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Prolonged 187Os/188Os excursion implies hydrothermal influence after the Chicxulub impact in the Gulf of Mexico

Author

Listed:
  • Honami Sato

    (Kyushu University
    Japan Agency for Marine-Earth Science and Technology)

  • Akira Ishikawa

    (Japan Agency for Marine-Earth Science and Technology
    Institute of Science Tokyo)

  • Ignacio Arenillas

    (Universidad de Zaragoza)

  • José A. Arz

    (Universidad de Zaragoza)

  • Vicente Gilabert

    (Universidad de Zaragoza
    Universitat de Barcelona)

  • Philippe Claeys

    (Vrije Universiteit Brussel)

  • Steven Goderis

    (Vrije Universiteit Brussel)

  • Christopher M. Lowery

    (University of Texas at Austin)

  • Sean P. S. Gulick

    (University of Texas at Austin
    University of Texas at Austin
    University of Texas at Austin)

  • Joanna V. Morgan

    (SW7 2AZ)

Abstract

The Cretaceous/Paleogene boundary asteroid impact is recorded globally as a negative 187Os/188Os excursion, including in sediments recovered from the IODP-ICDP drilling within the peak ring of the Chicxulub structure in the Gulf of Mexico. The reconstructed marine 187Os/188Os curves can be used for global age correlations on the ~10 kyr scale. However, the versatility of Os isotope clock between the proximal and distal sites remains unclear. This paper presents 187Os/188Os records from early Paleocene sediments deposited in the Chicxulub impact basin and Mexican sites with biochronological scales. The results for these proximal sites show a recovery timescale of ~700 kyr, which is significantly longer than that of the distal sites (~200 kyr). The interval showing the 187Os/188Os decline coincides with the enrichment of hydrothermally-derived Mn, implying that hydrothermal venting at the Chicxulub structure may have played a role in the marine chemistry and ecosystem of the Gulf of Mexico.

Suggested Citation

  • Honami Sato & Akira Ishikawa & Ignacio Arenillas & José A. Arz & Vicente Gilabert & Philippe Claeys & Steven Goderis & Christopher M. Lowery & Sean P. S. Gulick & Joanna V. Morgan, 2025. "Prolonged 187Os/188Os excursion implies hydrothermal influence after the Chicxulub impact in the Gulf of Mexico," Nature Communications, Nature, vol. 16(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-58112-x
    DOI: 10.1038/s41467-025-58112-x
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