Structural uplift beneath the Chicxulub impact structure
نویسندگان
چکیده
منابع مشابه
Buried layers beneath south rim of Valles Marineris revealed by central uplift of impact craters
Introduction: Mars Orbiter Camera (MOC) revealed over the last decade light-toned deposits at the surface of Mars [1]. These deposits outcrop mainly between 30°N and 30° S, i.e. in the equatorial regions [2]. They are observed in distinct contexts : 1) In the Valles Marineris canyon system with as thick as 4 km of light toned layers inside the canyons [3], and a few meter thick sequence of ligh...
متن کاملClimatic 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...
متن کاملChicxulub impact ejecta from Albion Island, Belize
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...
متن کاملEvidence for a meteoritic component in impact melt rock from the Chicxulub structure
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-...
متن کاملPreliminary Results on the Post-impact Hydrothermal Alteration in the Yaxcopoil-1 Hole, Chicxulub Impact Structure, Mexico
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...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2008
ISSN: 0148-0227
DOI: 10.1029/2007jb005393