Xenon components in Martian meteorites - Evidence for atmospheric evolution?

Details Xenon components in Martian meteorites - Evidence for atmospheric evolution? Xenon components in Martian meteorites - Evidence for atmospheric evolution?

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..885m&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 885.

Computer Science

3

Xenon, Mars Atmosphere, Meteorites, Fractionation, Spallation, Mass Spectrometers

Scientific paper

Most SNC meteorites have young solidification ages which imply large-scale outgassing of the parent body during magmatic activity. Xe isotopic signatures observed in these meteorites not only have the potential of tracing the evolution of a planet's atmosphere but also might help to establish relationships among the solar system reservoirs. New measurements of N and Xe in ALH84001, EET79001 and Zagami provide additional constraints. Our results show varying Xe-129/Xe-132 ratios due to component mixtures, but suggest that the Martian atmospheric Xe component evolved early on. Shifts in the heavy Xe isotopes due to additional fission components are small. The atmospheric component may be characterized as solar-type Xe, but mass fractionated by 3.75 percent/amu.

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