An Adulterated Martian Meteorite

Details An Adulterated Martian Meteorite An Adulterated Martian Meteorite

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999psrd.repte..28t&link_type=abstract

Planetary Science Research Discoveries

Mathematics

Logic

Meteoritics, Martian Meteorites, Eeta79001, Geochemistry, Geology, Mars

Scientific paper

Martian meteorite, Elephant Moraine EETA79001, is composed of two distinct rock types. Scientists have thought that both formed from magmas, hence are igneous rocks and contain important information about the interior of Mars, the nature of lava flows on its surface, and the timing of igneous events on Mars. All that is now open to question, as a group of investigators at Lockheed Martin Space Operations and the Johnson Space Center led by David Mittlefehldt (Lockheed) has shown that one of the rock types making up EETA79001, designated lithology A, is almost certainly a melted mixture of other rocks. Mittlefehldt and coworkers suggest that formation by impact melting is the most likely explanation for the chemical and mineralogical features seen in the rock. If confirmed by other investigations, this may change the way we view the igneous evolution of Mars.

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