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Impact Lithologies and Post-Impact Hydrothermal Alteration Exposed by the Chicxulub Scientific Drilling Project, Yaxcopoil, MexicoThe Chicxulub Scientific Drilling Project recovered a continuous core from the Yaxcopoil-1 (YAX-1) borehole, which is approx.60-65 km from the center of the Chicxulub structure, approx.15 km beyond the limit of the estimated approx.50 km radius transient crater (excavation cavity), but within the rim of the estimated approx.90 km radius final crater. Approximately approx.100 m of melt-bearing impactites were recoverd from a depth of 794 to 895 m, above approx.600 m of underlying megablocks of Cretaceous target sediments, before bottoming at 1511 m. Compared to lithologies at impact craters like the Ries, the YAX-1 impactite sequence is incredibly rich in impact melts of unusual textural variety and complexity. The impactite sequence has also been altered by hydrothermal activity that may have largely been produced by the impact event.
Document ID
20030067064
Acquisition Source
Headquarters
Document Type
Conference Paper
Authors
Kring, David A.
(Arizona Univ. Tucson, AZ, United States)
Zurcher, Lukas
(Arizona Univ. Tucson, AZ, United States)
Horz, Friedrich
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Third International Conference on Large Meteorite Impacts
Subject Category
Geosciences (General)
Funding Number(s)
CONTRACT_GRANT: NSF EAR-01-26055
Distribution Limits
Public
Copyright
Other
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