Other
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1375w&link_type=abstract
Lunar and Planetary Science, volume 27, page 1375
Other
Cores: Formation, Mars: Interior Composition, Meteorites: Snc, Planetary Accretion
Scientific paper
With the well justified assumption that the refractory elements are present on Mars in C1 abundances observed element correlations in SNC-meteorites can be used to calculate the abundance of moderately volatile and volatile elements in the Martian mantle. The FeO/MnO ratio of SNC-meteorites yields the concentration of oxidized iron in the Martian mantle. If we further assume C1 abundance ratios for Mg, Si, and Fe (total), reliable estimates of the chemical composition of mantle and core of Mars are possible. In light of the two component model of planet formation, the high depletion of chalcophile elements in the Martian mantle indicates that on Mars the volatile element depleted reduced component A and the volatiles containing oxidized component B have been equilibrated with each other during the formation of this planet. In other words, an almost homogeneous accretion is inferred for Mars contrary to the Earth for which an inhomogeneous accretion is the generally preferred model to account for the high abundances of siderophile elements in its mantle.
Dreibus Gerlind
Wanke Heinrich
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