Global perturbation of the marine calcium cycle during the Permian-Triassic transition
A negative shift in the calcium isotopic composition of marine carbonate rocks spanning the end-Permian extinction horizon in South China has been used to argue for an ocean acidification event coincident with mass extinction. This interpretation has proven controversial, both because the excursion...
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Geological Society of America
2018
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Online Access: | https://hdl.handle.net/11511/35442 https://doi.org/10.1130/b31818.1 |
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ftmetuankair:oai:open.metu.edu.tr:11511/35442 2023-05-15T17:51:06+02:00 Global perturbation of the marine calcium cycle during the Permian-Triassic transition Silva-Tamayo, Juan Carlos Lau, Kimberly Jost, Adam B. Payne, Jonathan L. Wignall, Paul B. Newton, Robert J. Eisenhauer, Anton Depaolo, Donald J. Brown, Shaun Maher, Kate Lehrmann, Daniel J. Altıner, Demir Yu, Meiyi Richoz, Sylvain Paytan, Adina 2018-07-01 application/pdf https://hdl.handle.net/11511/35442 https://doi.org/10.1130/b31818.1 unknown Geological Society of America GEOLOGICAL SOCIETY OF AMERICA BULLETIN Silva-Tamayo J. C. , Lau K., Jost A. B. , Payne J. L. , Wignall P. B. , Newton R. J. , Eisenhauer A., Depaolo D. J. , Brown S., Maher K., et al., "Global perturbation of the marine calcium cycle during the Permian-Triassic transition", GEOLOGICAL SOCIETY OF AMERICA BULLETIN, cilt.130, ss.1323-1338, 2018 doi:10.1130/b31818.1 1338 0016-7606 85049218797 1323 https://hdl.handle.net/11511/35442 130 WOS:000437009200017 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Geology Journal Article 2018 ftmetuankair https://doi.org/10.1130/b31818.1 2020-10-28T15:28:21Z A negative shift in the calcium isotopic composition of marine carbonate rocks spanning the end-Permian extinction horizon in South China has been used to argue for an ocean acidification event coincident with mass extinction. This interpretation has proven controversial, both because the excursion has not been demonstrated across multiple, widely separated localities, and because modeling results of coupled carbon and calcium isotope records illustrate that calcium cycle imbalances alone cannot account for the full magnitude of the isotope excursion. Here, we further test potential controls on the Permian-Triassic calcium isotope record by measuring calcium isotope ratios from shallow-marine carbonate successions spanning the Permian-Triassic boundary in Turkey, Italy, and Oman. All measured sections display negative shifts in delta Ca-44/40 of up to 0.6 parts per thousand. Consistency in the direction, magnitude, and timing of the calcium isotope excursion across these widely separated localities implies a primary and global delta Ca-44/40 signature. Based on the results of a coupled box model of the geological carbon and calcium cycles, we interpret the excursion to reflect a series of consequences arising from volcanic CO2 release, including a temporary decrease in seawater delta Ca-44/40 due to short-lived ocean acidification and a more protracted increase in calcium isotope fractionation associated with a shift toward more primary aragonite in the sediment and, potentially, subsequently elevated carbonate saturation states caused by the persistence of elevated CO2 delivery from volcanism. Locally, changing balances between aragonite and calcite production are sufficient to account for the calcium isotope excursions, but this effect alone does not explain the globally observed negative excursion in the delta C-13 values of carbonate sediments and organic matter as well. Only a carbon release event and related geochemical consequences are consistent both with calcium and carbon isotope data. The carbon release scenario can also account for oxygen isotope evidence for dramatic and protracted global warming as well as paleontological evidence for the preferential extinction of marine animals most susceptible to acidification, warming, and anoxia. Article in Journal/Newspaper Ocean acidification OpenMETU (Middle East Technical University) GSA Bulletin 130 7-8 1323 1338 |
institution |
Open Polar |
collection |
OpenMETU (Middle East Technical University) |
op_collection_id |
ftmetuankair |
language |
unknown |
topic |
Geology |
spellingShingle |
