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Science. 2003 Nov 21;302(5649):1388-92.

Chondritic meteorite fragments associated with the Permian-Triassic boundary in Antarctica.

Author information

1
Department of Earth and Environmental Sciences, University of Rochester, Rochester, NY 14627, USA. abasu@earth.rochester.edu

Abstract

Multiple chondritic meteorite fragments have been found in two sedimentary rock samples from an end-Permian bed at Graphite Peak in Antarctica. The Ni/Fe, Co/Ni, and P/Fe ratios in metal grains; the Fe/Mg and Mn/Fe ratios in olivine and pyroxene; and the chemistry of Fe-, Ni-, P-, and S-bearing oxide in the meteorite fragments are typical of CM-type chondritic meteorites. In one sample, the meteoritic fragments are accompanied by more abundant discrete metal grains, which are also found in an end-Permian bed at Meishan, southern China. We discuss the implications of this finding for a suggested global impact event at the Permian-Triassic boundary.

PMID:
14631038
DOI:
10.1126/science.1090852
[Indexed for MEDLINE]
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