Osmium-isotope evidence for volcanism across the Wuchiapingian-Changhsingian boundary interval
Two negative carbon isotope excursions (3.5-6.5 parts per thousand) across the Wuchiapingian-Changhsingian boundary (WCB) are observed globally (sections in China, Canada, and Iran); however, the causative mechanism of these excursions is debated. Here, high-resolution osmium isotope (Os-187/Os-188...
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ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/29037 2023-05-15T15:12:44+02:00 Osmium-isotope evidence for volcanism across the Wuchiapingian-Changhsingian boundary interval Liu, Zeyang Selby, David Zhang, Hua Zheng, Quanfeng Shen, Shuzhong Sageman, Bradley B. Grasby, Stephen E. Beauchamp, Benoit 2019-12-20 http://ir.nigpas.ac.cn/handle/332004/29037 https://doi.org/10.1016/j.chemgeo.2019.119313 英语 eng ELSEVIER CHEMICAL GEOLOGY http://ir.nigpas.ac.cn/handle/332004/29037 doi:10.1016/j.chemgeo.2019.119313 Wuchiapingian-Changhsingian boundary Osmium isotope Volcanism South China Canadian arctic Carbon isotopes PERMIAN MASS EXTINCTION STRATOTYPE SECTION SVERDRUP BASIN POINT GSSP CARBON TIMESCALE CHEMOSTRATIGRAPHY STRATIGRAPHY EXCURSIONS SHANGSI Geochemistry & Geophysics 期刊论文 2019 ftchinacscnigpas https://doi.org/10.1016/j.chemgeo.2019.119313 2020-03-20T01:05:07Z Two negative carbon isotope excursions (3.5-6.5 parts per thousand) across the Wuchiapingian-Changhsingian boundary (WCB) are observed globally (sections in China, Canada, and Iran); however, the causative mechanism of these excursions is debated. Here, high-resolution osmium isotope (Os-187/Os-188 or Os-i) chemostratigraphy of four globally correlated WCB sections (3 in China-Meishan, Shangsi and Lianyuan and 1 in Canada - Buchanan Lake) show two separate Osi excursions to less radiogenic compositions that are coincident with the carbon isotope shifts for two of the South China sections (Lianyuan, Meishan). In contrast, only a single Os-i excursion to less radiogenic compositions, coinciding with the earliest Changhsingian carbon isotope shift, is observed for the Shangsi and Buchanan Lake sections. The Os-i shift is interpreted to reflect increased unradiogenic Os input from basaltic magmatism in South China, possibly related to the Emeishan large igneous province (LIP). However, Os-187/Os-188 data suggest that only the earliest Changhsingian volcanism had global impact on both the ocean and atmosphere. The lack of any evidence for a biotic event associated with the WCB therefore may have been due to the more regional rather than global impact of volcanism during the latest Wuchiapingian. In contrast, during the earliest Changhsingian, volcanism was sufficient to cause a more global signal in the ocean osmium record, but was inadequate, or too prolonged, to drive any significant environmental change. Volcanism, however, may have provided the isotopically light carbon that drove the negative carbon isotope excursions across the WCB. Report Arctic sverdrup basin Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) Arctic Canada Chemical Geology 529 119313 |
institution |
Open Polar |
collection |
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
topic |
Wuchiapingian-Changhsingian boundary Osmium isotope Volcanism South China Canadian arctic Carbon isotopes PERMIAN MASS EXTINCTION STRATOTYPE SECTION SVERDRUP BASIN POINT GSSP CARBON TIMESCALE CHEMOSTRATIGRAPHY STRATIGRAPHY EXCURSIONS SHANGSI Geochemistry & Geophysics |
spellingShingle |
Wuchiapingian-Changhsingian boundary Osmium isotope Volcanism South China Canadian arctic Carbon isotopes PERMIAN MASS EXTINCTION STRATOTYPE SECTION SVERDRUP BASIN POINT GSSP CARBON TIMESCALE CHEMOSTRATIGRAPHY STRATIGRAPHY EXCURSIONS SHANGSI Geochemistry & Geophysics Liu, Zeyang Selby, David Zhang, Hua Zheng, Quanfeng Shen, Shuzhong Sageman, Bradley B. Grasby, Stephen E. Beauchamp, Benoit Osmium-isotope evidence for volcanism across the Wuchiapingian-Changhsingian boundary interval |