Geology Silva-Tamayo, Juan Carlos Lau, Kimberly Jost, Adam B. Payne, Jonathan L. Wignall, Paul B. Newton, Robert J. Eisenhauer, Anton Depaolo, Donald J. Brown, Shaun Maher, Kate Lehrmann, Daniel J. Altıner, Demir Yu, Meiyi Richoz, Sylvain Paytan, Adina Global perturbation of the marine calcium cycle during the Permian-Triassic transition |
topic_facet |
Geology |
description |
A negative shift in the calcium isotopic composition of marine carbonate rocks spanning the end-Permian extinction horizon in South China has been used to argue for an ocean acidification event coincident with mass extinction. This interpretation has proven controversial, both because the excursion has not been demonstrated across multiple, widely separated localities, and because modeling results of coupled carbon and calcium isotope records illustrate that calcium cycle imbalances alone cannot account for the full magnitude of the isotope excursion. Here, we further test potential controls on the Permian-Triassic calcium isotope record by measuring calcium isotope ratios from shallow-marine carbonate successions spanning the Permian-Triassic boundary in Turkey, Italy, and Oman. All measured sections display negative shifts in delta Ca-44/40 of up to 0.6 parts per thousand. Consistency in the direction, magnitude, and timing of the calcium isotope excursion across these widely separated localities implies a primary and global delta Ca-44/40 signature. Based on the results of a coupled box model of the geological carbon and calcium cycles, we interpret the excursion to reflect a series of consequences arising from volcanic CO2 release, including a temporary decrease in seawater delta Ca-44/40 due to short-lived ocean acidification and a more protracted increase in calcium isotope fractionation associated with a shift toward more primary aragonite in the sediment and, potentially, subsequently elevated carbonate saturation states caused by the persistence of elevated CO2 delivery from volcanism. Locally, changing balances between aragonite and calcite production are sufficient to account for the calcium isotope excursions, but this effect alone does not explain the globally observed negative excursion in the delta C-13 values of carbonate sediments and organic matter as well. Only a carbon release event and related geochemical consequences are consistent both with calcium and carbon isotope data. The carbon release scenario can also account for oxygen isotope evidence for dramatic and protracted global warming as well as paleontological evidence for the preferential extinction of marine animals most susceptible to acidification, warming, and anoxia. |
format |
Article in Journal/Newspaper |
author |
Silva-Tamayo, Juan Carlos Lau, Kimberly Jost, Adam B. Payne, Jonathan L. Wignall, Paul B. Newton, Robert J. Eisenhauer, Anton Depaolo, Donald J. Brown, Shaun Maher, Kate Lehrmann, Daniel J. Altıner, Demir Yu, Meiyi Richoz, Sylvain Paytan, Adina |
author_facet |
Silva-Tamayo, Juan Carlos Lau, Kimberly Jost, Adam B. Payne, Jonathan L. Wignall, Paul B. Newton, Robert J. Eisenhauer, Anton Depaolo, Donald J. Brown, Shaun Maher, Kate Lehrmann, Daniel J. Altıner, Demir Yu, Meiyi Richoz, Sylvain Paytan, Adina |
author_sort |
Silva-Tamayo, Juan Carlos |
title |
Global perturbation of the marine calcium cycle during the Permian-Triassic transition |
title_short |
Global perturbation of the marine calcium cycle during the Permian-Triassic transition |
title_full |
Global perturbation of the marine calcium cycle during the Permian-Triassic transition |
title_fullStr |
Global perturbation of the marine calcium cycle during the Permian-Triassic transition |
title_full_unstemmed |
Global perturbation of the marine calcium cycle during the Permian-Triassic transition |
title_sort |
global perturbation of the marine calcium cycle during the permian-triassic transition |
publisher |
Geological Society of America |
publishDate |
2018 |
url |
https://hdl.handle.net/11511/35442 https://doi.org/10.1130/b31818.1 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Silva-Tamayo J. C. , Lau K., Jost A. B. , Payne J. L. , Wignall P. B. , Newton R. J. , Eisenhauer A., Depaolo D. J. , Brown S., Maher K., et al., "Global perturbation of the marine calcium cycle during the Permian-Triassic transition", GEOLOGICAL SOCIETY OF AMERICA BULLETIN, cilt.130, ss.1323-1338, 2018 doi:10.1130/b31818.1 1338 0016-7606 85049218797 1323 https://hdl.handle.net/11511/35442 130 WOS:000437009200017 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1130/b31818.1 |
container_title |
GSA Bulletin |
container_volume |
130 |
container_issue |
7-8 |
container_start_page |
1323 |
op_container_end_page |
1338 |
_version_ |
1766158118036701184 |