Core formation in the earth and shergottite parent body (SPB) - Chemical evidence from basalts

Details Core formation in the earth and shergottite parent body (SPB) - Chemical evidence from basalts Core formation in the earth and shergottite parent body (SPB) - Chemical evidence from basalts

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50.1071t&link_type=abstract

(Lunar and Planetary Institute, NASA, American Geophysical Union, et al., Lunar and Planetary Science Conference, 16th, Houston,

Physics

38

Achondrites, Basalt, Chemical Composition, Earth Core, Meteoritic Composition, Planetary Evolution, Abundance, Chemical Fractionation, Mars (Planet), Planetary Cores, Volatility, Meteorites, Stony Meteorites, Achondrites, Samples, Meteorite, Formation, Shergottites, Cores, Earth, Parent Bodies, Chemistry, Basalts, Mars, Snc Meteorites, Neutron Activation Analysis, Inaa, Rnaa, Composition, Mantle, Volatiles, Depletion, Fractionation, Siderophiles, Abundance, Chalcophiles, Comparisons, Models, Accretion, Labo

Scientific paper

Abundances of siderophile and chalcophile elements in the shergottite parental body (SPB) have been compared with those of the earth. To this end, new INAA and RNAA analyses of non-Antarctic meteorites have been performed, and the composition of the shergottite SPB mantle has been inferred from the compositions of the SNC meteorites. The composition of the earth's mantle has been inferred from the compositions of terrestrial basalt. Finally, the effects of volatile depletion, core formation, and mineral/melt fractionation on the abundances of siderophile and chalcophile elements in the SPB and the earth have been taken into consideration. Compared to the earth, the SPB mantle is richer in moderately siderophile elements and more depleted with respect to chalcophile elements. The observed relative abundances of siderophile and chalcophile elements in the SPB and the earth mantles indicate that the SPB underwent accretion and/or differentiation processes which differ from those in the earth.

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