NIGPAS OpenIR
Progressive expansion of seafloor anoxia in the Middle to Late Ordovician Yangtze Sea: Implications for concurrent decline of invertebrate diversity
Zhang, Junpeng(张俊鹏)1,2,3,4; Li, Chao(李超)1,2,5; Fang, Xiang(方翔)1,2; Li, Wenjie(李文杰)1,2; Deng, Yiying(邓艺颖)1,2,5; Tu, Chenyi3,4; Algeo, Thomas J.6,7,8; Lyons, Timothy W.3,4; Zhang, Yuandong(张元动)1,2,5
2022-11-15
发表期刊EARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
卷号598页码:10
摘要

The Great Ordovician Biodiversification Event (GOBE) achieved its peak during the Middle Ordovician, likely in association with climatic cooling and a rise of atmospheric O2. However, unstable redox states developed widely in contemporaneous epeiric seas, challenging previous assumptions about sustained oceanic oxygenation driven by deep-ocean ventilation in the aftermath of Ordovician cooling. Here, we investigate two Middle-Upper Ordovician shale-dominated successions from intra-shelf basin and slope settings of the Yangtze Sea, South China. Negative shifts in bulk delta 15N and productivity proxies reveal temporal changes in the pattern of nutrient cycling under moderate-to-high productivity conditions, which were likely sustained by increased upwelling of cold and nutrient-rich deep waters in sync with contemporaneous climatic cooling. As a result, marine anoxia likely expanded in deep waters of the Yangtze Sea, as reflected in enrichments of highly reactive iron and redox-sensitive metals (Mo, U). Although moderate Mo abundances (25-50 ppm) and delta 98/95Mo values (+0.4 to +0.8%o) within the euxinic interval suggest that bottom waters had low sulfide concentrations, the delta 98/95Mo values are comparable with those of coeval euxinic facies (- +0.6%o). Furthermore, our modeling results show that low delta 98/95Mo can be produced when sulfidic sinks dominate Mo removal, suggesting that Middle-Late Ordovician oceans may have been less oxygenated than previously assumed, at least for the continental seas of South China, Baltica and Laurentia. These environmental changes may provide a new explanation for the -50% decline of invertebrate species following the peak of GOBE. Our findings thus link the progressive expansion of marine anoxia and climatic cooling to a profound biotic change during the Mid -Late Ordovician Period.(c) 2022 Elsevier B.V. All rights reserved.

关键词nitrogen isotopes Mo isotopes ocean redox climatic cooling GOBE biodiversity
DOI10.1016/j.epsl.2022.117858
收录类别SCI
语种英语
关键词[WOS]BIODIVERSIFICATION EVENT GOBE ; SULFUR ; CARBON ; SEDIMENTS ; OXYGENATION ; TRANSITION ; EASTERN ; PLANTS ; FJORD ; BASIN
资助项目National Natural Science Foundation of China (NSFC)[42030510] ; National Natural Science Foundation of China (NSFC)[41802023] ; Chinese Academy of Sciences[XDB26000000] ; Natural Science Foundation of Jiangsu Province[BK20171103] ; National Science and Technology Major Project[2017ZX05036-001-004] ; China Scholarship Council[201804910207] ; NASA Astrobiology Institute through the Science Mission Directorate[NNA15BB03A] ; NASA Astrobiology Institute through the NASA Interdisciplinary Consortia for Astrobiology Research[NNA15BB03A]
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000882965200003
项目资助者National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences ; Natural Science Foundation of Jiangsu Province ; National Science and Technology Major Project ; China Scholarship Council ; NASA Astrobiology Institute through the Science Mission Directorate ; NASA Astrobiology Institute through the NASA Interdisciplinary Consortia for Astrobiology Research
出版者ELSEVIER
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/41466
专题中国科学院南京地质古生物研究所
通讯作者Zhang, Junpeng(张俊鹏)
作者单位1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironment, Nanjing 210008, Jiangsu, Peoples R China
3.Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 USA
4.Univ Calif Riverside, Alternat Earths Astrobiol Ctr, Riverside, CA 92521 USA
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Hubei, Peoples R China
7.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China
8.Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA
第一作者单位中国科学院南京地质古生物研究所
通讯作者单位中国科学院南京地质古生物研究所
推荐引用方式
GB/T 7714
Zhang, Junpeng,Li, Chao,Fang, Xiang,et al. Progressive expansion of seafloor anoxia in the Middle to Late Ordovician Yangtze Sea: Implications for concurrent decline of invertebrate diversity[J]. EARTH AND PLANETARY SCIENCE LETTERS,2022,598:10.
APA Zhang, Junpeng.,Li, Chao.,Fang, Xiang.,Li, Wenjie.,Deng, Yiying.,...&Zhang, Yuandong.(2022).Progressive expansion of seafloor anoxia in the Middle to Late Ordovician Yangtze Sea: Implications for concurrent decline of invertebrate diversity.EARTH AND PLANETARY SCIENCE LETTERS,598,10.
MLA Zhang, Junpeng,et al."Progressive expansion of seafloor anoxia in the Middle to Late Ordovician Yangtze Sea: Implications for concurrent decline of invertebrate diversity".EARTH AND PLANETARY SCIENCE LETTERS 598(2022):10.
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