Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993natur.364..325b&link_type=abstract
Nature (ISSN 0028-0836), vol. 364, no. 6435, p. 325-327.
Astronomy and Astrophysics
Astrophysics
42
Cretaceous-Tertiary Boundary, Glass, Isotopes, Melting, Meteoritic Damage, Rocks, Craters, Oxygen 18, Radioactive Age Determination
Scientific paper
Strontium, neodymium, and oxygen isotopic compositions are reported for core samples of impact melt rock recovered from drill holes into the Chicxulub and Manson craters, which are candidate source craters for the catastrophic impact that occurred at the boundary between the Cretaceous and Tertiary periods (K/T boundary). The data are compared with previously published isotopic data from impact glasses from the K/T boundary of the Beloc formation in Haiti. It is found that the Chicxulub melt rocks are isotopically indistinguishable from the K/T impact glass, supporting the hypothesis that Chicxulub is a source crater for the K/T catastrophe. In contrast, the Manson melt rocks have a clearly different isotopic composition.
Blum Joel D.
Chamberlain Page C.
Hingston Michael P.
Koeberl Christian
Marin Luis E.
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