Mathematics – Logic
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002usnc.conf...45o&link_type=abstract
Unmixing the SNCs: Chemical, Isotopic, and Petrologic Components of the Martian Meteorites, p. 45-46
Mathematics
Logic
Basalt, Mars Atmosphere, Shergottites, Xenon, Planetary Evolution, Meteoritic Composition, Mars Surface, Planetary Mantles, Isotope Ratios, Pyroxenes, Fission, Mathematical Models, Lithology, Minerals
Scientific paper
As part of an ongoing study of the shergottites, we have measured the isotopic signature and concentration of xenon in mineral separates of Shergotty and EET79001 Lithology-B. Similarities between the meteorites include the enhanced concentration of martian atmospheric xenon in opaque and maskelynite minerals relative to pyroxene. The interior component appears to be present in all minerals but is best defined in pyroxene separates. This component consists of isotopically solar xenon with a significant contribution from fission xenon and is similar to those observed in Chassigny, ALH84001 and Nakhla. The proportion of fission xenon in the pyroxene separate of EET79001 is lower than that in Shergotty. Pyroxene separates from Shergotty also have a well defined Xe-129/Xe-132 ratio higher than solar. One explanation for these variations and which we were seeking the effects of in this study, is that they reflect the degree of incorporation of crustal material into the parent melt of the shergottites.
Gilmour James D.
Holland Glenn
Ocker K. D.
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