Geochemistry of upper Permian siliceous rocks from the Lower Yangtze region, southeastern China: implications for the origin of chert and Permian ocean chemistry

doi:10.1007/s12182-018-0293-3

	Geochemistry of upper Permian siliceous rocks from the Lower Yangtze region, southeastern China: implications for the origin of chert and Permian ocean chemistry
	Liao, Zhi-Wei 1,2,3,4; Hu, Wen-Xuan 5; Fu, Xiu-Gen 3; Hu, Zhong-Ya 5
刊名	PETROLEUM SCIENCE
	2019-04-01
卷号	16 期号:2 页码:252-266
关键词	Lower Yangtze region Da-long Formation Siliceous rock Biological chert Volcanism
ISSN号	1672-5107
DOI	10.1007/s12182-018-0293-3
英文摘要	The Permian Chert Event is of great significance to understanding the geological evolution of the entire Permian; however, the origin of widespread chert formation is debated. We report new geochemical data from deep-marine siliceous rocks of the upper Permian Da-long Formation, Lower Yangtze region, southeastern China. Their geochemical results show that these thin-bedded siliceous rocks have a clear biologic origin, with rare to no evidence of hydrothermal influence. The values of Al/(Al+Fe+Mn) and Eu/Eu* are 0.60-0.84 (mean=0.72) and 0.45-1.08 (mean=0.77), respectively, and Mn/Ti ratios are relatively low (mean=0.72). The correlations of La-N/Ce-N, La-N/Yb-N, and Fe2O3/TiO2 with Al2O3/(Al2O3+Fe2O3), along with the Ce anomaly, indicate that the Da-long siliceous rocks were deposited at a transitional zone between a continental margin and the open ocean; i.e., relatively close to terrestrial sediment input and far from hydrothermal activity. The accumulation of chert is related to its unique paleogeographic location in an equatorial setting with many submarine paleo-highlands. Intense upwelling and frequent local volcanism are the main factors that promoted the development of siliceous rocks in the studied area. Ocean acidification triggered by large-scale volcanism (Large Igneous Province) during the late Permian led to extensive silica precipitation and preservation.
资助项目	National Natural Science Foundation of China[41702129] ; Chongqing Research Program of Basic Research and Frontier Technology[cstc2017jcyjAX0448] ; Open Fund of Key Laboratory of Sedimentary Basin and Oil and Gas Resources, Ministry of Land and Resources (Chengdu Center, CGS)[CDCGS2018003] ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)[173115] ; Science and Technology Research Program of Chongqing Municipal Education Commission[KJQN201800115] ; Fundamental Research Funds for the Central Universities[106112017CDJXY240001]
WOS关键词	EARTH-ELEMENT GEOCHEMISTRY ; TRIASSIC BOUNDARY ; SOUTH CHINA ; DALONG FORMATION ; RARE-EARTH ; DEPOSITIONAL-ENVIRONMENTS ; SICHUAN BASIN ; ACIDIFICATION ; EXTINCTION ; EVOLUTION
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	SPRINGEROPEN
WOS记录号	WOS:000463605100002
资助机构	National Natural Science Foundation of China ; Chongqing Research Program of Basic Research and Frontier Technology ; Open Fund of Key Laboratory of Sedimentary Basin and Oil and Gas Resources, Ministry of Land and Resources (Chengdu Center, CGS) ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS) ; Science and Technology Research Program of Chongqing Municipal Education Commission ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/15761]
专题	中国科学院南京地质古生物研究所
通讯作者	Liao, Zhi-Wei; Hu, Wen-Xuan
作者单位	1.Chongqing Univ, Coll Resources & Environm Sci, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China 2.Shandong Univ Sci & Technol, Shandong Prov Key Lab Deposit Mineralizat & Sedim, Qingdao 266590, Shandong, Peoples R China 3.Minist Land & Resources, Key Lab Sedimentary Basin & Oil & Gas Resources, Chengdu 610081, Sichuan, Peoples R China 4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China 5.Nanjing Univ, Inst Energy Sci, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Liao, Zhi-Wei,Hu, Wen-Xuan,Fu, Xiu-Gen,et al. Geochemistry of upper Permian siliceous rocks from the Lower Yangtze region, southeastern China: implications for the origin of chert and Permian ocean chemistry[J]. PETROLEUM SCIENCE,2019,16(2):252-266.
APA	Liao, Zhi-Wei,Hu, Wen-Xuan,Fu, Xiu-Gen,&Hu, Zhong-Ya.(2019).Geochemistry of upper Permian siliceous rocks from the Lower Yangtze region, southeastern China: implications for the origin of chert and Permian ocean chemistry.PETROLEUM SCIENCE,16(2),252-266.
MLA	Liao, Zhi-Wei,et al."Geochemistry of upper Permian siliceous rocks from the Lower Yangtze region, southeastern China: implications for the origin of chert and Permian ocean chemistry".PETROLEUM SCIENCE 16.2(2019):252-266.