Chemical composition of Mars

Details Chemical composition of Mars Chemical composition of Mars

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979gecoa..43.1601m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 43, Oct. 1979, p. 1601-1610. Research supported by the Swiss National Science Foundation;

Physics

Geophysics

31

Chemical Composition, Mars (Planet), Planetary Composition, Planetology, Abundance, Chemical Fractionation, Chondrites, Mineralogy, Terrestrial Planets, Volatility, Mars, Chemical Composition, Abundances, Uranium, Iron, Outgassing, Argon, Thallium, Core, Composition, Models, Volatiles, Water, Comparisons, Planets, Data, Mineralogy, Mantle, Density, Oxides, Petrology, Geophysics, Thermal History, Origin, Condensation

Scientific paper

The chemical composition of Mars is estimated from the cosmochemical model of Ganapathy and Anders (1974) with additional petrological and geophysical constraints. The model assumes that planets and chondrites underwent the same fractionation processes in the solar nebula, and constraints are imposed by the abundance of the heat-producing elements, U, Th and K, the volatile-rich component and the high density of the mantle. Global abundances of 83 elements are presented, and it is noted that the mantle is an iron-rich garnet wehrlite, nearly identical to the bulk moon composition of Morgan at al. (1978) and that the core is sulfur poor (3.5% S). The comparison of model compositions for the earth, Venus, Mars, the moon and a eucrite parent body suggests that volatile depletion correlates mainly with size rather than with radial distance from the sun.

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