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

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中文题名187Os/188Os比值的长期偏移表明在墨西哥湾希克苏鲁伯撞击事件后存在热液影响
作者Honami Sato12CA1;Akira Ishikawa23;Ignacio Arenillas4;José A. Arz4;Vicente Gilabert45;Philippe Claeys6;Steven Goderis6;Christopher M. Lowery7;Sean P. S. Gulick789;null;Joanna V. Morgan10
作者单位1Department of Earth and Planetary Sciences, Kyushu University, Fukuoka, Japan;2Submarine Resources Research Center, Research Institute for Marine Resources Utilization, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Kanagawa, Japan;3Department of Earth and Planetary Sciences, Institute of Science Tokyo, Meguro-ku, Tokyo, Japan;4Departamento de Ciencias de la Tierra, and Instituto Universitario de Investigación en Ciencias Ambientales de Aragón, Universidad de Zaragoza, Zaragoza, Spain;5Departament de Dinàmica de la Terra i de l’Oceà, Facultat de Ciències de la Terra, Universitat de Barcelona, Barcelona, Spain;6Archaeology, Environmental Changes, and Geo-Chemistry, Vrije Universiteit Brussel, Brussels, Belgium;7Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, USA;8Deparment of Earth and Planetary Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, USA;9Center for Planetary Systems Habitability, University of Texas at Austin, Austin, TX, USA;10Department of Earth Science and Engineering, Imperial College London, SW7 2AZ, London, United Kingdom
刊名Nature Communications
年2025
卷16
期No.1
摘要
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.

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