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Equatorial cold-water tongue in the Late Ordovician
Jin, Jisuo1; Zhan, Renbin (詹仁斌)2,3; Wu, Rongchang (吴荣昌)2,3
2018-09-01
发表期刊GEOLOGY
ISSN0091-7613
卷号46期号:9页码:759-762
摘要

The eastern equatorial Pacific cold tongue (EEP-CT) today asserts a vital influence on ocean-atmosphere CO2 exchange and global climate patterns. Here, we report a similar equatorial cold tongue in the Late Ordovician peri-Gondwana region during drastic greenhouse-icehouse climate swings and the first mass extinction. Paleontological, sedimentological, and new stable-oxygen-isotope data from conodont apatite point to a change from warm-water to cool-water tropical depositional environments in the South China plate from Early to Late Ordovician. This apparently contradicts the current paleogeographic reconstructions of a coeval northward drift of South China from subtropical peri-Gondwana to the equator. The trend of climate cooling coincided with the origin and diversification of the Foliomena fauna in South China during the Late Ordovician, and the absence of reef-building sponges and corals. This was in sharp contrast with the Calathium calcareous sponge reefs in Early Ordovician warm-water settings. In this study, we compare the paleogeographic setting of the South China plate in the Late Ordovician with the EEP-CT today where cool-water depositional environments prevail because of cold upwelling and westerly currents.

DOI10.1130/G45302.1
语种英语
关键词[WOS]Circulation
资助项目Natural Science and Engineering Research Council of Canada ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000] ; National Natural Science Foundation of China[41521061]
WOS研究方向Geology
WOS类目Geology
WOS记录号WOS:000442904600008
项目资助者Natural Science and Engineering Research Council of Canada ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
出版者GEOLOGICAL SOC AMER, INC
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/16976
专题中国科学院南京地质古生物研究所
其他
通讯作者Jin, Jisuo
作者单位1.Univ Western Ontario, Dept Earth Sci, London, ON N6A 5B7, Canada
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式
GB/T 7714
Jin, Jisuo,Zhan, Renbin ,Wu, Rongchang . Equatorial cold-water tongue in the Late Ordovician[J]. GEOLOGY,2018,46(9):759-762.
APA Jin, Jisuo,Zhan, Renbin ,&Wu, Rongchang .(2018).Equatorial cold-water tongue in the Late Ordovician.GEOLOGY,46(9),759-762.
MLA Jin, Jisuo,et al."Equatorial cold-water tongue in the Late Ordovician".GEOLOGY 46.9(2018):759-762.
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