Globally distributed iridium layer preserved within the Chicxulub impact structure
نویسندگان
چکیده
The preservation of the iridium-rich layer within Chicxulub crater captures timing K-Pg boundary events.
منابع مشابه
Climatic effects of the Chicxulub impact ejecta
Examining the short and long term effects of the Chicxulub impact is critical for understanding how life developed on Earth. While the aftermath of the initial impact would have produced harmful levels of radiation sufficient for eradicating a large portion of terrestrial life, this process does not explain the concurrent marine extinction. Following the primary impact, a large quantity of smal...
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Impact ejecta from the Albion Formation are exposed in northern Belize. The ejecta come from the outer portion of the continuous ejecta blanket of the Chicxulub crater, which is located 360 km to the northwest. The basal unit of the Albion Formation is a 3⁄41-m-thick clay and dolomite spheroid bed composed of up to four discrete flows. The clay spheroids are altered impact glass, and the dolomi...
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The Chicxulub structure in Yucatan, Mexico, has recently been recognized as a >200-kmdiameter multi-ring impact crater of K-T boundary age. Crystalline impact melt rocks and breccias from within the crater, which have compositions similar to those of normal continental crustal rocks and which show shock metamorphic effects, have been studied for trace element and Re-0s isotope compositions. Re-...
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Introduction: The results presented here are part of an investigation into the evolution of hydrothermal events associated with the Chicxulub impactites in Yu-catan, Mexico. The study focuses on alteration products in core samples recovered from the Yaxcopoil-1 drill hole, which is located some 60 kilometers from the center of the impact structure. This research contributes to the growing knowl...
متن کاملNumerical Modeling of Impact-induced Hydrothermal Activity at the Chicxulub
Introduction: A hypervelocity impact of a large bolide results in a significant but localized temperature increase in the planetary crust, initiating hydrothermal activity if water or ice are present. Evidence of this activity has been observed at several terrestrial craters in the form of alteration mineral assemblages, fraction-ated isotopic compositions, and fluid inclusion chemistry [e.g., ...
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ژورنال
عنوان ژورنال: Science Advances
سال: 2021
ISSN: ['2375-2548']
DOI: https://doi.org/10.1126/sciadv.abe3647