maturation experiments confirms the role of water in catalytic processes generating CH4 at low temperatures.","publisher":"European Association of Geoscientists \u0026 Engineers","publication_date":{"day":null,"month":null,"year":2021,"errors":{}},"publication_name":"30th International Meeting on Organic Geochemistry (IMOG 2021)"},"translated_abstract":"Summary The conventional paradigm for generation of economically viable petroleum reserves involves thermal cleavage of C-C bonds within sedimentary organic matter. However, there is evidence for alternative chemical pathways yielding non-microbial methane generation at low temperatures. 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The proba-A gray silt layer 1-2 cm thick in the central Santa Barbara bly worst historic flood, in 1862, left the State of California Basin, dated by varve counts to A.D. 1605 { 5 yr, implies an bankrupt (Engstrom, 1996). However, it left surprisingly litintensity of precipitation, flooding of regional rivers, and transport tle geomorphological and geological evidence and it was of terrigenous detritus unmatched in the last 1000 yr. The inferred most likely dwarfed by earlier, prehistoric floods. First direct flood may correlate with the reported rare occurrence of a perenevidence for such earlier flooding in southern California was nial lake (14 C dated to 390 { 90 B.P.) in California's Mojave based on organic matter in laminated lake deposits in the Desert, 300 km east of the area draining into the Santa Barbara Mojave Desert, at the terminus of the Mojave River at Silver Basin. The dating of the A.D. 1605 { 5 yr flood event is consistent Lake playa (Fig. 1), with 14 C-based age estimates of 390 { with tree-ring evidence for a wet and cold paleoclimate elsewhere 90 and 3620 { 70 14 C yr B.P. that probably represent the in the region. Regional and global climate evidence indicates that mean ages of the deposition of these units (Enzel et al., much of the world also experienced rapid, intense cooling around A.D. 1605. This cooling was probably accompanied by an equa-1989, 1992). torward shift of prevailing wind patterns and associated storm Here we describe the first dated offshore evidence of a tracks. ᭧ 1998 University of Washington. large flood in southern California that occurred close to 400 Key Words: flood; sediment; Santa Barbara Basin; climatic teleyears ago and is likely coeval with the younger Silver Lake connection; paleoclimate; Little Ice Age. episode. After using varve counts to estimate an age between A.D. 1600 and 1610, we explore possible climatic connections with extreme events elsewhere in the region and around INTRODUCTION the globe. A fluctuating Quaternary precipitation regime in southern THE SANTA BARBARA BASIN FLOOD LAYER California's hinterland intermittently produced large lakes OF A.D. 1605 { 5 yr until the onset of mostly arid conditions during the Holocene (Stine, 1990). During its short historic time, California's predominantly dry regions have only occasionally witnessed Extreme precipitation in the Mojave River catchment of Southern California around 390 { 90 14 C yr B.P. should also have resulted in flooding of other regional rivers and","publication_date":{"day":null,"month":null,"year":1998,"errors":{}},"publication_name":"Quaternary Research","grobid_abstract_attachment_id":114935259},"translated_abstract":null,"internal_url":"https://www.academia.edu/119549025/A_Large_California_Flood_and_Correlative_Global_Climatic_Events_400_Years_Ago","translated_internal_url":"","created_at":"2024-05-19T13:54:49.439-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":34137,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[{"id":114935259,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/114935259/thumbnails/1.jpg","file_name":"qres.1997.193720240519-1-777cb3.pdf","download_url":"https://www.academia.edu/attachments/114935259/download_file?st=MTczMjc1NzUxNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"A_Large_California_Flood_and_Correlative.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/114935259/qres.1997.193720240519-1-777cb3-libre.pdf?1716168022=\u0026response-content-disposition=attachment%3B+filename%3DA_Large_California_Flood_and_Correlative.pdf\u0026Expires=1732740455\u0026Signature=HrQQPRWhyiKz61eM4RmFVFDDLY4X~efLf3Repiqb5TZ2RAeeKSx6d1pdLt1QDR4-3HPHaMfBGPJ0RZX-E84KWRCQ3H3F2X6p0SEXMZCV6XOF84o53guRUvRYtj3T-VMnWebzQKMtIHXg2lXNCeH2nO6rmuOXuOHseZtA2ZAIYd-AOhs8ufAOCv-7YeWtEKceKKX7GwkAOQMBeIoRrVl4Pw4imG2YAoSIa~x6IPcNDGwxGdN4oxMNn1nFWUjeMcnghUl~PhMbGabQByAPvj8ZCbloFUvR4s55wRX1v1UhBQwOZbxGCRdWBZNHjVkzhvnK8bZum2ytjSBw~nDVhiYNKA__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"slug":"A_Large_California_Flood_and_Correlative_Global_Climatic_Events_400_Years_Ago","translated_slug":"","page_count":11,"language":"en","content_type":"Work","owner":{"id":34137,"first_name":"Arndt","middle_initials":null,"last_name":"Schimmelmann","page_name":"ArndtSchimmelmann","domain_name":"indiana","created_at":"2009-03-07T08:57:01.308-08:00","display_name":"Arndt Schimmelmann","url":"https://indiana.academia.edu/ArndtSchimmelmann"},"attachments":[{"id":114935259,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/114935259/thumbnails/1.jpg","file_name":"qres.1997.193720240519-1-777cb3.pdf","download_url":"https://www.academia.edu/attachments/114935259/download_file?st=MTczMjc1NzUxNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"A_Large_California_Flood_and_Correlative.