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  2. 地质与地球物理研究所
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  4. 中国科学院油气资源研究重点实验室
Climatic and oceanic controlled deposition of Late Ordovician-Early Silurian black shales on the North Yangtze platform, South China

文献类型：期刊论文

作者Yan Detian1; Chen Daizhao3; Wang Zhuozhuo2; Li Jing1; Yang Xiangrong1; Zhang Bao1
刊名MARINE AND PETROLEUM GEOLOGY
出版日期2019-12-01
卷号110页码:112-121
关键词Black shales Paleoclimate Paleoceanography Late ordovician Yangtze platform
ISSN号0264-8172
DOI10.1016/j.marpetgeo.2019.06.040
英文摘要Black shales deposited across the Late Ordovician and Early Silurian transition are considered to be the most important source rock and shale gas reservoirs in the Yangtze region of South China. However, the origin of these sediments remains contentious. In this study, we investigated the systematic changes in total organic carbon (TOC), organic carbon isotopes (delta C-13(org)), major elements and trace elements on the Ordovician-Silurian boundary strata from Qiaoting, North Yangtze Sea, to reconstruct the climatic conditions, redox changes, primary productivity, and other factors there, promoting the understanding for the formation mechanism of the organic-rich black shales. Element compositions and their ratios suggest that the black shales studied here were dominantly sourced by the felsic igneous rock, which is similar to granodiorite in composition. Paleoclimatic proxies (CIA, CIW, delta C-13(org)) suggest that the global climate system experienced significant changes from warm-humid to cold-dry and then to warm-humid climates during the Ordovician-Silurian transition. Paleoredox indices (S/C, U/Th, Ni/Co and V/(V + Ni) ratios) also demonstrate fluctuating redox variations from anoxic to oxygenated, and then to anoxic states during this interval in the Yangtze Sea, which describe an oxygenated Guanyinqiao strata sandwiched between the stagnant and anoxic Wufeng and Longmaxi black shales. Paleoproductivity parameters (TOC, Ba-bio, contents and P/Al ratio) suggest that the organic-rich Wufeng and Longmaxi black shales, were deposited with a high biological productivity, while the organic-lean Guanyinqiao sediments were deposited with a low biological productivity. These data demonstrate large climatic and oceanic fluctuations during the Ordovician-Silurian transition, providing essential controlling factors on the oceanic anoxia, primary productivity, and subsequent organic-rich black shale depositions in the Yangtze region during the Late Ordovician and Early Silurian intervals.
WOS关键词ORGANIC-MATTER ; APPALACHIAN BASIN ; CARBON ; PROVENANCE ; GEOCHEMISTRY ; ACCUMULATION ; SEDIMENTS ; ISOTOPE ; BARIUM ; PRODUCTIVITY
资助项目National Natural Foundation of China[41690131] ; National Natural Foundation of China[91755210] ; National Natural Foundation of China[41572327] ; National Major Fundamental Research Program of China[2018YFF0215400] ; Program of Introducing Talents of Discipline to Universities[B14031]
WOS研究方向Geology
语种英语
WOS记录号WOS:000498747500007
出版者ELSEVIER SCI LTD
资助机构National Natural Foundation of China ; National Natural Foundation of China ; National Major Fundamental Research Program of China ; National Major Fundamental Research Program of China ; Program of Introducing Talents of Discipline to Universities ; Program of Introducing Talents of Discipline to Universities ; National Natural Foundation of China ; National Natural Foundation of China ; National Major Fundamental Research Program of China ; National Major Fundamental Research Program of China ; Program of Introducing Talents of Discipline to Universities ; Program of Introducing Talents of Discipline to Universities ; National Natural Foundation of China ; National Natural Foundation of China ; National Major Fundamental Research Program of China ; National Major Fundamental Research Program of China ; Program of Introducing Talents of Discipline to Universities ; Program of Introducing Talents of Discipline to Universities ; National Natural Foundation of China ; National Natural Foundation of China ; National Major Fundamental Research Program of China ; National Major Fundamental Research Program of China ; Program of Introducing Talents of Discipline to Universities ; Program of Introducing Talents of Discipline to Universities
源URL[http://ir.iggcas.ac.cn/handle/132A11/95778]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Yan Detian
作者单位1.China Univ Geosci, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan 430074, Hubei, Peoples R China
2.Beijing Inst Geol & Prospecting Engn, Beijing 100048, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Yan Detian,Chen Daizhao,Wang Zhuozhuo,et al. Climatic and oceanic controlled deposition of Late Ordovician-Early Silurian black shales on the North Yangtze platform, South China[J]. MARINE AND PETROLEUM GEOLOGY,2019,110:112-121.
APA Yan Detian,Chen Daizhao,Wang Zhuozhuo,Li Jing,Yang Xiangrong,&Zhang Bao.(2019).Climatic and oceanic controlled deposition of Late Ordovician-Early Silurian black shales on the North Yangtze platform, South China.MARINE AND PETROLEUM GEOLOGY,110,112-121.
MLA Yan Detian,et al."Climatic and oceanic controlled deposition of Late Ordovician-Early Silurian black shales on the North Yangtze platform, South China".MARINE AND PETROLEUM GEOLOGY 110(2019):112-121.

入库方式： OAI收割

来源：地质与地球物理研究所

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