Coupled delta Ca-44/40, delta Sr-88/86, and Sr-87/Sr-86 geochemistry across the end-Permian mass extinction event
We report high-resolution, high-precision delta Ca-44/40, delta Sr-88/86, and Sr-87/Sr-86 records spanning the Permian-Triassic boundary (PTB) from the Meishan and Dajiang carbonate successions in south China. The goal of the study was to understand the behavior of Ca and Sr isotopes during a time p...
Published in: | Geochimica et Cosmochimica Acta |
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Language: | English |
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Online Access: | http://ir.nigpas.ac.cn/handle/332004/27796 https://doi.org/10.1016/j.gca.2019.07.035 |
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ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/27796 2023-05-15T17:51:12+02:00 Coupled delta Ca-44/40, delta Sr-88/86, and Sr-87/Sr-86 geochemistry across the end-Permian mass extinction event Wang, Jiuyuan Jacobson, Andrew D. Zhang, Hua Ramezani, Jahandar Sageman, Bradley B. Hurtgen, Matthew T. Bowring, Samuel A. Shen, Shu-Zhong 2019-10-01 http://ir.nigpas.ac.cn/handle/332004/27796 https://doi.org/10.1016/j.gca.2019.07.035 英语 eng PERGAMON-ELSEVIER SCIENCE LTD GEOCHIMICA ET COSMOCHIMICA ACTA http://ir.nigpas.ac.cn/handle/332004/27796 doi:10.1016/j.gca.2019.07.035 Calcium isotopes Radiogenic Sr isotopes Stable Sr isotopes end-Permian Chemical weathering Diagenesis CALCIUM ISOTOPE FRACTIONATION STABLE SR-ISOTOPE MULTICOMPONENT CARBONATE SYSTEM EARLY MARINE DIAGENESIS PHOTIC-ZONE EUXINIA TRIASSIC BOUNDARY SOUTH CHINA OCEAN ACIDIFICATION NANPANJIANG BASIN TRACE-ELEMENT Geochemistry & Geophysics 期刊论文 2019 ftchinacscnigpas https://doi.org/10.1016/j.gca.2019.07.035 2019-12-27T01:06:03Z We report high-resolution, high-precision delta Ca-44/40, delta Sr-88/86, and Sr-87/Sr-86 records spanning the Permian-Triassic boundary (PTB) from the Meishan and Dajiang carbonate successions in south China. The goal of the study was to understand the behavior of Ca and Sr isotopes during a time period in Earth history characterized by severe biological and environmental perturbations, including a major mass extinction, flood basalt volcanism, ocean acidification, and sea level fluctuations. Dajiang displays negative delta Ca-44/40 and delta Sr-88/86 excursions and invariant Sr-87/Sr-86 ratios in the <60 kyr timeframe between the main extinction horizon and the PTB. The Meishan delta Ca-44/40 and delta Sr-88/86 records are generally shifted to higher values and display both synchronous and asynchronous trends relative to Dajiang. In addition, Sr-87/Sr-86 ratios at Meishan are significantly elevated and do not define a clear secular pattern. We reconcile diverse conceptual models for the dataset with the aid of supporting elemental and isotope measurements (e.g., Sr/Ca, delta C-13, and delta O-18), as well as sequential leaching experiments. The combined body of evidence indicates that Dajiang sediments experienced recrystallization and neomorphism under rock-buffered conditions that preserved primary signals. In contrast, the Meishan records display influences from both primary and secondary processes, including local differences in fractionation, fluid-buffered early marine diagenesis, and late stage diagenetic overprinting. The three isotopic records for Dajiang, and to some extent, the delta Ca-44/40 and delta Sr-88/86 records for Meishan, preserve information about the geochemistry of end-Permian seawater. We find that enhanced weathering of shelf carbonates during sea level fall provides the best explanation for rapidly decreasing seawater delta Ca-44/40 and delta Sr-88/86 values without affecting Sr-87/Sr-86 ratios. (C) 2019 Elsevier Ltd. All rights reserved. Report Ocean acidification Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) Geochimica et Cosmochimica Acta 262 143 165 |
institution |
Open Polar |
collection |
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
topic |
Calcium isotopes Radiogenic Sr isotopes Stable Sr isotopes end-Permian Chemical weathering Diagenesis CALCIUM ISOTOPE FRACTIONATION STABLE SR-ISOTOPE MULTICOMPONENT CARBONATE SYSTEM EARLY MARINE DIAGENESIS PHOTIC-ZONE EUXINIA TRIASSIC BOUNDARY SOUTH CHINA OCEAN ACIDIFICATION NANPANJIANG BASIN TRACE-ELEMENT Geochemistry & Geophysics |
spellingShingle |
