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Depositional controls on mineral assemblage and organic matter accumulation of upper Ordovician-lower Silurian mudstones in northwestern Guizhou area, China
Wang, Yingzhu1,2,3,4; Liang, Xing5; Zhang, Jiehui5; Chen, Zhuoheng4; Yang, Jijin1,2,3
2020-11-01
Source PublicationINTERNATIONAL JOURNAL OF COAL GEOLOGY
ISSN0166-5162
Volume231Pages:18
AbstractThe control of depositional conditions on sedimentary records spanning the Ordovician Wufeng-Silurian Longmaxi successions on the Yangtze Platform is not fully understood due to a lack of high-resolution faices analysis. This study aims to build a regional depositional model of this stratigraphic interval, to reveal the fundamental controls on the mineral assemblage and organic matter (OM) accumulation. Vertical lithofacies variability of two continuous cores in northwestern Guizhou area, south China, was analyzed at high resolution by RoqSCAN (an automated mineralogy tool) and field emission scanning electron microscope (FE-SEM) imaging. Based on multiscale sedimentary structure, mineral composition, total organic carbon (TOC) content, and geochemical characteristics, seven lithofacies were identified and interpreted as four facies associations (FA A-D) to characterize the spatio-temporal variation in these sedimentary environments. The deep-siliceous shelf FA-A is the richest in TOC content and biogenetic quartz, attributed to the strong anaerobic watermass, minimal terrestrial-flux, and enhanced organic-productivity during two global transgressions. The middle mixed shelf FA-B has moderate TOC and mixed minerals resulting from reworking processes during a fall of sea level caused by regional uplifts. Although the primary organic-productivity was promoted by increased volcanic ash fall, dilution due to increased terrestrial inputs made OM difficult to accumulate. The shallow muddy shelf FA-C and the shallow silty shelf FA-D were not favorable for OM accumulations because of the low organic productivity, strong oxygenated watermass, and high detrital dilution, through long-term sea level drops. The facies attributes of the target mudstones were remarkably influenced by regional tectonic-eustasy, in addition to global glacioeustasy.
KeywordYangtze Platform Shale gas reservoir Wufeng-Longmaxi mudstones Depositional condition Mineral Organic matter
DOI10.1016/j.coal.2020.103611
Funding OrganizationNational Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordMISSISSIPPIAN BARNETT SHALE ; GRAINED SEDIMENTARY-ROCKS ; FORT-WORTH BASIN ; LONGMAXI FORMATION ; SICHUAN BASIN ; MARINE SHALE ; EVAL DATA ; MECHANISMS ; PRESERVATION ; LITHOFACIES
Language英语
Funding ProjectNational Science and Technology Major Project[2016ZX05034-003] ; National Science and Technology Major Project[2017ZX05035-002] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB10050100] ; National Natural Science Foundation of China[U1562215]
Funding OrganizationNational Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaEnergy & Fuels ; Geology
WOS SubjectEnergy & Fuels ; Geosciences, Multidisciplinary
WOS IDWOS:000591617900001
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/98735
Collection页岩气与地质工程院重点实验室
Corresponding AuthorYang, Jijin
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.Geol Survey Canada, Nat Resources Canada, Lands & Minerals Sect, Calgary, AB T2L 2A7, Canada
5.PetroChina Zhejiang Oilfield Co, Hangzhou 311100, Peoples R China
First Author AffilicationKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang, Yingzhu,Liang, Xing,Zhang, Jiehui,et al. Depositional controls on mineral assemblage and organic matter accumulation of upper Ordovician-lower Silurian mudstones in northwestern Guizhou area, China[J]. INTERNATIONAL JOURNAL OF COAL GEOLOGY,2020,231:18.
APA Wang, Yingzhu,Liang, Xing,Zhang, Jiehui,Chen, Zhuoheng,&Yang, Jijin.(2020).Depositional controls on mineral assemblage and organic matter accumulation of upper Ordovician-lower Silurian mudstones in northwestern Guizhou area, China.INTERNATIONAL JOURNAL OF COAL GEOLOGY,231,18.
MLA Wang, Yingzhu,et al."Depositional controls on mineral assemblage and organic matter accumulation of upper Ordovician-lower Silurian mudstones in northwestern Guizhou area, China".INTERNATIONAL JOURNAL OF COAL GEOLOGY 231(2020):18.
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