Are all the 'Martian' meteorites from Mars?

Details Are all the 'Martian' meteorites from Mars? Are all the 'Martian' meteorites from Mars?

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.317..509o&link_type=abstract

Nature (ISSN 0028-0836), vol. 317, Oct. 10, 1985, p. 509-512.

Computer Science

41

Cosmochemistry, Mars Atmosphere, Meteoritic Composition, Argon, Atmospheric Composition, Fractionation, Krypton, Mars (Planet), Xenon, Meteorites, Mars, Origin, Snc Meteorites, Shergottites, Nakhlites, Age, Chassignites, Petrology, Geochemistry, Solidification, Parent Bodies, Antarctic Meteorites, Magmatism, Size, Comparisons, Rare Gases, Nitrogen, Composition, Atmosphere, Eeta79001, Elephant Moraine Meteorites, Argon, Analysis, Krypton, Xenon, Radiogenic Material

Scientific paper

It has been suggested that the shergottites, nakhlites and Chassigny, collectively known as the SNC meteorites are derived from Mars. This suggestion is supported by the apparent similarities between the noble gas and nitrogen composition of the present Martian atmosphere and gases trapped in shock-produced glass phases of the shergottite EETA 79001. The analyses of trapped argon, krypton and xenon in Shergotty, Nakhla and Chassigny reported here show, however, that these meteorites do not contain unadulterated noble gases from the Martian atmosphere, fractionated or not. They indicate that for Nakhla and Chassigny, in particular, a Martian origin is only possible if the Martian atmosphere contains a higher fraction of radiogenic 129Xe and of fissiogenic xenon than does xenon in Martian rocks. This is the opposite of the situation on Earth.

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