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High temperature methane emissions from Large Igneous Provinces as contributors to late Permian mass extinctions

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  • Chengsheng Chen

    (Chinese Academy of Sciences
    Lancaster University
    CAS Center for Excellence in Deep Earth Science)

  • Shengfei Qin

    (Research Institute of Petroleum Exploration & Development, PetroChina)

  • Yunpeng Wang

    (Chinese Academy of Sciences
    CAS Center for Excellence in Deep Earth Science)

  • Greg Holland

    (the University of Manchester)

  • Peter Wynn

    (Lancaster University)

  • Wanxu Zhong

    (the University of Manchester)

  • Zheng Zhou

    (Lancaster University)

Abstract

Methane (CH4) emissions induced by Large Igneous Provinces have the potential to contribute to global environmental changes that triggered mass extinctions in Earth’s history. Here, we explore the source of methane in gas samples from central Sichuan Basin, which is within the Emeishan Large Igneous Province (ELIP). We report evidence of high methane formation temperatures (between 249−17/+19 and 256−20/+22 °C) from clumped methane measurements and mantle-derived signatures of noble gases, which verify that oil-cracked CH4 and pyrobitumen are by-products within the reservoirs, associated with hydrothermal activity and enhanced heating by the ELIP. We estimate the volume of oil-cracked CH4 induced by the ELIP and argue that CH4 emissions would have been sufficient to initiate global warming prior to the end of the Permian. We also suggest that similar emissions from oil-cracked CH4 associated with the Siberian Traps Large Igneous Province may also have contributed to the end-Permian mass extinction significantly.

Suggested Citation

  • Chengsheng Chen & Shengfei Qin & Yunpeng Wang & Greg Holland & Peter Wynn & Wanxu Zhong & Zheng Zhou, 2022. "High temperature methane emissions from Large Igneous Provinces as contributors to late Permian mass extinctions," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-34645-3
    DOI: 10.1038/s41467-022-34645-3
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    References listed on IDEAS

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    1. Yuyang Wu & Daoliang Chu & Jinnan Tong & Haijun Song & Jacopo Dal Corso & Paul B. Wignall & Huyue Song & Yong Du & Ying Cui, 2021. "Six-fold increase of atmospheric pCO2 during the Permian–Triassic mass extinction," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
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