Calcium isotope constraints on the end-Permian mass extinction
The end-Permian mass extinction horizon is marked by an abrupt shift in style of carbonate sedimentation and a negative excursion in the carbon isotope (δ13C) composition of carbonate minerals. Several extinction scenarios consistent with these observations have been put forward. Secular variation i...
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ftpubmed:oai:pubmedcentral.nih.gov:2889361 2023-05-15T17:51:20+02:00 Calcium isotope constraints on the end-Permian mass extinction Payne, Jonathan L. Turchyn, Alexandra V. Paytan, Adina DePaolo, Donald J. Lehrmann, Daniel J. Yu, Meiyi Wei, Jiayong 2010-05-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2889361 http://www.ncbi.nlm.nih.gov/pubmed/20421502 https://doi.org/10.1073/pnas.0914065107 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2889361 http://www.ncbi.nlm.nih.gov/pubmed/20421502 http://dx.doi.org/10.1073/pnas.0914065107 Freely available online through the PNAS open access option. Physical Sciences Text 2010 ftpubmed https://doi.org/10.1073/pnas.0914065107 2013-09-03T01:40:16Z The end-Permian mass extinction horizon is marked by an abrupt shift in style of carbonate sedimentation and a negative excursion in the carbon isotope (δ13C) composition of carbonate minerals. Several extinction scenarios consistent with these observations have been put forward. Secular variation in the calcium isotope (δ44/40Ca) composition of marine sediments provides a tool for distinguishing among these possibilities and thereby constraining the causes of mass extinction. Here we report δ44/40Ca across the Permian-Triassic boundary from marine limestone in south China. The δ44/40Ca exhibits a transient negative excursion of ∼0.3‰ over a few hundred thousand years or less, which we interpret to reflect a change in the global δ44/40Ca composition of seawater. CO2-driven ocean acidification best explains the coincidence of the δ44/40Ca excursion with negative excursions in the δ13C of carbonates and organic matter and the preferential extinction of heavily calcified marine animals. Calcium isotope constraints on carbon cycle calculations suggest that the average δ13C of CO2 released was heavier than -28‰ and more likely near -15‰; these values indicate a source containing substantial amounts of mantle- or carbonate-derived carbon. Collectively, the results point toward Siberian Trap volcanism as the trigger of mass extinction. Text Ocean acidification PubMed Central (PMC) Proceedings of the National Academy of Sciences 107 19 8543 8548 |
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Physical Sciences |
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Physical Sciences Payne, Jonathan L. Turchyn, Alexandra V. Paytan, Adina DePaolo, Donald J. Lehrmann, Daniel J. Yu, Meiyi Wei, Jiayong Calcium isotope constraints on the end-Permian mass extinction |
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Physical Sciences |
description |
The end-Permian mass extinction horizon is marked by an abrupt shift in style of carbonate sedimentation and a negative excursion in the carbon isotope (δ13C) composition of carbonate minerals. Several extinction scenarios consistent with these observations have been put forward. Secular variation in the calcium isotope (δ44/40Ca) composition of marine sediments provides a tool for distinguishing among these possibilities and thereby constraining the causes of mass extinction. Here we report δ44/40Ca across the Permian-Triassic boundary from marine limestone in south China. The δ44/40Ca exhibits a transient negative excursion of ∼0.3‰ over a few hundred thousand years or less, which we interpret to reflect a change in the global δ44/40Ca composition of seawater. CO2-driven ocean acidification best explains the coincidence of the δ44/40Ca excursion with negative excursions in the δ13C of carbonates and organic matter and the preferential extinction of heavily calcified marine animals. Calcium isotope constraints on carbon cycle calculations suggest that the average δ13C of CO2 released was heavier than -28‰ and more likely near -15‰; these values indicate a source containing substantial amounts of mantle- or carbonate-derived carbon. Collectively, the results point toward Siberian Trap volcanism as the trigger of mass extinction. |
format |
Text |
author |
Payne, Jonathan L. Turchyn, Alexandra V. Paytan, Adina DePaolo, Donald J. Lehrmann, Daniel J. Yu, Meiyi Wei, Jiayong |
author_facet |
Payne, Jonathan L. Turchyn, Alexandra V. Paytan, Adina DePaolo, Donald J. Lehrmann, Daniel J. Yu, Meiyi Wei, Jiayong |
author_sort |
Payne, Jonathan L. |
title |
Calcium isotope constraints on the end-Permian mass extinction |
title_short |
Calcium isotope constraints on the end-Permian mass extinction |
title_full |
Calcium isotope constraints on the end-Permian mass extinction |
title_fullStr |
Calcium isotope constraints on the end-Permian mass extinction |
title_full_unstemmed |
Calcium isotope constraints on the end-Permian mass extinction |
title_sort |
calcium isotope constraints on the end-permian mass extinction |
publisher |
National Academy of Sciences |
publishDate |
2010 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2889361 http://www.ncbi.nlm.nih.gov/pubmed/20421502 https://doi.org/10.1073/pnas.0914065107 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2889361 http://www.ncbi.nlm.nih.gov/pubmed/20421502 http://dx.doi.org/10.1073/pnas.0914065107 |
op_rights |
Freely available online through the PNAS open access option. |
op_doi |
https://doi.org/10.1073/pnas.0914065107 |
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Proceedings of the National Academy of Sciences |
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107 |
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19 |
container_start_page |
8543 |
op_container_end_page |
8548 |
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1766158437432950784 |