Carbon isotopic shift and its cause at the Wuchiapingian-Changhsingian   boundary in the Upper Permian at the Zhaojiaba section, South China:   Evidences from multiple geochemical proxies

doi:10.1016/j.jseaes.2015.01.011

CORC > 北京大学 > 地球与空间科学学院

	Carbon isotopic shift and its cause at the Wuchiapingian-Changhsingian boundary in the Upper Permian at the Zhaojiaba section, South China: Evidences from multiple geochemical proxies
	Wei, Hengye ; Yu, Hao ; Wang, Jianguo ; Qiu, Zhen ; Xiang, Lei ; Shi, Guo
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2015
关键词	Wuchiapingian-Changhsingian boundary Biomarker Organic carbon isotope Primary productivity Redox Zhaojiaba section MARINE ORGANIC-MATTER WESTERN HUBEI PROVINCE TRIASSIC BOUNDARY MASS EXTINCTION SULFUR ISOTOPE BIOTIC CRISIS BLACK-SEA ENVIRONMENTAL-CHANGE HOLOCENE SEDIMENTS REDOX CONDITIONS
DOI	10.1016/j.jseaes.2015.01.011
英文摘要	The Late Permian environmental change, connecting the Guadalupian-Lopingian (G-L) (Middle-Upper Permian) boundary mass extinction and the Permain-Triassic (P-Tr) boundary mass extinction, has attracted more and more attentions. A significant negative shift for carbon isotope had been found at the Wuchiapingian-Changhsingian (W-C) boundary in the Upper Permian recently. However, the cause(s) of this negative excursion is still unknown. To resolve this problem, we analyzed the bulk organic carbon isotope, total organic carbon (TOC) content, pyritic sulfur (S-py) content, major element concentrations, and molecular organic biomarkers in the Wujiaping and Dalong formations in the Upper Permian from the Zhaojiaba section in western Hubei province, South China. Our results show that (1) there was a significant negative excursion in organic carbon isotopes at the W-C boundary and again a negative excursion at the top of Changhsingian stage; (2) the significant negative excursion at the W-C boundary was probably a global signal and mainly caused by the low primary productivity; and (3) the negative carbon isotope excursion at the top of Changhsingian was probably caused by the Siberian Traps eruptions. A decline in oceanic primary productivity at the W-C boundary probably represents a disturbance of the marine food web, leading to a vulnerable ecosystem prior to the P-Tr boundary mass extinction. (C) 2015 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China (NSFC) [41302021, 41203030, 41002007]; Scientific and Technologic Project of Jiangxi Education Department [GJJ13453]; SCI(E); ARTICLE; weihengye@163.com; 270-285; 105
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/419741]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wei, Hengye,Yu, Hao,Wang, Jianguo,et al. Carbon isotopic shift and its cause at the Wuchiapingian-Changhsingian boundary in the Upper Permian at the Zhaojiaba section, South China: Evidences from multiple geochemical proxies[J]. JOURNAL OF ASIAN EARTH SCIENCES,2015.
APA	Wei, Hengye,Yu, Hao,Wang, Jianguo,Qiu, Zhen,Xiang, Lei,&Shi, Guo.(2015).Carbon isotopic shift and its cause at the Wuchiapingian-Changhsingian boundary in the Upper Permian at the Zhaojiaba section, South China: Evidences from multiple geochemical proxies.JOURNAL OF ASIAN EARTH SCIENCES.
MLA	Wei, Hengye,et al."Carbon isotopic shift and its cause at the Wuchiapingian-Changhsingian boundary in the Upper Permian at the Zhaojiaba section, South China: Evidences from multiple geochemical proxies".JOURNAL OF ASIAN EARTH SCIENCES (2015).