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

Earth Sciences

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

C. Chen, S. Qin, et al.

This groundbreaking research by Chengsheng Chen, Shengfei Qin, Yunpeng Wang, Greg Holland, Peter Wynn, Wanxu Zhong, and Zheng Zhou reveals that methane emissions from the Emeishan Large Igneous Province played a crucial role in global warming leading up to the end-Permian extinction. The study uncovers high methane formation temperatures and highlights significant environmental implications.

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Playback language: English
Abstract
Methane (CH₄) emissions from Large Igneous Provinces (LIPs) may contribute to global environmental changes causing mass extinctions. This study analyzes gas samples from the Emeishan LIP (ELIP) in the Sichuan Basin, finding high methane formation temperatures (249-256 °C) and mantle-derived noble gases. Oil-cracked CH₄ and pyrobitumen are identified as byproducts of hydrothermal activity and ELIP heating. Estimated CH₄ emissions from ELIP were sufficient to cause global warming before the end-Permian extinction. Similar emissions from the Siberian Traps LIP are suggested as significant contributors to the end-Permian mass extinction.
Publisher
Nature Communications
Published On
Nov 12, 2022
Authors
Chengsheng Chen, Shengfei Qin, Yunpeng Wang, Greg Holland, Peter Wynn, Wanxu Zhong, Zheng Zhou
Tags
Methane emissions
Large Igneous Provinces
End-Permian extinction
Emeishan LIP
Hydrothermal activity
Noble gases
Global warming

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