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Mid-Cretaceous marine Os isotope evidence for heterogeneous cause of oceanic anoxic events

Author

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  • Hironao Matsumoto

    (The University of Tokyo)

  • Rodolfo Coccioni

    (University of Urbino, Carlo Bo)

  • Fabrizio Frontalini

    (DiSPeA, University of Urbino Carlo Bo, Campus Scientifico Enrico Mattei, Località Crocicchia)

  • Kotaro Shirai

    (The University of Tokyo)

  • Luigi Jovane

    (Instituto Oceanográfico, Universidade de São Paulo, Praça do Oceanográfico, 191)

  • Ricardo Trindade

    (Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, Rua do Matão)

  • Jairo F. Savian

    (Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500)

  • Junichiro Kuroda

    (The University of Tokyo)

Abstract

During the mid-Cretaceous, the Earth experienced several environmental perturbations, including an extremely warm climate and Oceanic Anoxic Events (OAEs). Submarine volcanic episodes associated with formation of large igneous provinces (LIPs) may have triggered these perturbations. The osmium isotopic ratio (187Os/188Os) is a suitable proxy for tracing hydrothermal activity associated with the LIPs formation, but 187Os/188Os data from the mid-Cretaceous are limited to short time intervals. Here we provide a continuous high-resolution marine 187Os/188Os record covering all mid-Cretaceous OAEs. Several OAEs (OAE1a, Wezel and Fallot events, and OAE2) correspond to unradiogenic 187Os/188Os shifts, suggesting that they were triggered by massive submarine volcanic episodes. However, minor OAEs (OAE1c and OAE1d), which do not show pronounced unradiogenic 187Os/188Os shifts, were likely caused by enhanced monsoonal activity. Because the subaerial LIPs volcanic episodes and Circum-Pacific volcanism correspond to the highest temperature and pCO2 during the mid-Cretaceous, they may have caused the hot mid-Cretaceous climate.

Suggested Citation

  • Hironao Matsumoto & Rodolfo Coccioni & Fabrizio Frontalini & Kotaro Shirai & Luigi Jovane & Ricardo Trindade & Jairo F. Savian & Junichiro Kuroda, 2022. "Mid-Cretaceous marine Os isotope evidence for heterogeneous cause of oceanic anoxic events," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-021-27817-0
    DOI: 10.1038/s41467-021-27817-0
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    Cited by:

    1. C. A. Walker-Trivett & S. Kender & K. A. Bogus & K. Littler & T. Edvardsen & M. J. Leng & J. Lacey & J. B. Riding & I. L. Millar & D. Wagner, 2024. "Oceanic Anoxic Event 2 triggered by Kerguelen volcanism," Nature Communications, Nature, vol. 15(1), pages 1-12, December.

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