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  2. 地质与地球物理研究所
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  4. 岩石圈演化国家重点实验室
Revisiting paleoenvironmental changes on the Upper Yangtze Block during the Ordovician-Silurian transition: New insights from elemental geochemistry

文献类型：期刊论文

作者Qiu, Zhen3,4; Li, Yifan2; Xiong, Wei3,4; Fan, Tailiang2; Zhao, Qun3,4; Zhang, Qin3,4; Wang, Yuman3,4; Liu, Wen3,4; Liang, Feng3,4; Zhang, Jiaqiang5
刊名SEDIMENTARY GEOLOGY
出版日期2023-06-01
卷号450页码:16
ISSN号0037-0738
关键词Wufeng Formation Longmaxi Formation Trace element Major element Black shale
DOI10.1016/j.sedgeo.2023.106377
英文摘要Temporal and spatial patterns of paleoenvironmental change on the Upper Yangtze Block during the Ordovician-Silurian transition remain debatable and somewhat self-contradictory. The present study is a reassessment of how regional and global events may have influenced the paleoenvironmental evolution of the Upper Yangtze Block. Abundances of redox-sensitive trace elements, including Mo and U, suggest a general ascending strati-graphic pattern from the oxic to anoxic (euxinic) conditions during Late Katian time. High-resolution fluctuations of redox conditions may reflect frequent eustatic sea-level changes. The Kuanyinchiao Bed accumulated under less reducing conditions during the climax of Hirnantian glaciation. Post-glacial transgression during the latest Hirnantian to Early Rhuddanian was accompanied by the re-establishment of euxinic bottom-water conditions. Authigenic Mo\\U covariation and Mo/TOC values of the studied stratigraphic successions suggest that the Upper Yangtze Shelf Sea was weakly to moderately restricted. Patterns of Cd/Mo and Co (ppm) x Mn (wt%) values sug-gest that the study area of the basin did not experience persistent upwelling. Instead, only seasonal upwelling oc-curred on the outer shelf, which is somewhat analogous with the modern Cariaco Basin. Terrestrial inputs, as reflected by Si/Al values, correspond with periods of diminished sedimentation rates and the establishment of anoxic conditions. Uplift associated with the Kwangsian Orogeny during latest Hirnantian to the early Rhuddanian time caused an increase in sedimentation rates in the eastern region of the study area. Strong covari-ance of Baxs and Eu/Eu* suggests that paleoproductivity was enhanced by regional hydrothermal events. Our results suggest that redox conditions and clastic inputs during deposition of the Ordovician-Silurian transition succession of the Upper Yangtze shelf were linked to climatically-induced sea-level fluctuations whereas the spatial gradient of redox conditions and clastic inputs from inner shelf to outer shelf was strongly controlled by paleogeography and orogenic movements.(c) 2023 Elsevier B.V. All rights reserved.
WOS关键词ORGANIC-MATTER ACCUMULATION ; BLACK SHALE DEPOSITION ; RARE-EARTH-ELEMENTS ; SOUTH CHINA ; MARINE-SEDIMENTS ; OCEAN PRODUCTIVITY ; LATEST ORDOVICIAN ; ENVIRONMENTAL-CHANGES ; EQUATORIAL ATLANTIC ; MULTIPLE CONTROLS
资助项目National Natural Science Founda-tion of China[U19B6003-01-02] ; National Natural Science Founda-tion of China[42272173] ; National Natural Science Founda-tion of China[42222209] ; National Natural Science Founda-tion of China[41802155] ; Scientific Research and Technological Development Programs of PetroChina[2021yjcq02] ; Scientific Research and Technological Development Programs of PetroChina[YJXK2019-16] ; Fundamental Research Funds for the Central Universities[2-9-2019-265]
WOS研究方向Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:000985266000001
资助机构National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; Scientific Research and Technological Development Programs of PetroChina ; Scientific Research and Technological Development Programs of PetroChina ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; Scientific Research and Technological Development Programs of PetroChina ; Scientific Research and Technological Development Programs of PetroChina ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; Scientific Research and Technological Development Programs of PetroChina ; Scientific Research and Technological Development Programs of PetroChina ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Founda-tion of China ; National Natural Science Founda-tion of China ; Scientific Research and Technological Development Programs of PetroChina ; Scientific Research and Technological Development Programs of PetroChina ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities
源URL[http://ir.iggcas.ac.cn/handle/132A11/110898]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Li, Yifan
作者单位1.SUNY Coll Fredonia, Dept Geol & Environm Sci, Fredonia, NY 14063 USA
2.China Univ Geosci Beijing, Sch Energy Resources, Beijing 100083, Peoples R China
3.Natl Energy Shale Gas Res & Dev Expt Ctr, Beijing 100083, Peoples R China
4.China Natl Petr Corp, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Qiu, Zhen,Li, Yifan,Xiong, Wei,et al. Revisiting paleoenvironmental changes on the Upper Yangtze Block during the Ordovician-Silurian transition: New insights from elemental geochemistry[J]. SEDIMENTARY GEOLOGY,2023,450:16.
APA Qiu, Zhen.,Li, Yifan.,Xiong, Wei.,Fan, Tailiang.,Zhao, Qun.,...&Lash, Gary.(2023).Revisiting paleoenvironmental changes on the Upper Yangtze Block during the Ordovician-Silurian transition: New insights from elemental geochemistry.SEDIMENTARY GEOLOGY,450,16.
MLA Qiu, Zhen,et al."Revisiting paleoenvironmental changes on the Upper Yangtze Block during the Ordovician-Silurian transition: New insights from elemental geochemistry".SEDIMENTARY GEOLOGY 450(2023):16.

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来源：地质与地球物理研究所

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