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/114935259/qres.1997.193720240519-1-777cb3-libre.pdf?1716168022=\u0026response-content-disposition=attachment%3B+filename%3DA_Large_California_Flood_and_Correlative.pdf\u0026Expires=1732740455\u0026Signature=HrQQPRWhyiKz61eM4RmFVFDDLY4X~efLf3Repiqb5TZ2RAeeKSx6d1pdLt1QDR4-3HPHaMfBGPJ0RZX-E84KWRCQ3H3F2X6p0SEXMZCV6XOF84o53guRUvRYtj3T-VMnWebzQKMtIHXg2lXNCeH2nO6rmuOXuOHseZtA2ZAIYd-AOhs8ufAOCv-7YeWtEKceKKX7GwkAOQMBeIoRrVl4Pw4imG2YAoSIa~x6IPcNDGwxGdN4oxMNn1nFWUjeMcnghUl~PhMbGabQByAPvj8ZCbloFUvR4s55wRX1v1UhBQwOZbxGCRdWBZNHjVkzhvnK8bZum2ytjSBw~nDVhiYNKA__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"research_interests":[{"id":392,"name":"Archaeology","url":"https://www.academia.edu/Documents/in/Archaeology"},{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology"},{"id":2258,"name":"Paleoclimatology","url":"https://www.academia.edu/Documents/in/Paleoclimatology"},{"id":35587,"name":"Quaternary","url":"https://www.academia.edu/Documents/in/Quaternary"},{"id":162136,"name":"Storm","url":"https://www.academia.edu/Documents/in/Storm"},{"id":165139,"name":"Mojave Desert","url":"https://www.academia.edu/Documents/in/Mojave_Desert"},{"id":182364,"name":"Little Ice Age","url":"https://www.academia.edu/Documents/in/Little_Ice_Age"},{"id":630543,"name":"Tree Ring","url":"https://www.academia.edu/Documents/in/Tree_Ring"},{"id":1875619,"name":"Varve","url":"https://www.academia.edu/Documents/in/Varve"},{"id":3647976,"name":"Flood Myth","url":"https://www.academia.edu/Documents/in/Flood_Myth"}],"urls":[{"id":42114266,"url":"https://doi.org/10.1006/qres.1997.1937"}]}, dispatcherData: dispatcherData }); 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Karst is considered a potential sink for the atmospheric greenhouse gas CH4 because its subsurface drainage networks and solution-enlarged fractures facilitate atmospheric exchange. Karst landscapes cover about 14% of earth's continental surface, but observations of CH4 concentrations in cave air are limited to localized studies in Gibraltar, Spain, Indiana (USA), Vietnam, Australia, and by incomplete isotopic data. To test if karst is acting as a global CH4 sink, we measured the CH4 concentrations, δ 13 CCH 4 , and δ 2 HCH 4 values of cave air from 33 caves in the USA and three caves in New Zealand. We also measured CO2 concentrations, δ 13 CCO 2 , and radon (Rn) concentrations to support CH4 data interpretation by assessing cave air residence times and mixing processes. Among these caves, 35 exhibited subatmospheric CH4 concentrations in at least one location compared to their local atmospheric backgrounds. CH4 concentrations, δ 13 CCH 4 , and δ 2 HCH 4 values suggest that microbial methanotrophy within caves is the primary CH4 consumption mechanism. Only 5 locations from 3 caves showed elevated CH4 concentrations compared to the atmospheric background and could be ascribed to local CH4 sources from sewage and outgassing swamp water. Several associated δ 13 CCH 4 and δ 2 HCH 4 values point to carbonate reduction and acetate fermentation as biochemical pathways of limited methanogenesis in karst environments and suggest that these pathways occur in the environment over large spatial scales. Our data show that karst environments function as a global CH4 sink.","publication_date":{"day":14,"month":1,"year":2019,"errors":{}},"grobid_abstract_attachment_id":114935251},"translated_abstract":null,"internal_url":"https://www.academia.edu/119549016/Subterranean_karst_environments_as_a_global_sink_for_atmospheric_methane","translated_internal_url":"","created_at":"2024-05-19T13:54:47.572-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":34137,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[{"id":114935251,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/114935251/thumbnails/1.jpg","file_name":"1269_Subterranean-Karst-Environments.pdf","download_url":"https://www.academia.edu/attachments/114935251/download_file?st=MTczMjc1NzUxNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Subterranean_karst_environments_as_a_glo.