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

Sato, Honami ; Ishikawa, Akira ; Arenillas, Ignacio (Universidad de Zaragoza) ; Arz, José A. (Universidad de Zaragoza) ; Gilabert, Vicente ; Claeys, Philippe ; Goderis, Steven ; Lowery, Christopher M. ; Gulick, Sean P. S. ; Morgan, Joanna V.

Resumen: 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.

Idioma: Inglés

DOI: 10.1038/s41467-025-58112-x

Año: 2025

Publicado en: Nature communications 16 (2025), 2901 [11 pp.]
ISSN: 2041-1723

Financiación: info:eu-repo/grantAgreement/ES/AEI/PID2022-136233NB-I00
Financiación: info:eu-repo/grantAgreement/ES/DGA/E33-23R

Tipo y forma: Article (Published version)

Área (Departamento): Área Paleontología (Dpto. Ciencias de la Tierra)