Global and regional controls on marine redox changes across the Ordovician-Silurian boundary in South China

doi:10.1016/j.palaeo.2016.10.006

	Global and regional controls on marine redox changes across the Ordovician-Silurian boundary in South China
	Liu, Yu 1,2,3; Li, Chao 3; Algeo, Thomas J.3,4,5; Fan, Junxuan6 ; Peng, Ping'an 1
	2016-12-01
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	463 页码:180-191
摘要	The Ordovician-Silurian (O-S) transition coincided with significant environmental and biological changes. In South China, the Yangtze Platform experienced both global and regional events at this time, including sea-level fluctuations, tectonic movements, volcanic eruptions, mass extinction, and widespread anoxia. The O-S transitional strata of the Yangtze Platform comprise organic-rich black shales that are an important oil source rock. To explore the evolution of watermass chemistry and its relationship to organic matter accumulation, we conducted an integrated Fe-S-C geochemical study (i.e., Fe-speciation, delta C-13(org),, delta S-34(py), pyrite-S and TOC) of the O-S boundary sections at Datianba (Chongqing Municipality) and Shuanghe (Sichuan Province). These sections were located in the restricted inner Yangtze Sea, in contrast to the previously studied Wangjiawan section, which was deposited in a more open setting of the outer Yangtze Sea. In contrast to the well-oxygenated conditions at Wangjiawan, the Datianba and Shuanghe sections record persistently anoxic, and episodically euxinic, conditions during the Hirnantian, which can be explained by the unique paleogeography and restricted hydrography of the inner Yangtze Sea. We propose that the regional Kwangsian Orogeny, which was driven by collision of the Yangtze and Cathaysia blocks, played a key role in basin development, watermass chemistry changes, and accumulation of Wufeng Formation black shales within the Yangtze Sea. The more widespread black shales of the Lower Silurian Lungmachi Formation were linked to the post-Hirnantian global marine transgression. (C) 2016 Elsevier B.V. All rights reserved.
关键词	Yangtze Platform Kwangsian Orogeny Hirnantian glaciation Fe speciation Black shale Anoxia
DOI	10.1016/j.palaeo.2016.10.006
语种	英语
关键词[WOS]	ORGANIC-CARBON PRESERVATION ; MASS EXTINCTION ; DEPOSITIONAL MODEL ; RICH SEDIMENTS ; BLACK SHALES ; HIRNANTIAN GLACIATION ; ENVIRONMENTAL-CHANGES ; KWANGSIAN OROGENY ; END-ORDOVICIAN ; YANGTZE BLOCK
资助项目	Chinese 973 Program[2013CB955704] ; NSFC[41172030] ; NSFC[41321002] ; U.S. National Science Foundation Sedimentary Geology and Paleobiology Program[EAR-1053449] ; NASA Exobiology Program[NNX13AJ1IG] ; China University of Geosciences, Wuhan (SKL-GPMR)[GPMR201301] ; China University of Geosciences, Wuhan (SKL-BGEG)[BGL201407]
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000387526000014
项目资助者	Chinese 973 Program ; NSFC ; U.S. National Science Foundation Sedimentary Geology and Paleobiology Program ; NASA Exobiology Program ; China University of Geosciences, Wuhan (SKL-GPMR) ; China University of Geosciences, Wuhan (SKL-BGEG)
出版者	ELSEVIER SCIENCE BV
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/12335
专题	中国科学院南京地质古生物研究所其他
通讯作者	Li, Chao
作者单位	1.Guangzhou Inst Geochem CAS, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China 4.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 5.Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA 6.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yu,Li, Chao,Algeo, Thomas J.,et al. Global and regional controls on marine redox changes across the Ordovician-Silurian boundary in South China[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2016,463:180-191.
APA	Liu, Yu,Li, Chao,Algeo, Thomas J.,Fan, Junxuan,&Peng, Ping'an.(2016).Global and regional controls on marine redox changes across the Ordovician-Silurian boundary in South China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,463,180-191.
MLA	Liu, Yu,et al."Global and regional controls on marine redox changes across the Ordovician-Silurian boundary in South China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 463(2016):180-191.