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/114935251/1269_Subterranean-Karst-Environments-libre.pdf?1716168057=\u0026response-content-disposition=attachment%3B+filename%3DSubterranean_karst_environments_as_a_glo.pdf\u0026Expires=1732740456\u0026Signature=E2GAeQ4igPDe1cSsJAs5ArJfMpZsxM6OFJIBRV3pfNZtZe76a8NbrNPQDMOmZ-F8GLmQG9AXBrxbhO~PaW7MEE-8tvQ5ljphnw-PcNdFKjF94Qlveb-ZwniU4snPABMkHjSy0YVO6iH3MhytN0m0cXZY6DBZpFoUmRyMdUWAsQxYhe0O2LII-VDjuil6c5DzKW9IbhPN0sjvbyQj8R2CQyITlAeas4bQYiWPm2Fd~H7w7m~dUDOFDjXREYzs4CdZvvbMYgoNgpnkSoDnzqPyof2QeERjLRBDHURUodiGr9HYbl8UNNa4ICbUJ-zzFxSrx63fi3VZgvaWWzsneB3dgw__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"slug":"Subterranean_karst_environments_as_a_global_sink_for_atmospheric_methane","translated_slug":"","page_count":38,"language":"en","content_type":"Work","owner":{"id":34137,"first_name":"Arndt","middle_initials":null,"last_name":"Schimmelmann","page_name":"ArndtSchimmelmann","domain_name":"indiana","created_at":"2009-03-07T08:57:01.308-08:00","display_name":"Arndt Schimmelmann","url":"https://indiana.academia.edu/ArndtSchimmelmann"},"attachments":[{"id":114935251,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/114935251/thumbnails/1.jpg","file_name":"1269_Subterranean-Karst-Environments.pdf","download_url":"https://www.academia.edu/attachments/114935251/download_file?st=MTczMjc1NzUxNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Subterranean_karst_environments_as_a_glo.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/114935251/1269_Subterranean-Karst-Environments-libre.pdf?1716168057=\u0026response-content-disposition=attachment%3B+filename%3DSubterranean_karst_environments_as_a_glo.pdf\u0026Expires=1732740456\u0026Signature=E2GAeQ4igPDe1cSsJAs5ArJfMpZsxM6OFJIBRV3pfNZtZe76a8NbrNPQDMOmZ-F8GLmQG9AXBrxbhO~PaW7MEE-8tvQ5ljphnw-PcNdFKjF94Qlveb-ZwniU4snPABMkHjSy0YVO6iH3MhytN0m0cXZY6DBZpFoUmRyMdUWAsQxYhe0O2LII-VDjuil6c5DzKW9IbhPN0sjvbyQj8R2CQyITlAeas4bQYiWPm2Fd~H7w7m~dUDOFDjXREYzs4CdZvvbMYgoNgpnkSoDnzqPyof2QeERjLRBDHURUodiGr9HYbl8UNNa4ICbUJ-zzFxSrx63fi3VZgvaWWzsneB3dgw__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"research_interests":[{"id":400,"name":"Earth Sciences","url":"https://www.academia.edu/Documents/in/Earth_Sciences"},{"id":110290,"name":"Karst","url":"https://www.academia.edu/Documents/in/Karst"},{"id":118582,"name":"Physical sciences","url":"https://www.academia.edu/Documents/in/Physical_sciences"},{"id":156347,"name":"Methane","url":"https://www.academia.edu/Documents/in/Methane"}],"urls":[{"id":42114264,"url":"https://doi.org/10.14434/iusw.705"}]}, dispatcherData: dispatcherData }); 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$(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="119548995"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" rel="nofollow" href="https://www.academia.edu/119548995/The_origin_of_coalbed_methane"><img alt="Research paper thumbnail of The origin of coalbed methane" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" rel="nofollow" href="https://www.academia.edu/119548995/The_origin_of_coalbed_methane">The origin of coalbed methane</a></div><div class="wp-workCard_item"><span>Elsevier eBooks</span><span>, 2020</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="119548995"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="119548995"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 119548995; 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Parallel series of samples from all three horizons were analyzed for vitrinite reflectance (R o , %) and other parameters to evaluate the lateral extension of the thermal aureole. R o values in the porous and fluid-permeable coal increase from a background value of~0.66% at ≥4.0 m distance from the dike to more than 5.0% at the intrusive contact. R o values in the underlying paleosol increase from a background of~0.65% at ≥3 m distance to 1.74% at the dike contact. In contrast, roof rock shale close to the contact had a higher R o value than the paleosol (R o = 2.56%). These differences cannot be explained by thermal conductivity of heat alone, or the coal having lower thermal conductivity would show lower vitrinite reflectance values. Apparently, the coal having much higher R o values experienced enhanced lateral convective heat transfer in comparison to the denser and less permeable, but more conductive, rocks in the paleosol and overlying black shale. The advection of relatively cold fluid in the lower part of the coal seam streaming towards the dike may have provided cooling for floor rock close to the coal near the contact. In contrast, roof rock close to the contact had a higher R o value than the paleosol (R o = 2.56%) in the absence of cooling.","publication_date":{"day":1,"month":9,"year":2016,"errors":{}},"publication_name":"International Journal of Coal Geology","grobid_abstract_attachment_id":114935262},"translated_abstract":null,"internal_url":"https://www.academia.edu/119548993/Dike_induced_thermal_alteration_of_the_Springfield_Coal_Member_Pennsylvanian_and_adjacent_clastic_rocks_Illinois_Basin_USA","translated_internal_url":"","created_at":"2024-05-19T13:54:36.379-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":34137,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[{"id":114935262,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/114935262/thumbnails/1.jpg","file_name":"j.coal.2016.07.00520240519-1-hmjuh1.pdf","download_url":"https://www.academia.edu/attachments/114935262/download_file?st=MTczMjc1NzUxNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Dike_induced_thermal_alteration_of_the_S.