Deccan traps volcanism implicated in the extinction of non-avian dinosaurs in southeastern China

Mingming Ma*, Wenfang Zhang, Mengting Zhao, Yudan Qiu, Hongming Cai, Jiubin Chen*, Xiuming Liu*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)
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    Abstract

    The extinction of non-avian dinosaurs and its cause(s) have been a matter of debate for several decades. Here we measured Hg and its isotopic composition, heavy metals, and magnetic parameter in a terrestrial basin in southeastern China. Hg exhibited anomalies from 66.4 to 65.6 Ma, with near-zero to positive Δ199Hg values, which reflected the eruption of Deccan Traps (DT) magma. In addition, Hg anomalies coincided with the gradual extinction of non-avian dinosaurs, thereby consistent with the hypothesis that DT played a key role in the mass extinction. Analysis of paleoclimatic records showed that both the Late Maastrichtian warming event (LMWE) and Dan-C2 event occurred at the maxima of the 405-kyr long eccentricity cycle, and the onset of the dinosaur decline was earlier than the LMWE, suggesting that the LMWE played an ancillary role in the mass extinction. The mechanism of how DT caused the mass extinction requires further investigation.

    Original languageEnglish
    Article numbere2022GL100342
    Pages (from-to)1-10
    Number of pages10
    JournalGeophysical Research Letters
    Volume49
    Issue number24
    Early online date15 Dec 2022
    DOIs
    Publication statusPublished - 28 Dec 2022

    Bibliographical note

    Copyright the Author(s) 2022. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

    Keywords

    • Cretaceous–Palaeogene boundary
    • Deccan Traps
    • extinction of non-avian dinosaurs
    • hyperthermals
    • mercury

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