IGGCAS OpenIR  > 油气资源研究院重点实验室
Climatic and oceanic controlled deposition of Late Ordovician-Early Silurian black shales on the North Yangtze platform, South China
Yan Detian1; Chen Daizhao2; Wang Zhuozhuo3; Li Jing1; Yang Xiangrong1; Zhang Bao1
2019-12-01
Source PublicationMARINE AND PETROLEUM GEOLOGY
ISSN0264-8172
Volume110Pages:112-121
AbstractBlack 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.
KeywordBlack shales Paleoclimate Paleoceanography Late ordovician Yangtze platform
DOI10.1016/j.marpetgeo.2019.06.040
Funding OrganizationNational 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
WOS KeywordORGANIC-MATTER ; APPALACHIAN BASIN ; CARBON ; PROVENANCE ; GEOCHEMISTRY ; ACCUMULATION ; SEDIMENTS ; ISOTOPE ; BARIUM ; PRODUCTIVITY
Language英语
Funding ProjectNational 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]
Funding OrganizationNational 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
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000498747500007
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95778
Collection油气资源研究院重点实验室
Corresponding AuthorYan Detian
Affiliation1.China Univ Geosci, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan 430074, Hubei, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Geophys, Beijing 100029, Peoples R China
3.Beijing Inst Geol & Prospecting Engn, Beijing 100048, Peoples R China
Recommended Citation
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.
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