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

doi:10.1016/j.jseaes.2023.105687

	Volcanism-driven marine eutrophication in the end-Ordovician: Evidence from radiolarians and trace elements of black shale in South China
	Wu, Xuejin 1,2,3; Luo, Hui 1,2; Zhang, Junpeng 1,2; Chen, Qing 1,2; Fang, Xiang 1,2; Wang, Wenhui 4; Li, Wenjie 1,2; Shi, Zhensheng 5; Zhang, Yuandong 1,2
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2023-09-01
卷号	253 页码:12
关键词	Radiolarian Volcanism Primary productivity Redox conditions Mass extinction
ISSN号	1367-9120
DOI	10.1016/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.
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关键词	ORGANIC-CARBON ; YANGTZE REGION ; ASH ; BOUNDARY ; ENVIRONMENTS ; PHOSPHORUS ; SEDIMENTS ; DURATION ; PACIFIC ; SULFIDE
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
内容类型	期刊论文
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.