Calcium isotopes Radiogenic Sr isotopes Stable Sr isotopes end-Permian Chemical weathering Diagenesis CALCIUM ISOTOPE FRACTIONATION STABLE SR-ISOTOPE MULTICOMPONENT CARBONATE SYSTEM EARLY MARINE DIAGENESIS PHOTIC-ZONE EUXINIA TRIASSIC BOUNDARY SOUTH CHINA OCEAN ACIDIFICATION NANPANJIANG BASIN TRACE-ELEMENT Geochemistry & Geophysics Wang, Jiuyuan Jacobson, Andrew D. Zhang, Hua Ramezani, Jahandar Sageman, Bradley B. Hurtgen, Matthew T. Bowring, Samuel A. Shen, Shu-Zhong Coupled delta Ca-44/40, delta Sr-88/86, and Sr-87/Sr-86 geochemistry across the end-Permian mass extinction event |
topic_facet |
Calcium isotopes Radiogenic Sr isotopes Stable Sr isotopes end-Permian Chemical weathering Diagenesis CALCIUM ISOTOPE FRACTIONATION STABLE SR-ISOTOPE MULTICOMPONENT CARBONATE SYSTEM EARLY MARINE DIAGENESIS PHOTIC-ZONE EUXINIA TRIASSIC BOUNDARY SOUTH CHINA OCEAN ACIDIFICATION NANPANJIANG BASIN TRACE-ELEMENT Geochemistry & Geophysics |
description |
We report high-resolution, high-precision delta Ca-44/40, delta Sr-88/86, and Sr-87/Sr-86 records spanning the Permian-Triassic boundary (PTB) from the Meishan and Dajiang carbonate successions in south China. The goal of the study was to understand the behavior of Ca and Sr isotopes during a time period in Earth history characterized by severe biological and environmental perturbations, including a major mass extinction, flood basalt volcanism, ocean acidification, and sea level fluctuations. Dajiang displays negative delta Ca-44/40 and delta Sr-88/86 excursions and invariant Sr-87/Sr-86 ratios in the <60 kyr timeframe between the main extinction horizon and the PTB. The Meishan delta Ca-44/40 and delta Sr-88/86 records are generally shifted to higher values and display both synchronous and asynchronous trends relative to Dajiang. In addition, Sr-87/Sr-86 ratios at Meishan are significantly elevated and do not define a clear secular pattern. We reconcile diverse conceptual models for the dataset with the aid of supporting elemental and isotope measurements (e.g., Sr/Ca, delta C-13, and delta O-18), as well as sequential leaching experiments. The combined body of evidence indicates that Dajiang sediments experienced recrystallization and neomorphism under rock-buffered conditions that preserved primary signals. In contrast, the Meishan records display influences from both primary and secondary processes, including local differences in fractionation, fluid-buffered early marine diagenesis, and late stage diagenetic overprinting. The three isotopic records for Dajiang, and to some extent, the delta Ca-44/40 and delta Sr-88/86 records for Meishan, preserve information about the geochemistry of end-Permian seawater. We find that enhanced weathering of shelf carbonates during sea level fall provides the best explanation for rapidly decreasing seawater delta Ca-44/40 and delta Sr-88/86 values without affecting Sr-87/Sr-86 ratios. (C) 2019 Elsevier Ltd. All rights reserved. |
format |
Report |
author |
Wang, Jiuyuan Jacobson, Andrew D. Zhang, Hua Ramezani, Jahandar Sageman, Bradley B. Hurtgen, Matthew T. Bowring, Samuel A. Shen, Shu-Zhong |
author_facet |
Wang, Jiuyuan Jacobson, Andrew D. Zhang, Hua Ramezani, Jahandar Sageman, Bradley B. Hurtgen, Matthew T. Bowring, Samuel A. Shen, Shu-Zhong |
author_sort |
Wang, Jiuyuan |
title |
Coupled delta Ca-44/40, delta Sr-88/86, and Sr-87/Sr-86 geochemistry across the end-Permian mass extinction event |
title_short |
Coupled delta Ca-44/40, delta Sr-88/86, and Sr-87/Sr-86 geochemistry across the end-Permian mass extinction event |
title_full |
Coupled delta Ca-44/40, delta Sr-88/86, and Sr-87/Sr-86 geochemistry across the end-Permian mass extinction event |
title_fullStr |
Coupled delta Ca-44/40, delta Sr-88/86, and Sr-87/Sr-86 geochemistry across the end-Permian mass extinction event |
title_full_unstemmed |
Coupled delta Ca-44/40, delta Sr-88/86, and Sr-87/Sr-86 geochemistry across the end-Permian mass extinction event |
title_sort |
coupled delta ca-44/40, delta sr-88/86, and sr-87/sr-86 geochemistry across the end-permian mass extinction event |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2019 |
url |
http://ir.nigpas.ac.cn/handle/332004/27796 https://doi.org/10.1016/j.gca.2019.07.035 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
GEOCHIMICA ET COSMOCHIMICA ACTA http://ir.nigpas.ac.cn/handle/332004/27796 doi:10.1016/j.gca.2019.07.035 |
op_doi |
https://doi.org/10.1016/j.gca.2019.07.035 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
262 |
container_start_page |
143 |
op_container_end_page |
165 |
_version_ |
1766158259970899968 |