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/114935262/j.coal.2016.07.00520240519-1-hmjuh1-libre.pdf?1716168026=\u0026response-content-disposition=attachment%3B+filename%3DDike_induced_thermal_alteration_of_the_S.pdf\u0026Expires=1732740456\u0026Signature=FHGyCT31ughg6XDGcBhSkTH8DKYsGs7LWS~npM1QQbqZpxF1Sgom818PQOrdvltkN2dGemIXPWmZ2PAu5NWerezD8zRjxcnq9XwI6ZmtNtyqOO63~kLaOLEEFyD43Xy4pFzP4UgpTcykkLhhxjMePdWC9NMHNyYxPBAbJ2VKxSW-d5vEndyIT8Wt8dcShml5o-RSdtr6DO~oArDHPTgBjufOyIeJ9wZj6wiWJq8h4EdBe~PBSw2-y2qlhX97-FpmpwY30DYXBVzisVDNTgzNCnZAREiPSsAdsxtb2~D8uHr2nAFwJsUTN77oO2mMLMSLA11xe2BYUOee8gsM-r7gGQ__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"slug":"Dike_induced_thermal_alteration_of_the_Springfield_Coal_Member_Pennsylvanian_and_adjacent_clastic_rocks_Illinois_Basin_USA","translated_slug":"","page_count":10,"language":"en","content_type":"Work","owner":{"id":34137,"first_name":"Arndt","middle_initials":null,"last_name":"Schimmelmann","page_name":"ArndtSchimmelmann","domain_name":"indiana","created_at":"2009-03-07T08:57:01.308-08:00","display_name":"Arndt Schimmelmann","url":"https://indiana.academia.edu/ArndtSchimmelmann"},"attachments":[{"id":114935262,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/114935262/thumbnails/1.jpg","file_name":"j.coal.2016.07.00520240519-1-hmjuh1.pdf","download_url":"https://www.academia.edu/attachments/114935262/download_file?st=MTczMjc1NzUxNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Dike_induced_thermal_alteration_of_the_S.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/114935262/j.coal.2016.07.00520240519-1-hmjuh1-libre.pdf?1716168026=\u0026response-content-disposition=attachment%3B+filename%3DDike_induced_thermal_alteration_of_the_S.pdf\u0026Expires=1732740456\u0026Signature=FHGyCT31ughg6XDGcBhSkTH8DKYsGs7LWS~npM1QQbqZpxF1Sgom818PQOrdvltkN2dGemIXPWmZ2PAu5NWerezD8zRjxcnq9XwI6ZmtNtyqOO63~kLaOLEEFyD43Xy4pFzP4UgpTcykkLhhxjMePdWC9NMHNyYxPBAbJ2VKxSW-d5vEndyIT8Wt8dcShml5o-RSdtr6DO~oArDHPTgBjufOyIeJ9wZj6wiWJq8h4EdBe~PBSw2-y2qlhX97-FpmpwY30DYXBVzisVDNTgzNCnZAREiPSsAdsxtb2~D8uHr2nAFwJsUTN77oO2mMLMSLA11xe2BYUOee8gsM-r7gGQ__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"research_interests":[{"id":406,"name":"Geology","url":"https://www.academia.edu/Documents/in/Geology"},{"id":33451,"name":"Oil Shale","url":"https://www.academia.edu/Documents/in/Oil_Shale"},{"id":127831,"name":"Coal Geology","url":"https://www.academia.edu/Documents/in/Coal_Geology"},{"id":197587,"name":"Dike","url":"https://www.academia.edu/Documents/in/Dike"},{"id":331681,"name":"Pennsylvanian","url":"https://www.academia.edu/Documents/in/Pennsylvanian"},{"id":2502039,"name":"vitrinite","url":"https://www.academia.edu/Documents/in/vitrinite"}],"urls":[{"id":42114254,"url":"https://doi.org/10.1016/j.coal.2016.07.005"}]}, dispatcherData: dispatcherData }); 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Without a long written history in Vietnam, we need to rely on geoarchives such as lake sediments to reconstruct past monsoon variability and regional paleoenvironmental fluctuations and evaluate current climatic trends. Natural lakes in the Central Highlands of Vietnam have the potential to have recorded shifts of the monsoon belt over glacial/interglacial cycles. Since 2016, the EOS Geoscience Research Group at Vietnam National University, Hanoi (EOS group) has collaborated with international partners to collect and analyze Vietnamese lake sediments to reconstruct the Pleistocene-Holocene climate history. Numerous sediment cores have been retrieved from Biển Hồ, Ia Bang, Ea Tyn, Ea Sno and Lak lakes between 2016 and 2022. Of special importance is a 25 m long sediment core from Biển Hồ Lake (Gia Lai province) covering the last 57 ka, which the team retrieved in April 2021. 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Without a long written history in Vietnam, we need to rely on geoarchives such as lake sediments to reconstruct past monsoon variability and regional paleoenvironmental fluctuations and evaluate current climatic trends. Natural lakes in the Central Highlands of Vietnam have the potential to have recorded shifts of the monsoon belt over glacial/interglacial cycles. Since 2016, the EOS Geoscience Research Group at Vietnam National University, Hanoi (EOS group) has collaborated with international partners to collect and analyze Vietnamese lake sediments to reconstruct the Pleistocene-Holocene climate history. Numerous sediment cores have been retrieved from Biển Hồ, Ia Bang, Ea Tyn, Ea Sno and Lak lakes between 2016 and 2022. Of special importance is a 25 m long sediment core from Biển Hồ Lake (Gia Lai province) covering the last 57 ka, which the team retrieved in April 2021. Sedime...","publisher":"Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)","publication_name":"Vietnam Journal of Earth Sciences"},"translated_abstract":"Global warming enhances atmospheric moisture