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Volcanism-driven marine eutrophication in the end-Ordovician: Evidence from radiolarians and trace elements of black shale in South China

文献类型：期刊论文

作者Wu, Xuejin1,2,3; Luo, Hui1,2; Zhang, Junpeng1,2; Chen, Qing1,2; Fang, Xiang1,2; Wang, Wenhui4; Li, Wenjie1,2; Shi, Zhensheng5; Zhang, Yuandong1,2
刊名JOURNAL OF ASIAN EARTH SCIENCES
出版日期2023-09-01
卷号253页码:12
ISSN号1367-9120
关键词Radiolarian Volcanism Primary productivity Redox conditions Mass extinction
DOI10.1016/j.jseaes.2023.105687
通讯作者Zhang, Junpeng(jpzhang@nigpas.ac.cn) ; Zhang, Yuandong(jpzhang@nigpas.ac.cn)
英文摘要A variety of recent work has addressed the key factors in the establishment of widespread seafloor anoxia at the time of the Late Ordovician Mass Extinction (LOME), but the trigger for marine eutrophication remains under debate. Herein we investigated two shale-dominated successions across the Ordovician-Silurian boundary in South China and identified three intervals characterized by abundant radiolarians and frequent volcanic ash beds, as well as elevated values of P/Al and Baexcess, through the late Katian to late Rhuddanian. These results suggest a strong positive correlation between intensive volcanism and increased primary productivity in the surface ocean. Moreover, high enrichment of redox-sensitive trace elements like Mo and U, together with smaller and more consistent size of pyrite framboids, suggest dominantly anoxic conditions in bottom waters of the endOrdovician Yangtze Sea. Thus, these lines of evidence point towards a hypothesis of volcanism-driven marine eutrophication, in which increased nutrient levels sourced from volcanism were transported into the oceans and thereby stimulated oceanic primary productivity. This in turn caused expansion of seafloor anoxia, and extinction of marine animals that survived the global temperature fall and marine regression resulting from the endOrdovician glaciation.
WOS关键词ORGANIC-CARBON ; YANGTZE REGION ; ASH ; BOUNDARY ; ENVIRONMENTS ; PHOSPHORUS ; SEDIMENTS ; DURATION ; PACIFIC ; SULFIDE
资助项目National Natural Science Foundation of China[42030510] ; National Natural Science Foundation of China[41802023] ; National Natural Science Foundation of China[41972162] ; Chinese Academy of Sciences[XDB26000000] ; Ministry of Science and Technology of China[2021DJ901] ; China Scholarship Council
WOS研究方向Geology
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:001000691400001
资助机构National Natural Science Foundation of China ; Chinese Academy of Sciences ; Ministry of Science and Technology of China ; China Scholarship Council
源URL[http://ir.nigpas.ac.cn/handle/332004/42138]  
专题中国科学院南京地质古生物研究所
通讯作者Zhang, Junpeng; Zhang, Yuandong
作者单位1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironment, Nanjing 210008, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Cent South Univ, Sch Geosci & Info Phys, Key Lab Metallogen Predict Nonferrous Met & Geol E, Minist Educ, Changsha 410083, Peoples R China
5.PetroChina Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Xuejin,Luo, Hui,Zhang, Junpeng,et al. Volcanism-driven marine eutrophication in the end-Ordovician: Evidence from radiolarians and trace elements of black shale in South China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2023,253:12.
APA Wu, Xuejin.,Luo, Hui.,Zhang, Junpeng.,Chen, Qing.,Fang, Xiang.,...&Zhang, Yuandong.(2023).Volcanism-driven marine eutrophication in the end-Ordovician: Evidence from radiolarians and trace elements of black shale in South China.JOURNAL OF ASIAN EARTH SCIENCES,253,12.
MLA Wu, Xuejin,et al."Volcanism-driven marine eutrophication in the end-Ordovician: Evidence from radiolarians and trace elements of black shale in South China".JOURNAL OF ASIAN EARTH SCIENCES 253(2023):12.

入库方式： OAI收割

来源：南京地质古生物研究所

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