Abundances of noble gases on the terrestrial planets

Details Abundances of noble gases on the terrestrial planets Abundances of noble gases on the terrestrial planets

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991geokh......915s&link_type=abstract

Geokhimiia (ISSN 0016-7525), July 1991, p. 915-925. In Russian.

Other

Abundance, Planetary Composition, Rare Gases, Solar System Evolution, Terrestrial Planets, Carbonaceous Chondrites, Chemical Fractionation, Jupiter (Planet), Planetary Evolution, Planetary Nebulae

Scientific paper

Several hypotheses are considered in order to explain large differences in noble gas concentrations (in particular the Ne-20/Xe-130, Kr-84/Ar-36, and Ne-20/Ar-36 ratios) observed between the matter of Mars, Venus, and the earth. It is shown that logarithms of the fractionation coefficients of any two gases depend exponentially on the heliocentric radius of these planets. These dependencies, which are semiquantitative for Mars, Venus, and the earth, are projected to other planets, leading to predictions of noble gas correlations for Mercury and Jupiter. Common dependencies for all the planets point to the fact that present correlations for primary noble gases were established early, probably during the adsorption of the gases by a matter carrier of volatiles of the planets in a protoplanetary cloud.

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