loading and will likely affect monsoon strength in Vietnam. Without a long written history in Vietnam, we need to rely on geoarchives such as lake sediments to reconstruct past monsoon variability and regional paleoenvironmental fluctuations and evaluate current climatic trends. Natural lakes in the Central Highlands of Vietnam have the potential to have recorded shifts of the monsoon belt over glacial/interglacial cycles. Since 2016, the EOS Geoscience Research Group at Vietnam National University, Hanoi (EOS group) has collaborated with international partners to collect and analyze Vietnamese lake sediments to reconstruct the Pleistocene-Holocene climate history. Numerous sediment cores have been retrieved from Biển Hồ, Ia Bang, Ea Tyn, Ea Sno and Lak lakes between 2016 and 2022. Of special importance is a 25 m long sediment core from Biển Hồ Lake (Gia Lai province) covering the last 57 ka, which the team retrieved in April 2021. 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The Southeast Asian tropics remain severely under-represented in paleoenvironmental and paleoclimatic reconstructions, although a few recent paleoclimate studies evaluated the variability, position and strength of the main Asian monsoon systems at different timescales from modern records to the last 15,000 years. Comparable data from Việt Nam, however, are scarce although Việt Nam and its Central Highlands are critically located at the intersection of the East Asian Summer Monsoon and the Indian Summer Monsoon with highly important socio-ecological consequences from changes in the climate system. This study presents a high-resolution sedimentary climate record from Ea Tyn Lake in Việt Nam’s Central Highlands covering the last 1250 years. Using geochemical and sedimentological proxies and principal com...</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="119548982"><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="119548982"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 119548982; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=119548982]").text(description); $(".js-view-count[data-work-id=119548982]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 119548982; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='119548982']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 119548982, 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" } } $('.js-work-strip[data-work-id=119548982]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":119548982,"title":"A high-resolution, 1250-year long drought record from Ea Tyn Lake, Central Highlands of Việt Nam","translated_title":"","metadata":{"abstract":"An understanding of past climatic variability at regional to local scales is mandatory for a proper evaluation of current and potential future repercussions from global climate change. 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$(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="119548975"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" rel="nofollow" href="https://www.academia.edu/119548975/Evidence_for_the_Role_of_Water_in_Ch4_Generation_from_Long_Term_Low_Temperature_Experimental_Maturation_of_Immature_Shales"><img alt="Research paper thumbnail of Evidence for the Role of Water in Ch4 Generation from Long-Term, Low Temperature Experimental Maturation of Immature Shales" 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" rel="nofollow" href="https://www.academia.edu/119548975/Evidence_for_the_Role_of_Water_in_Ch4_Generation_from_Long_Term_Low_Temperature_Experimental_Maturation_of_Immature_Shales">Evidence for the Role of Water in Ch4 Generation from Long-Term, Low Temperature Experimental Maturation of Immature Shales</a></div><div class="wp-workCard_item"><span>30th International Meeting on Organic Geochemistry (IMOG 2021)</span><span>, 2021</span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Summary The conventional paradigm for generation of economically viable petroleum reserves involv...</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">Summary The conventional paradigm for generation of economically viable petroleum reserves involves thermal cleavage of C-C bonds within sedimentary organic matter. However, there is evidence for alternative chemical pathways yielding non-microbial methane generation at low temperatures. In addition, assessing the role of water in methane generation at temperatures lower than those required for it to form by thermal cracking represents a critical step for evaluating processes likely involved in catalytic methanogenesis. Previous pyrolysis experiments of source rocks in the presence and absence of water have yielded insights on the role of water in CH4 generation at a range of maturities including late-stage thermogenesis. Our studies explore the role of catalytic pathways in CH4 generation by experiments simulating maturation of immature source rocks at temperatures insufficient to achieve thermal cleavage of C-C bonds. These hydrous maturation experiments demonstrate that immature shales can generate CH4 at temperatures (80–100 °C). They establish the potential to yield δ13C values &lt;-70 ‰ commonly associated with microbial gas by early CH4 generation at low maturity levels. Incorporation of 2H derived from 2H-enriched water in these hydrous maturation experiments confirms the role of water in catalytic processes generating CH4 at low temperatures.