topic_facet |
Wuchiapingian-Changhsingian boundary Osmium isotope Volcanism South China Canadian arctic Carbon isotopes PERMIAN MASS EXTINCTION STRATOTYPE SECTION SVERDRUP BASIN POINT GSSP CARBON TIMESCALE CHEMOSTRATIGRAPHY STRATIGRAPHY EXCURSIONS SHANGSI Geochemistry & Geophysics |
description |
Two negative carbon isotope excursions (3.5-6.5 parts per thousand) across the Wuchiapingian-Changhsingian boundary (WCB) are observed globally (sections in China, Canada, and Iran); however, the causative mechanism of these excursions is debated. Here, high-resolution osmium isotope (Os-187/Os-188 or Os-i) chemostratigraphy of four globally correlated WCB sections (3 in China-Meishan, Shangsi and Lianyuan and 1 in Canada - Buchanan Lake) show two separate Osi excursions to less radiogenic compositions that are coincident with the carbon isotope shifts for two of the South China sections (Lianyuan, Meishan). In contrast, only a single Os-i excursion to less radiogenic compositions, coinciding with the earliest Changhsingian carbon isotope shift, is observed for the Shangsi and Buchanan Lake sections. The Os-i shift is interpreted to reflect increased unradiogenic Os input from basaltic magmatism in South China, possibly related to the Emeishan large igneous province (LIP). However, Os-187/Os-188 data suggest that only the earliest Changhsingian volcanism had global impact on both the ocean and atmosphere. The lack of any evidence for a biotic event associated with the WCB therefore may have been due to the more regional rather than global impact of volcanism during the latest Wuchiapingian. In contrast, during the earliest Changhsingian, volcanism was sufficient to cause a more global signal in the ocean osmium record, but was inadequate, or too prolonged, to drive any significant environmental change. Volcanism, however, may have provided the isotopically light carbon that drove the negative carbon isotope excursions across the WCB. |
format |
Report |
author |
Liu, Zeyang Selby, David Zhang, Hua Zheng, Quanfeng Shen, Shuzhong Sageman, Bradley B. Grasby, Stephen E. Beauchamp, Benoit |
author_facet |
Liu, Zeyang Selby, David Zhang, Hua Zheng, Quanfeng Shen, Shuzhong Sageman, Bradley B. Grasby, Stephen E. Beauchamp, Benoit |
author_sort |
Liu, Zeyang |
title |
Osmium-isotope evidence for volcanism across the Wuchiapingian-Changhsingian boundary interval |
title_short |
Osmium-isotope evidence for volcanism across the Wuchiapingian-Changhsingian boundary interval |
title_full |
Osmium-isotope evidence for volcanism across the Wuchiapingian-Changhsingian boundary interval |
title_fullStr |
Osmium-isotope evidence for volcanism across the Wuchiapingian-Changhsingian boundary interval |
title_full_unstemmed |
Osmium-isotope evidence for volcanism across the Wuchiapingian-Changhsingian boundary interval |
title_sort |
osmium-isotope evidence for volcanism across the wuchiapingian-changhsingian boundary interval |
publisher |
ELSEVIER |
publishDate |
2019 |
url |
http://ir.nigpas.ac.cn/handle/332004/29037 https://doi.org/10.1016/j.chemgeo.2019.119313 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic sverdrup basin |
genre_facet |
Arctic sverdrup basin |
op_relation |
CHEMICAL GEOLOGY http://ir.nigpas.ac.cn/handle/332004/29037 doi:10.1016/j.chemgeo.2019.119313 |
op_doi |
https://doi.org/10.1016/j.chemgeo.2019.119313 |
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Chemical Geology |
container_volume |
529 |
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119313 |
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1766343384852594688 |