globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.11.025
论文题名:
High-resolution SIMS oxygen isotope analysis on conodont apatite from South China and implications for the end-Permian mass extinction
作者: Chen J.; Shen S.-Z.; Li X.-H.; Xu Y.-G.; Joachimski M.M.; Bowring S.A.; Erwin D.H.; Yuan D.-X.; Chen B.; Zhang H.; Wang Y.; Cao C.-Q.; Zheng Q.-F.; Mu L.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 448
起始页码: 26
结束页码: 38
语种: 英语
英文关键词: Climate warming ; Conodont apatite ; End-Permian mass extinction ; Oxygen isotope ; SIMS ; South China
英文摘要: Understanding the interplay of climatic and biological events in deep time requires resolving the precise timing and pattern of paleotemperature changes and their temporal relationship with carbon cycle variations and biodiversity fluctuations. In situ oxygen isotope analyses of conodont apatite from South China enables us to reconstruct high-resolution seawater temperature records across the Permian-Triassic boundary (PTB) intervals in the upper slope (Meishan), lower slope (Shangsi), and carbonate platform (Daijiagou and Liangfengya) settings. Constrained by the latest high-precision geochronological dates and high-resolution conodont biozones, we can establish the temporal and spatial patterns of seawater temperature changes and assess their potential connections with the carbon cycle disruption and biodiversity decline. We find a rapid warming of ~10 °C during the latest Permian-earliest Triassic that postdated the onset of the negative shift in δ13Ccarb by ~81 kyr (thousand years), the abrupt decline in δ13Ccarb by ~32 kyr and the onset of mass extinction by ~23 kyr, which contradicts previous claims that the extreme temperature rise started immediately before or coincided with the onset of mass extinction. Our new evidence indicates that climate warming was most likely not a direct cause for the main pulse of the end-Permian mass extinction (EPME), but rather a later participant or a catalyst that increased the pace of the biodiversity decline. In addition, a prominent cooling is recorded in the earliest Changhsingian, with the main phase (a drop of ~8 °C in ~0.2 Ma) confined to the lower part of the Clarkina wangi zone and synchronous with the positive limb of the carbon isotope excursion (CIE) around the Wuchiapingian-Changhsingian boundary (WCB) in Meishan and Shangsi. Further long-term and high-resolution studies from other sections are needed to confirm the full contexts and underlying dynamics of the WCB "cooling event". © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68509
Appears in Collections:过去全球变化的重建

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作者单位: State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; GeoZentrum Nordbayern, Universität Erlangen-Nürnberg, Schlossgarten 5, Erlangen, Germany; Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, United States; Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, MRC-121, Washington, DC, United States; Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China; Department of Invertebrate Palaeontology, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China

Recommended Citation:
Chen J.,Shen S.-Z.,Li X.-H.,et al. High-resolution SIMS oxygen isotope analysis on conodont apatite from South China and implications for the end-Permian mass extinction[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,448
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