</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="119548975"><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="119548975"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 119548975; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=119548975]").text(description); $(".js-view-count[data-work-id=119548975]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 119548975; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='119548975']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 119548975, 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" } } $('.js-work-strip[data-work-id=119548975]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":119548975,"title":"Evidence for the Role of Water in Ch4 Generation from Long-Term, Low Temperature Experimental Maturation of Immature Shales","translated_title":"","metadata":{"abstract":"Summary The conventional paradigm for generation of economically viable petroleum reserves involves thermal cleavage of C-C bonds within sedimentary organic matter. However, there is evidence for alternative chemical pathways yielding non-microbial methane generation at low temperatures. In addition, assessing the role of water in methane generation at temperatures lower than those required for it to form by thermal cracking represents a critical step for evaluating processes likely involved in catalytic methanogenesis. Previous pyrolysis experiments of source rocks in the presence and absence of water have yielded insights on the role of water in CH4 generation at a range of maturities including late-stage thermogenesis. Our studies explore the role of catalytic pathways in CH4 generation by experiments simulating maturation of immature source rocks at temperatures insufficient to achieve thermal cleavage of C-C bonds. These hydrous maturation experiments demonstrate that immature shales can generate CH4 at temperatures (80–100 °C). They establish the potential to yield δ13C values \u0026lt;-70 ‰ commonly associated with microbial gas by early CH4 generation at low maturity levels. Incorporation of 2H derived from 2H-enriched water in these hydrous maturation experiments confirms the role of water in catalytic processes generating CH4 at low temperatures.","publisher":"European Association of Geoscientists \u0026 Engineers","publication_date":{"day":null,"month":null,"year":2021,"errors":{}},"publication_name":"30th International Meeting on Organic Geochemistry (IMOG 2021)"},"translated_abstract":"Summary The conventional paradigm for generation of economically viable petroleum reserves involves thermal cleavage of C-C bonds within sedimentary organic matter. However, there is evidence for alternative chemical pathways yielding non-microbial methane generation at low temperatures. 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$(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="4588854" id="2013papers"><div class="js-work-strip profile--work_container" data-work-id="21825801"><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/21825801/Environmental_trophic_and_ecological_factors_influencing_bone_collagen_d_2_H"><img alt="Research paper thumbnail of Environmental, trophic, and ecological factors influencing bone collagen d 2 H" class="work-thumbnail" src="https://attachments.academia-assets.com/42577897/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/21825801/Environmental_trophic_and_ecological_factors_influencing_bone_collagen_d_2_H">Environmental, trophic, and ecological factors influencing bone collagen d 2 H</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://indiana.academia.edu/PDavidPolly">P. David Polly</a> and <a class="" data-click-track="profile-work-strip-authors" href="https://indiana.academia.edu/ArndtSchimmelmann">Arndt Schimmelmann</a></span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Organic deuterium/hydrogen stable isotope ratios (i.e., 2 H/ 1 H, expressed as d 2 H value in &) ...