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A reassessment on the timing and potential drivers of the major seawater Sr-87/Sr-86 drop in the Ordovician Period: New evidence from conodonts in China

文献类型：期刊论文

作者Liu, Kang1,2,5; Jiang, Maosheng1,5; Huang, Taiyu3; Zhang, Liyu4; Wang, Yuanzheng1,2,5; Chen, Daizhao1,2,5
刊名CHEMICAL GEOLOGY
出版日期2022-08-20
卷号604页码:13
ISSN号0009-2541
关键词Ordovician Sr-isotopes Conodonts Mid-oceanic ridge spreading Mass-balance model
DOI10.1016/j.chemgeo.2022.120906
英文摘要The major drop in marine Sr-87/Sr-86 records across the Middle-Late Ordovician boundary (Darriwilian-Sandbian) was one of the most dramatic perturbations of the global Sr cycle in Phanerozoic. However, the precise timing of this isotopic event has not been well constrained, partially making it difficult to further clarify the possible drivers of this isotopic event. For this study, we present multi-continental conodont apatite-based Sr-isotope datasets from three well-studied Ordovician carbonate successions in China, i.e., the Huanghuachang section in South China, the Kalpin Shuinichang-Dawangou and the Nanyigou sections in Tarim Basin, northwestern China. Our new Sr-87/Sr-86 records generally accord with global seawater Sr-87/Sr-86 secular variation curve and are supposed to be a reflection of coeval primary seawater signatures. Constrained with detailed conodont biostratigraphic and high-resolution 6 13 C chemostratigraphic framework, the onset of the sharp decline in Sr-87/Sr-86 ratios was placed within the Histiodella holodentata zone-Eoplacognathus suecicus zone, and approximately synchronous with the initiation of the Middle Darriwilian Carbon Isotope Excursion (MDICE). Numerical modeling reveals that this major Sr-87/Sr-86 drop could have been generated by a sustainable increase of oceanic hydrothermal (mantle-derived) Sr flux and/or a progressive decrease of continental-derived Sr flux. Multi-proxy analyses further demonstrate that the impact of enhanced oceanic hydrothermal activities accompanying with the accelerating opening of the Rheic and Paleo-Tethys oceans, may have played a central role in driving the major Sr-87/Sr-86 drop during the Middle-Late Ordovician transition.
WOS关键词CARBON-ISOTOPE STRATIGRAPHY ; YANGTZE REGION ; SOUTH CHINA ; TARIM BASIN ; MIDDLE ; SR ; RECORDS ; BIODIVERSIFICATION ; CHEMOSTRATIGRAPHY ; GEOCHEMISTRY
资助项目National Natural Science Founda-tion of China (NSFC)[41573010] ; National Natural Science Founda-tion of China (NSFC)[41272134] ; National Natural Science Founda-tion of China (NSFC)[91755210]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER
WOS记录号WOS:000810937900001
资助机构National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC) ; National Natural Science Founda-tion of China (NSFC)
源URL[http://ir.iggcas.ac.cn/handle/132A11/106108]  
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Jiang, Maosheng; Chen, Daizhao
作者单位1.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.China Natl Adm Coal Geol, Gen Prospecting Inst, Beijing 100039, Peoples R China
4.SINOPEC, Petr Explorat & Prod Res Inst, Wuxi Res Inst Petr Geol, Wuxi 214126, Jiangsu, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Kang,Jiang, Maosheng,Huang, Taiyu,et al. A reassessment on the timing and potential drivers of the major seawater Sr-87/Sr-86 drop in the Ordovician Period: New evidence from conodonts in China[J]. CHEMICAL GEOLOGY,2022,604:13.
APA Liu, Kang,Jiang, Maosheng,Huang, Taiyu,Zhang, Liyu,Wang, Yuanzheng,&Chen, Daizhao.(2022).A reassessment on the timing and potential drivers of the major seawater Sr-87/Sr-86 drop in the Ordovician Period: New evidence from conodonts in China.CHEMICAL GEOLOGY,604,13.
MLA Liu, Kang,et al."A reassessment on the timing and potential drivers of the major seawater Sr-87/Sr-86 drop in the Ordovician Period: New evidence from conodonts in China".CHEMICAL GEOLOGY 604(2022):13.

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来源：地质与地球物理研究所

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