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  4. 中国科学院新生代地质与环境重点实验室
Oceanic anoxia and extinction in the latest Ordovician

文献类型：期刊论文

作者Liu, Mu1,6; Chen, Daizhao1,5,6; Jiang, Lei1,6; Stockey, Richard G.4; Aseal, Dan3; Zhang, Bao2; Liu, Kang1,6; Yang, Xiangrong2; Yan, Detian2; Planavsky, Noah J.3
刊名EARTH AND PLANETARY SCIENCE LETTERS
出版日期2022-06-15
卷号588页码:12
ISSN号0012-821X
关键词Late Ordovician uranium isotope extinction carbonate South China anoxia
DOI10.1016/j.epsl.2022.117553
英文摘要The Late Ordovician (Hirnantian) mass extinction (LOME) was marked by two discrete pulses of high species turnover rates attributed to glacial cooling (LOME-1) and subsequent expansion of anoxic marine conditions (LOME-2). However, the mechanisms and extent of global marine anoxia remain controversial. In this study, we present uranium isotope (delta 238U) data from a new Ordovician-Silurian (O-S) boundary carbonate section in the Southwest China to explore the extent/duration of the global marine anoxia, and links to the LOME. This section was found to continuously record the characteristic Hirnantian paired carbon isotope excursion (HICE) and complete benthic faunal turnover across the O-S boundary based on detailed stratigraphic constraint. The poor correlations between delta 238Ucarb data, local redox proxy (Ce anomalies), and diagenetic indicators (e.g., Mn and Sr contents, Mn/Sr ratio, delta 18O), as well as microscopic petrographic examinations of O-S carbonates suggest that most of the delta 238U data are not produced by either local redox conditions or post-depositional diagenetic processes. By coupling our new uranium isotope data with a stochastic U isotope mass balance model, we suggest there were two episodes of widespread marine anoxia over this time interval revealed by systematic changes of delta 238U with two negative shifts punctuated by one positive one in between. The former took place in the late Katian, predating the LOME-1 episode and the pronounced climatic cooling; while the latter occurred synchronously with the LOME-2 in the mid-late Hirnantian, separated by a potential oceanic oxygenation event. This presents a more complicated picture of anoxia-as inferred from U isotope records-as a driver of the end-Ordovician mass extinction. The insignificant biotic response to late Katian anoxia is consistent with the idea that the effects of anoxia on marine ecosystem can be highly variable. On the other hand, the presence of anoxia in mid-late Hirnantian strengthen the connection between the oceanic deoxygenation and fauna turnover in LOME-2.(C) 2022 Elsevier B.V. All rights reserved.
WOS关键词SOUTH CHINA ; MASS EXTINCTION ; YANGTZE REGION ; STRATIGRAPHY ; CYCLOSTRATIGRAPHY ; OXYGENATION ; INSIGHTS ; RECORD ; SHALES
资助项目National Natural Science Foundation of China[91755210] ; National Natural Science Foundation of China[42102123] ; National Key R&D Program of China[2017YFC0603103] ; SRA Program from the Chinese Academy of Sciences
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER
WOS记录号WOS:000806755100001
资助机构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 Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; SRA Program from the Chinese Academy of Sciences ; SRA Program from the Chinese Academy of Sciences ; SRA Program from the Chinese Academy of Sciences ; SRA Program from 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 Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; SRA Program from the Chinese Academy of Sciences ; SRA Program from the Chinese Academy of Sciences ; SRA Program from the Chinese Academy of Sciences ; SRA Program from 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 Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; SRA Program from the Chinese Academy of Sciences ; SRA Program from the Chinese Academy of Sciences ; SRA Program from the Chinese Academy of Sciences ; SRA Program from 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 Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; SRA Program from the Chinese Academy of Sciences ; SRA Program from the Chinese Academy of Sciences ; SRA Program from the Chinese Academy of Sciences ; SRA Program from the Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/106056]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Chen, Daizhao
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
2.China Univ Geosci, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan 430074, Peoples R China
3.Yale Univ, Dept Geol & Geophys, New Haven, CT 06511 USA
4.Stanford Univ, Dept Geol Sci, Stanford, CA 94305 USA
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Mu,Chen, Daizhao,Jiang, Lei,et al. Oceanic anoxia and extinction in the latest Ordovician[J]. EARTH AND PLANETARY SCIENCE LETTERS,2022,588:12.
APA Liu, Mu.,Chen, Daizhao.,Jiang, Lei.,Stockey, Richard G..,Aseal, Dan.,...&Planavsky, Noah J..(2022).Oceanic anoxia and extinction in the latest Ordovician.EARTH AND PLANETARY SCIENCE LETTERS,588,12.
MLA Liu, Mu,et al."Oceanic anoxia and extinction in the latest Ordovician".EARTH AND PLANETARY SCIENCE LETTERS 588(2022):12.

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来源：地质与地球物理研究所

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