</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">Organic deuterium/hydrogen stable isotope ratios (i.e., 2 H/ 1 H, expressed as d 2 H value in &) in animal tissues are related to the 2 H/ 1 H in diet and ingested water. Bone collagen preserves the biochemical 2 H/ 1 H isotopic signal in the d 2 H value of col-lagen's non-exchangeable hydrogen. Therefore, d 2 H preserved in bone collagen has the potential to constrain environmental and trophic conditions, which is of interest to researchers studying of both living and fossil vertebrates. Our data examine the relationship of d 2 H values of collagen with geographic variation in d 2 H of meteoric waters, with local variations in the ecology and trophic level of species, and with the transition from mother's milk to adult diet. Based on 97 individuals from 22 marine and terrestrial vertebrates (predominately mammals), we found the relationships of collagen d 2 H to both geographic variation in meteoric water d 2 H (R 2 = 0.55) and to d 15 N in bone collagen (R 2 = 0.17) statistically significant but weaker than previously reported. The second strongest control on collagen d 2 H in our data is dietary, with nearly 50 percent of the variance in d 2 H explained by trophic level (R 2 = 0.47). Trophic level effects potentially confound the local meteoric signal if not held constant: herbivores tend to have the lowest d 2 H values, omnivores have intermediate ones, and carnivores have the highest values. Body size (most likely related to mass-specific metabolic rates) has a strong influence on collagen d 2 H (R 2 = 0.30), by causing greater sensitivity in smaller animals to seasonal climate variations and/or high evapotranspiration leading to 2 H-enrichment in tissues. In marine mammals weaning produces a dramatic effect on collagen d 2 H with adult values being universally higher than pup values (R 2 = 0.79). Interestingly, the shift in d 15 N at weaning is downward, even though normally hydrogen and nitrogen isotope ratios are positively correlated with one another in respect to trophic level. Our findings suggest that in car-nivores, which have an especially high variance in d 2 H, large samples are needed to separate signals from precipitation, tro-phic level, body size, and age. For d 2 H of fossil collagen to be useful as a proxy of environmental or dietary information, these confounding effects need to be understood, which means careful selection of a study species. Further, d 2 H from a single fossil bone collagen is likely to be uninterpretable.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="0e2c3f55a27545fbda12831a9765fbe3" class="wp-workCard--action" rel="nofollow" data-click-track="profile-work-strip-download" data-download="{"attachment_id":42577897,"asset_id":21825801,"asset_type":"Work","button_location":"profile"}" href="https://www.academia.edu/attachments/42577897/download_file?st=MTczMjc1NzUxNCw4LjIyMi4yMDguMTQ2&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="21825801"><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="21825801"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 21825801; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=21825801]").text(description); $(".js-view-count[data-work-id=21825801]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 21825801; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='21825801']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 21825801, 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: "0e2c3f55a27545fbda12831a9765fbe3" } } $('.js-work-strip[data-work-id=21825801]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":21825801,"title":"Environmental, trophic, and ecological factors influencing bone collagen d 2 H","translated_title":"","metadata":{"abstract":"Organic deuterium/hydrogen stable isotope ratios (i.e., 2 H/ 1 H, expressed as d 2 H value in \u0026) in animal tissues are related to the 2 H/ 1 H in diet and ingested water. Bone collagen preserves the biochemical 2 H/ 1 H isotopic signal in the d 2 H value of col-lagen's non-exchangeable hydrogen. Therefore, d 2 H preserved in bone collagen has the potential to constrain environmental and trophic conditions, which is of interest to researchers studying of both living and fossil vertebrates. Our data examine the relationship of d 2 H values of collagen with geographic variation in d 2 H of meteoric waters, with local variations in the ecology and trophic level of species, and with the transition from mother's milk to adult diet. Based on 97 individuals from 22 marine and terrestrial vertebrates (predominately mammals), we found the relationships of collagen d 2 H to both geographic variation in meteoric water d 2 H (R 2 = 0.55) and to d 15 N in bone collagen (R 2 = 0.17) statistically significant but weaker than previously reported. The second strongest control on collagen d 2 H in our data is dietary, with nearly 50 percent of the variance in d 2 H explained by trophic level (R 2 = 0.47). Trophic level effects potentially confound the local meteoric signal if not held constant: herbivores tend to have the lowest d 2 H values, omnivores have intermediate ones, and carnivores have the highest values. Body size (most likely related to mass-specific metabolic rates) has a strong influence on collagen d 2 H (R 2 = 0.30), by causing greater sensitivity in smaller animals to seasonal climate variations and/or high evapotranspiration leading to 2 H-enrichment in tissues. In marine mammals weaning produces a dramatic effect on collagen d 2 H with adult values being universally higher than pup values (R 2 = 0.79). Interestingly, the shift in d 15 N at weaning is downward, even though normally hydrogen and nitrogen isotope ratios are positively correlated with one another in respect to trophic level. Our findings suggest that in car-nivores, which have an especially high variance in d 2 H, large samples are needed to separate signals from precipitation, tro-phic level, body size, and age. For d 2 H of fossil collagen to be useful as a proxy of environmental or dietary information, these confounding effects need to be understood, which means careful selection of a study species. Further, d 2 H from a single fossil bone collagen is likely to be uninterpretable."