Prolonged 187Os/188Os excursion implies hydrothermal influence after the Chicxulub impact in the Gulf of Mexico
Sato, H.; Ishikawa, A.; Arenillas, I.; Arz, J.A.; Gilabert, V.; Claeys, P.; Goderis, S.; Lowery, C.M.; Gulick, S.P.S.; Morgan, J.V. (2025). Prolonged 187Os/188Os excursion implies hydrothermal influence after the Chicxulub impact in the Gulf of Mexico. Nature Comm. 16(1): 2901. https://dx.doi.org/10.1038/s41467-025-58112-x
In: Nature Communications. Nature Publishing Group: London. ISSN 2041-1723; e-ISSN 2041-1723, more
|  |
| Author keywords |
cretaceous-tertiary boundary;platinum-group elements;osmium isotope;siderophile element;deccan volcanism;melt rock;crater;extinction;recovery;atlantic |
| Authors | | Top |
- Sato, H.
- Ishikawa, A.
- Arenillas, I.
- Arz, J.A.
|
- Gilabert, V.
- Claeys, P., more
- Goderis, S., more
|
- Lowery, C.M.
- Gulick, S.P.S.
- Morgan, J.V.
|
| Abstract |
The Cretaceous/Paleogene boundary asteroid impact is recorded globally as a negative Os-187/Os-188 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 Os-187/Os-188 curves can be used for global age correlations on the similar to 10 kyr scale. However, the versatility of Os isotope clock between the proximal and distal sites remains unclear. This paper presents Os-187/Os-188 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 similar to 700 kyr, which is significantly longer than that of the distal sites (similar to 200 kyr). The interval showing the Os-187/Os-188 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. |
|
