Altered fluvial patterns in North China indicate rapid climate change linked to the Permian-Triassic mass extinction

Zhicai Zhu, Yongqing Liu*, Hongwei Kuang, Michael J. Benton, Andrew J. Newell, Huan Xu, Wei An, Shu’an Ji, Shichao Xu, Nan Peng, Qingguo Zhai

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

11 Citations (Scopus)
78 Downloads (Pure)

Abstract

The causes of the severest crisis in the history of life around the Permian-Triassic boundary (PTB) remain controversial. Here we report that the latest Permian alluvial plains in Shanxi, North China, went through a rapid transition from meandering rivers to braided rivers and aeolian systems. Soil carbonate carbon isotope (δ13C), oxygen isotope (δ18O), and geochemical signatures of weathering intensity reveal a consistent pattern of deteriorating environments (cool, arid, and anoxic conditions) and climate fluctuations across the PTB. The synchronous ecological collapse is confirmed by a dramatic reduction or disappearance of dominant plants, tetrapods and invertebrates and a bloom of microbially-induced sedimentary structures. A similar rapid switch in fluvial style is seen worldwide (e.g. Karoo Basin, Russia, Australia) in terrestrial boundary sequences, all of which may be considered against a background of global marine regression. The synchronous global expansion of alluvial fans and high-energy braided streams is a response to abrupt climate change associated with aridity, hypoxia, acid rain, and mass wasting. Where neighbouring uplands were not uplifting or basins subsiding, alluvial fans are absent, but in these areas the climate change is evidenced by the disruption of pedogenesis.

Original languageEnglish
Article number16818
Number of pages11
JournalScientific Reports
Volume9
DOIs
Publication statusPublished - 14 Nov 2019

Keywords

  • environmental impact
  • palaeoclimate
  • palaeontology
  • sedimentology
  • stratigraphy

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