Mercury evidence for combustion of organic-rich sediments during the end-Triassic crisis

Jun Shen (), Runsheng Yin (), Thomas J. Algeo, Henrik H. Svensen and Shane D. Schoepfer
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Jun Shen: China University of Geosciences
Runsheng Yin: Chinese Academy of Sciences
Thomas J. Algeo: China University of Geosciences
Henrik H. Svensen: University of Oslo
Shane D. Schoepfer: Western Carolina University

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract The sources of isotopically light carbon released during the end-Triassic mass extinction remain in debate. Here, we use mercury (Hg) concentrations and isotopes from a pelagic Triassic–Jurassic boundary section (Katsuyama, Japan) to track changes in Hg cycling. Because of its location in the central Panthalassa, far from terrigenous runoff, Hg enrichments at Katsuyama record atmospheric Hg deposition. These enrichments are characterized by negative mass independent fractionation (MIF) of odd Hg isotopes, providing evidence of their derivation from terrestrial organic-rich sediments (Δ199Hg

Date: 2022
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DOI: 10.1038/s41467-022-28891-8

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