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Osmium-isotope evidence for volcanism across the Wuchiapingian-Changhsingian boundary interval
Liu, Zeyang1; Selby, David1,6; Zhang, Hua (张华)2,3; Zheng, Quanfeng (郑全锋)2,3; Shen, Shuzhong (沈树忠)4; Sageman, Bradley B.5; Grasby, Stephen E.7,8; Beauchamp, Benoit8
2019-12-20
Source PublicationCHEMICAL GEOLOGY
ISSN0009-2541
Volume529Pages:7
Abstract

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.

KeywordWuchiapingian-Changhsingian boundary Osmium isotope Volcanism South China Canadian arctic Carbon isotopes
DOI10.1016/j.chemgeo.2019.119313
Language英语
WOS KeywordPERMIAN MASS EXTINCTION ; STRATOTYPE SECTION ; SVERDRUP BASIN ; POINT GSSP ; CARBON ; TIMESCALE ; CHEMOSTRATIGRAPHY ; STRATIGRAPHY ; EXCURSIONS ; SHANGSI
Funding ProjectStrategic Priority Research Program (B) of CAS[XDB26000000] ; Strategic Priority Research Program (B) of CAS[XDB18000000] ; TOTAL Endowment Fund ; CUG Wuhan Dida Scholarship
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000496914900013
Funding OrganizationStrategic Priority Research Program (B) of CAS ; TOTAL Endowment Fund ; CUG Wuhan Dida Scholarship
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/29098
Collection中国科学院南京地质古生物研究所
Corresponding AuthorLiu, Zeyang
Affiliation1.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironmen4, 39 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
4.Nanjing Univ, Sch Earth Sci & Engn, Nanjing 210023, Jiangsu, Peoples R China
5.Northwestern Univ, Dept Geol Sci, Evanston, IL 60208 USA
6.China Univ Geosci, Sch Earth Resources, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Hubei, Peoples R China
7.Calgary Nat Resources Canada, Geol Survey Canada, 3303 33Rd St Nw, Calgary, AB T2L 2A7, Canada
8.Univ Calgary, Dept Geosci, 2500 Univ Dr NW, Calgary, AB T2N 1N4, Canada
Recommended Citation
GB/T 7714
Liu, Zeyang,Selby, David,Zhang, Hua ,et al. Osmium-isotope evidence for volcanism across the Wuchiapingian-Changhsingian boundary interval[J]. CHEMICAL GEOLOGY,2019,529:7.
APA Liu, Zeyang.,Selby, David.,Zhang, Hua .,Zheng, Quanfeng .,Shen, Shuzhong .,...&Beauchamp, Benoit.(2019).Osmium-isotope evidence for volcanism across the Wuchiapingian-Changhsingian boundary interval.CHEMICAL GEOLOGY,529,7.
MLA Liu, Zeyang,et al."Osmium-isotope evidence for volcanism across the Wuchiapingian-Changhsingian boundary interval".CHEMICAL GEOLOGY 529(2019):7.
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