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Chicxulub Crater, Yucatan: Tektites, impact glasses, and the geochemistry of target rocks and breccias

1993; Geological Society of America; Volume: 21; Issue: 3 Linguagem: Inglês

10.1130/0091-7613(1993)021 2.3.co;2

1943-2682

Christian Koeberl,

Geological and Geophysical Studies Worldwide

Research Article| March 01, 1993 Chicxulub Crater, Yucatan: Tektites, impact glasses, and the geochemistry of target rocks and breccias Christian Koeberl Christian Koeberl 1Institute of Geochemistry, University of Vienna, A-1010 Vienna, Austria Search for other works by this author on: GSW Google Scholar Geology (1993) 21 (3): 211–214. https://doi.org/10.1130/0091-7613(1993)021 2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Christian Koeberl; Chicxulub Crater, Yucatan: Tektites, impact glasses, and the geochemistry of target rocks and breccias. Geology 1993;; 21 (3): 211–214. doi: https://doi.org/10.1130/0091-7613(1993)021 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract A comparison of breccias and basement rocks from four drill holes near the Chicxulub impact structure, Yucatan (a possible Cretaceous-Tertiary [K-T] boundary crater), with black and yellow impact glasses from the Haitian K-T boundary layer shows that mixtures of andesite-like rocks with carbonates and evaporites from Chicxulub are compositionally different from the yellow glasses. At the time of impact, the Chicxulub area was covered by evaporitic and carbonate deposits several kilometres thick. Because impact glasses are generally produced by shock melting of surface rocks, a link between the Haitian glasses and Chicxulub is difficult to understand. The δ34S isotopic signature of Chicxulub breccias and evaporites is incompatible with that of a continental K-T boundary. We suggest that the pre-impact target stratigraphy at Chicxulub as well as the interpretation of the carbonate-evaporite rocks as breccias should be revised. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.