Integrated Sr isotope variations and global environmental changes through the late permian to early late triassic

Song, Haijun, Wignall, Paul B., Tong, Jinnan, Song, Huyue, Chen, Jing, Chu, Daoliang, Tian ,Li, Luo, Mao, Zong, Keqing, Chen, Yanlong, Lai, Xulong, Zhang, Kexin and Wang, Hongmei 2015, Integrated Sr isotope variations and global environmental changes through the late permian to early late triassic, Earth and planetary science letters, vol. 424, pp. 140-147.

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Title Integrated Sr isotope variations and global environmental changes through the late permian to early late triassic
Author(s) Song, Haijun
Wignall, Paul B.
Tong, Jinnan
Song, Huyue
Chen, Jing
Chu, Daoliang
Tian ,Li
Luo, MaoORCID iD for Luo, Mao
Zong, Keqing
Chen, Yanlong
Lai, Xulong
Zhang, Kexin
Wang, Hongmei
Journal name Earth and planetary science letters
Volume number 424
Start page 140
End page 147
Total pages 8
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015-08-05
ISSN 0012-821X
Keyword(s) Conodonts
Continental weathering
Early Triassic
Permian-Triassic extinction
Strontium isotopes
Summary New 87Sr/86Sr data based on 127 well-preserved and well-dated conodont samples from South China were measured using a new technique (LA-MC-ICPMS) based on single conodont albid crown analysis. These reveal a spectacular climb in seawater 87Sr/86Sr ratios during the Early Triassic that was the most rapid of the Phanerozoic. The rapid increase began in Bed 25 of the Meishan section (GSSP of the Permian-Triassic boundary, PTB), and coincided closely with the latest Permian extinction. Modeling results indicate that the accelerated rise of 87Sr/86Sr ratios can be ascribed to a rapid increase (>2.8×) of riverine flux of Sr caused by intensified weathering. This phenomenon could in turn be related to an intensification of warming-driven runoff and vegetation die-off. Continued rise of 87Sr/86Sr ratios in the Early Triassic indicates that continental weathering rates were enhanced >1.9 times compared to those of the Late Permian. Continental weathering rates began to decline in the middle-late Spathian, which may have played a role in the decrease of oceanic anoxia and recovery of marine benthos. The 87Sr/86Sr values decline gradually into the Middle Triassic to an equilibrium values around 1.2 times those of the Late Permian level, suggesting that vegetation coverage did not attain pre-extinction levels thereby allowing higher runoff.
Language eng
Field of Research 040308 Palaeontology (incl Palynology)
060399 Evolutionary Biology not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2015, Elsevier
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Document type: Journal Article
Collection: School of Life and Environmental Sciences
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