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What triggered the Late Ordovician mass extinction (LOME)? Perspectives from geobiology and biogeochemical modeling

文献类型：期刊论文

作者Zhang, Junpeng3,4,5,6; Lyons, Timothy W.3,4; Li, Chao2,5,6; Fang, Xiang5,6; Chen, Qing5,6; Botting, Joseph1,5,6; Zhang, Yuandong2,5,6; Chen, Qing（陈清）; Zhang, Yuandong（张元动）; Zhang, Junpeng（张俊鹏）
刊名GLOBAL AND PLANETARY CHANGE
出版日期2022-09-01
卷号216页码:15
ISSN号0921-8181
关键词Hirnantian oceanic anoxic event Deep -water anoxia Low -sulfate oceans Sulfur cycle Mass extinction
DOI10.1016/j.gloplacha.2022.103917
通讯作者Zhang, Junpeng(jpzhang@nigpas.ac.cn)
英文摘要Recent studies have described an oceanic anoxic event during the Hirnantian (HOAE) and linked this event to the Late Ordovician mass extinction (LOME). However, the extent and duration of the HOAE remain under debate, as do questions about how oceanic anoxia impacted marine ecosystems. For this study, we investigated two pre-viously unstudied sections adjacent to the open ocean in South China for iron speciation data and sulfur isotope signatures of pyrite and carbonate associated sulfate. Combined with published results, these data provide a view of both local and global oceanic redox landscapes during this interval. Previous work has challenged the idea that increased oxygen solubility under colder temperatures was the critical control of glacial marine oxygenation. Here we describe oxygenated Hirnantian shallow-water environments impacted by the effects of glacio-eustatic variation and deep-water anoxia induced by an enhanced biological pump. Decreased isotopic fractionation between seawater sulfate and sedimentary pyrite has the potential to reveal a period of low oceanic sulfate levels and helps to constrain the duration and style of oceanic redox evolution during the HOAE. Moreover, our modeling work suggests another possibility that the Hirnantian sulfur cycle shifted less than +3 parts per thousand within 1 Ma as a result of decreased silicate weathering, increased volcanism, and enhanced pyrite burial. Correlations with data for marine faunal diversity are somewhat inconsistent with previous assertions that oceanic anoxia triggered the LOME. Nonetheless, cool-water tolerant animals (especially within benthos) may have suffered from oxygen -deficient seawater and lethal metal levels within their limited ecospace much later in the middle of the Hir-nantian. Recovery or proliferation of some portions of the marine ecosystem coincided with oscillating redox conditions at the end of glaciation, including the deep-water Anji sponge-dominated benthic faunas. Our findings contribute new insights into the processes operating during the LOME and, more generally, the evolutionary interactions between OAEs and mass extinctions over Earth history.
WOS关键词CARBONATE-ASSOCIATED SULFATE ; SULFUR ISOTOPE EVIDENCE ; REDOX CONDITIONS ; SOUTH CHINA ; SEA-LEVEL ; SILURIAN TRANSITION ; SEAWATER CHEMISTRY ; SECULAR VARIATION ; YANGTZE REGION ; GLOBAL CLIMATE
资助项目National Natural Science Foundation in China[41802023] ; National Natural Science Foundation in China[42030510] ; Chinese Academy of Sciences[XDB26000000] ; Natural Science Foundation in Jiangsu Province[BK20171103] ; National Science and Technology Major Project[2017ZX05036-001- 004] ; China Scholarship Council ; NASA Astrobiology Institute[NNA15BB03A] ; NASA Interdisciplinary Consortia for Astrobiology Research
WOS研究方向Physical Geography ; Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:000844409300003
资助机构National Natural Science Foundation in China ; Chinese Academy of Sciences ; Natural Science Foundation in Jiangsu Province ; National Science and Technology Major Project ; China Scholarship Council ; NASA Astrobiology Institute ; NASA Interdisciplinary Consortia for Astrobiology Research
源URL[http://ir.nigpas.ac.cn/handle/332004/41157]  
专题中国科学院南京地质古生物研究所
通讯作者Zhang, Junpeng; Zhang, Junpeng（张俊鹏）
作者单位1.Amgueddfa Cymru Natl Museum Wales, Dept Nat Sci, Cathays Pk, Cardiff CF10 3LP, Wales
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Calif Riverside, Alternat Earths Astrobiol Team, Riverside, CA 92521 USA
4.Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 USA
5.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Jiangsu, Peoples R China
6.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Junpeng,Lyons, Timothy W.,Li, Chao,et al. What triggered the Late Ordovician mass extinction (LOME)? Perspectives from geobiology and biogeochemical modeling[J]. GLOBAL AND PLANETARY CHANGE,2022,216:15.
APA Zhang, Junpeng.,Lyons, Timothy W..,Li, Chao.,Fang, Xiang.,Chen, Qing.,...&Zhang, Junpeng.(2022).What triggered the Late Ordovician mass extinction (LOME)? Perspectives from geobiology and biogeochemical modeling.GLOBAL AND PLANETARY CHANGE,216,15.
MLA Zhang, Junpeng,et al."What triggered the Late Ordovician mass extinction (LOME)? Perspectives from geobiology and biogeochemical modeling".GLOBAL AND PLANETARY CHANGE 216(2022):15.

入库方式： OAI收割

来源：南京地质古生物研究所

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