160999 20251017144632.0 doi 10.1038/s41467-025-58112-x sideral 144164 ART-2025-144164 eng Sato, Honami Prolonged 187Os/188Os excursion implies hydrothermal influence after the Chicxulub impact in the Gulf of Mexico 2025 Access copy available to the general public Unrestricted 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. info:eu-repo/grantAgreement/ES/AEI/PID2022-136233NB-I00 info:eu-repo/grantAgreement/ES/DGA/E33-23R info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Ishikawa, Akira Arenillas, Ignacio Universidad de Zaragoza (orcid)0000-0003-4632-533X Arz, José A. Universidad de Zaragoza (orcid)0000-0003-0063-8752 Gilabert, Vicente (orcid)0000-0001-7302-5901 Claeys, Philippe Goderis, Steven Lowery, Christopher M. Gulick, Sean P. S. Morgan, Joanna V. 2000 655 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Paleontología 16 (2025), 2901 [11 pp.] Nature communications 2041-1723 1211275 http://zaguan.unizar.es/record/160999/files/texto_completo.pdf Versión publicada 2739979 http://zaguan.unizar.es/record/160999/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:160999 articulos driver 2025-10-17-14:27:09 ARTICLE