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An abrupt oceanic change and frequent climate fluctuations across the Frasnian-Famennian transition of Late Devonian: Constraints from conodont Sr isotope

文献类型：期刊论文

作者Zhang, Liyu2,4,5; Chen, Daizhao2,4,5; Huang, Taiyu2,4,5; Yu, Hao1; Zhou, Xiqiang2,4; Wang, Jianguo3
刊名GEOLOGICAL JOURNAL
出版日期2019-11-21
页码14
ISSN号0072-1050
关键词climatic fluctuations conodont Sr isotope Late Devonian Frasnian-Famennian transition mass extinction oceanic changes
DOI10.1002/gj.3657
英文摘要The Late Devonian Frasnian-Famennian (F-F) transition witnessed one of the "big five" mass extinction events in the Phanerozoic. We here present high-resolution conodont Sr isotopic data from Fuhe (South China) and Kowala (South Central Poland) sections to reveal coeval climatic and environmental variations and potential causes of this biotic crisis. Fuhe and Kowala sections yield Sr-87/Sr-86 ratios from 0.70815 to 0.70864 and 0.70808 to 0.70836, respectively. These Sr isotopic data demonstrate three distinctive variation cycles (I, II, and III), notably at Fuhe, fluctuating from low (negative) to higher Sr isotope ratios (positive excursion). Temporally, fluctuations I and II occurred immediately before the F-F boundary, and fluctuation III started almost from the onset of the Famennian age. These conodont Sr-87/Sr-86 (low-to-high) fluctuations temporally match well the paces of conodont delta O-18 (low-to-high) and Delta C-13(carb-org) (high-to-low ) fluctuations from the identical section published previously. These Sr isotopic fluctuations thus corroborate the cyclic variations in volcanic activity/flux and weathering intensity/riverine flux in parallel with climate warm-to-cool fluctuations. Mass balance modelling shows the first exceptionally high Sr isotope spike (I) could have been only yielded by a dramatic increase in terrestrial flux in a somewhat restricted Palaeo-Tethys, likely due to the closure of the oceanic domain between Laurussia and Gondwana and sea-level fall. This scenario would enhance the seawater eutrophication/anoxia in the pericontinental basins along the Palaeo-Tethys, causing initial strikes on the low-latitude shallow marine benthos. Subsequently, the frequent climatic fluctuations may have further caused escalating detrimental ecological pressures, leading to their massive demise.
WOS关键词HOLY-CROSS MOUNTAINS ; RARE-EARTH-ELEMENTS ; LAND PLANT EVOLUTION ; MASS EXTINCTION ; BIOTIC CRISIS ; MARINE ANOXIA ; GEOCHEMICAL RECORDS ; CARBON ISOTOPES ; STRONTIUM ; BOUNDARY
资助项目National Natural Science Foundation of China[41072079] ; National Natural Science Foundation of China[41290260] ; National Natural Science Foundation of China[91755210]
WOS研究方向Geology
语种英语
出版者WILEY
WOS记录号WOS:000497773000001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/95787]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Chen, Daizhao
作者单位1.China Minmet Corp, Beijing 100010, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Chinese Petr Soc, Beijing 100724, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Liyu,Chen, Daizhao,Huang, Taiyu,et al. An abrupt oceanic change and frequent climate fluctuations across the Frasnian-Famennian transition of Late Devonian: Constraints from conodont Sr isotope[J]. GEOLOGICAL JOURNAL,2019:14.
APA Zhang, Liyu,Chen, Daizhao,Huang, Taiyu,Yu, Hao,Zhou, Xiqiang,&Wang, Jianguo.(2019).An abrupt oceanic change and frequent climate fluctuations across the Frasnian-Famennian transition of Late Devonian: Constraints from conodont Sr isotope.GEOLOGICAL JOURNAL,14.
MLA Zhang, Liyu,et al."An abrupt oceanic change and frequent climate fluctuations across the Frasnian-Famennian transition of Late Devonian: Constraints from conodont Sr isotope".GEOLOGICAL JOURNAL (2019):14.

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来源：地质与地球物理研究所

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