},"translated_abstract":"Organic deuterium/hydrogen stable isotope ratios (i.e., 2 H/ 1 H, expressed as d 2 H value in \u0026) in animal tissues are related to the 2 H/ 1 H in diet and ingested water. Bone collagen preserves the biochemical 2 H/ 1 H isotopic signal in the d 2 H value of col-lagen's non-exchangeable hydrogen. Therefore, d 2 H preserved in bone collagen has the potential to constrain environmental and trophic conditions, which is of interest to researchers studying of both living and fossil vertebrates. Our data examine the relationship of d 2 H values of collagen with geographic variation in d 2 H of meteoric waters, with local variations in the ecology and trophic level of species, and with the transition from mother's milk to adult diet. Based on 97 individuals from 22 marine and terrestrial vertebrates (predominately mammals), we found the relationships of collagen d 2 H to both geographic variation in meteoric water d 2 H (R 2 = 0.55) and to d 15 N in bone collagen (R 2 = 0.17) statistically significant but weaker than previously reported. The second strongest control on collagen d 2 H in our data is dietary, with nearly 50 percent of the variance in d 2 H explained by trophic level (R 2 = 0.47). Trophic level effects potentially confound the local meteoric signal if not held constant: herbivores tend to have the lowest d 2 H values, omnivores have intermediate ones, and carnivores have the highest values. Body size (most likely related to mass-specific metabolic rates) has a strong influence on collagen d 2 H (R 2 = 0.30), by causing greater sensitivity in smaller animals to seasonal climate variations and/or high evapotranspiration leading to 2 H-enrichment in tissues. In marine mammals weaning produces a dramatic effect on collagen d 2 H with adult values being universally higher than pup values (R 2 = 0.79). Interestingly, the shift in d 15 N at weaning is downward, even though normally hydrogen and nitrogen isotope ratios are positively correlated with one another in respect to trophic level. Our findings suggest that in car-nivores, which have an especially high variance in d 2 H, large samples are needed to separate signals from precipitation, tro-phic level, body size, and age. For d 2 H of fossil collagen to be useful as a proxy of environmental or dietary information, these confounding effects need to be understood, which means careful selection of a study species. Further, d 2 H from a single fossil bone collagen is likely to be uninterpretable.","internal_url":"https://www.academia.edu/21825801/Environmental_trophic_and_ecological_factors_influencing_bone_collagen_d_2_H","translated_internal_url":"","created_at":"2016-02-11T05:39:37.431-08:00","preview_url":null,"current_user_can_edit":false,"current_user_is_owner":null,"owner_id":40801603,"coauthors_can_edit":false,"document_type":"other","co_author_tags":[{"id":15162708,"work_id":21825801,"tagging_user_id":40801603,"tagged_user_id":34137,"co_author_invite_id":null,"email":"a***e@indiana.edu","affiliation":"Indiana University","display_order":0,"name":"Arndt Schimmelmann","title":"Environmental, trophic, and ecological factors influencing bone collagen d 2 H"}],"downloadable_attachments":[{"id":42577897,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/42577897/thumbnails/1.jpg","file_name":"Topalov_et_al_2013_GCA.pdf","download_url":"https://www.academia.edu/attachments/42577897/download_file?st=MTczMjc1NzUxNCw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Environmental_trophic_and_ecological_fac.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/42577897/Topalov_et_al_2013_GCA-libre.pdf?1455218726=\u0026response-content-disposition=attachment%3B+filename%3DEnvironmental_trophic_and_ecological_fac.pdf\u0026Expires=1732516482\u0026Signature=YvvQ6Fz9moiRCO8OIf~Hx~yooUsKIxrCIR2l8YYD-dolSV4E6hxnjps4skzlXv1c2UDTwg4A54JWBK8D~U3gOUCcQMK6Vq8Y53UgeuAJNsGXNzTjXBIbiSGaE3kl4kosNXjDfzp6bNxN3dDcILGpkVBWdUOM9qeX21mEBQuJuZeiNfGqHypHVSsrCSXF0i4hUWJJlmX7oP-uX1WghQ6op3oG~WQyX~azold3nW8XrEm0fM1GQdx888hdgpvPwVzmIO8iVkai5oJFICdyIbcBLbAl8BHtA5CM4kYfyAl9y1Kku-wgOhS3ixoW3sZIQAy~s23Z1rDp6niGuu32B7O~8Q__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"slug":"Environmental_trophic_and_ecological_factors_influencing_bone_collagen_d_2_H","translated_slug":"","page_count":17,"language":"en","content_type":"Work","owner":{"id":40801603,"first_name":"P. 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