Computer Science – Emerging Technologies
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ssrv...56....1w&link_type=abstract
(Analysis of samples from solar system bodies with emphasis on existing and emerging technologies; Proceedings of the Internatio
Computer Science
Emerging Technologies
10
Cosmochemistry, Mars (Planet), Planetary Composition, Planetary Evolution, Planetary Mass, Chemical Equilibrium, Iron Oxides, Planetary Mantles, Viking Spacecraft, Mars, Chemistry, Accretion, Evolutiion, Iron Oxide, Concentration, Soil, Spacecraft Observations, Viking Missions, Landers, Mantle, Crust, Fractionation, Snc Meteorites, Composition, Elements, Abundance, Iron, Comparisons, Homogeneity, Depletion, Chalcophiles, Mixing Ratio, Volatiles, Water, Rare Gases, Models, Xrfs Instrument, Gallium, Sodium, P
Scientific paper
Using the element correlations observed in SNC-meteorites and general cosmochemical constraints, it is possible to estimate the bulk composition of Mars. Normalized to Si and Cl, the mean abundance value for the elements Ga, Fe, Na, P, K, F, and Rb in the Martian mantle is found to be 0.35 and thus exceeds the terrestrial value by about a factor of two. A two component model is used to describe the composition of the earth's mantle. In this model, component A is highly reduced and almost free of all elements more volatile than Na, while component B is oxidized and contains all elements in C-1 abundances including volatile elements. It is concluded that chemical equilibrium between component A and B was achieved on Mars, leading to the formation of significant amounts of FeS which, on segregation, extracted the elements according to their sulfide-silicate partition equivalents.
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