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Intensified continental chemical weathering and carbon-cycle perturbations linked to volcanism during the Triassic–Jurassic transition

Author

Listed:
  • Jun Shen

    (China University of Geosciences)

  • Runsheng Yin

    (Chinese Academy of Sciences)

  • Shuang Zhang

    (Texas A&M University)

  • Thomas J. Algeo

    (China University of Geosciences
    China University of Geosciences
    University of Cincinnati)

  • David J. Bottjer

    (University of Southern California)

  • Jianxin Yu

    (China University of Geosciences)

  • Guozhen Xu

    (China University of Geosciences)

  • Donald Penman

    (Utah State University)

  • Yongdong Wang

    (Chinese Academy of Sciences)

  • Liqin Li

    (Chinese Academy of Sciences)

  • Xiao Shi

    (Jilin University, Changchun)

  • Noah J. Planavsky

    (Yale University)

  • Qinglai Feng

    (China University of Geosciences)

  • Shucheng Xie

    (China University of Geosciences)

Abstract

Direct evidence of intense chemical weathering induced by volcanism is rare in sedimentary successions. Here, we undertake a multiproxy analysis (including organic carbon isotopes, mercury (Hg) concentrations and isotopes, chemical index of alteration (CIA), and clay minerals) of two well-dated Triassic–Jurassic (T–J) boundary sections representing high- and low/middle-paleolatitude sites. Both sections show increasing CIA in association with Hg peaks near the T–J boundary. We interpret these results as reflecting volcanism-induced intensification of continental chemical weathering, which is also supported by negative mass-independent fractionation (MIF) of odd Hg isotopes. The interval of enhanced chemical weathering persisted for ~2 million years, which is consistent with carbon-cycle model results of the time needed to drawdown excess atmospheric CO2 following a carbon release event. Lastly, these data also demonstrate that high-latitude continental settings are more sensitive than low/middle-latitude sites to shifts in weathering intensity during climatic warming events.

Suggested Citation

  • Jun Shen & Runsheng Yin & Shuang Zhang & Thomas J. Algeo & David J. Bottjer & Jianxin Yu & Guozhen Xu & Donald Penman & Yongdong Wang & Liqin Li & Xiao Shi & Noah J. Planavsky & Qinglai Feng & Shuchen, 2022. "Intensified continental chemical weathering and carbon-cycle perturbations linked to volcanism during the Triassic–Jurassic transition," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-27965-x
    DOI: 10.1038/s41467-022-27965-x
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    Cited by:

    1. Remco Bos & Wang Zheng & Sofie Lindström & Hamed Sanei & Irene Waajen & Isabel M. Fendley & Tamsin A. Mather & Yang Wang & Jan Rohovec & Tomáš Navrátil & Appy Sluijs & Bas Schootbrugge, 2024. "Climate-forced Hg-remobilization associated with fern mutagenesis in the aftermath of the end-Triassic extinction," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    2. Jun Shen & Runsheng Yin & Thomas J. Algeo & Henrik H. Svensen & Shane D. Schoepfer, 2022. "Mercury evidence for combustion of organic-rich sediments during the end-Triassic crisis," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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