气候变化领域集成服务门户(CCPortal): A sudden end-Permian mass extinction in South China

CCPortal

DOI	10.1130/B31909.1
	A sudden end-Permian mass extinction in South China
	Shen S.-Z.; Ramezani J.; Chen J.; Cao C.-Q.; Erwin D.H.; Zhang H.; Xiang L.; Schoepfer S.D.; Henderson C.M.; Zheng Q.-F.; Bowring S.A.; Wang Y.; Li X.-H.; Wang X.-D.; Yuan D.-X.; Zhang Y.-C.; Mu L.; Wang J.; Wu Y.-S.
发表日期	2019
ISSN	167606
起始页码	205
结束页码	223
卷号	131 期号:2021-01-02
英文摘要	Previous studies of the end-Permian mass extinction have established that it was geologically rapid, but condensed sections have made it difficult to establish the exact timing of the extinction relative to fluctuations in the ocean carbon cycle, oxygen levels, and temperature. Integrated high-precision U-Pb geochronology, biostratigraphy, and chemostratigraphy from a highly expanded section at Penglaitan, Guangxi, South China reveal a sudden end-Permian mass extinction that occurred at 251.939 ± 0.031 Ma, which is temporally coincident with the extinction recorded in Bed 25 of the Meishan section. Despite the significantly expanded nature of the section and extensive collecting of more than ten major marine fossil groups, there is no evidence of a decline of biotic diversity prior to the extinction interval and no Permiantype species survive the extinction at this location. Fossil range data suggest a nearly instantaneous extinction at the top of a narrow stratigraphic interval limited to 31 ± 31 k.y. The extinction was preceded by and/or accompanied by fluctuations in δ 13 C carb and δ 13 C org of 2-3‰, and 3-5 °C in seawater temperature. A larger, more rapid seawater temperature rise of 6-8 °C immediately followed the extinction level at Penglaitan. The extinction is spatially associated with a thick unit of tuff and tuffaceous sandstones (Bed 141) indicating massive pyroclastic input. It is correlative with an ash layer (Bed 25) in the deeper water setting at Meishan, where some Permian-type organisms survived the extinction. Our study reveals that the survivability of Permian taxa after the major extinction pulse is variable and dependent upon the severity of environmental perturbation in different sedimentary settings. The sudden extinction may fit a scenario in which the onset of Siberian Traps and South China intensive volcanism ~420 k.y. before the extinction may have diminished the ecological resilience of communities and reduced ecological functions with little change in diversity. In such an environmentally stressed condition, a single environmental disturbance could trigger the sudden collapse of global ecosystems. © 2018 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184979
作者单位	State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Center for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing, 210008, China; Centre for Research and Education on Biological Evolution and Environment, Nanjing University, Nanjing, 210023, China; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenues, Cambridge, MA 02139, United States; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; Department of Paleobiology, MRC-121, National Museum of Natural History, Washington, DC 20013-7012, United States; Department of Geosciences and Natural Resources, Western Carolina University, Cullowhee, NC 28723, United States; Department of Geoscience, University of Calgary, Calgary, AB T2N 1N4, Canada; CAS Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute o...
推荐引用方式 GB/T 7714	Shen S.-Z.,Ramezani J.,Chen J.,et al. A sudden end-Permian mass extinction in South China[J],2019,131(2021-01-02).
APA	Shen S.-Z..,Ramezani J..,Chen J..,Cao C.-Q..,Erwin D.H..,...&Wu Y.-S..(2019).A sudden end-Permian mass extinction in South China.Bulletin of the Geological Society of America,131(2021-01-02).
MLA	Shen S.-Z.,et al."A sudden end-Permian mass extinction in South China".Bulletin of the Geological Society of America 131.2021-01-02(2019).