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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
Source PublicationGEOLOGY
ISSN0091-7613
Volume46Issue:9Pages:759-762
Abstract

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
Language英语
WOS KeywordCirculation
Funding ProjectNatural 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 Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000442904600008
Funding OrganizationNatural Science and Engineering Research Council of Canada ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
PublisherGEOLOGICAL SOC AMER, INC
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/16976
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorJin, Jisuo
Affiliation1.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
Recommended Citation
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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