Physics
Scientific paper
Feb 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979e%26psl..42..239s&link_type=abstract
Earth and Planetary Science Letters, vol. 42, no. 2, Feb. 1979, p. 239-242.
Physics
6
Achondrites, Earth Mantle, Earth-Moon System, Planetary Evolution, Trace Elements, Basalt, Deposition, Planets, Parent Bodies, Meteorites, Trace Elements, Shergottite Meteorites, Concentrations, Siderophile Elements, Volatile Elements, Moon, Origin, Earth, Evolution, Upper Mantle, Basalts, Terrestrial
Scientific paper
The average concentrations of 19 siderophile and volatile elements in shergottite meteorites differ from those in terrestrial basalts by less than a factor of ten. This observation undermines claims that the abundances of siderophile and volatile elements in the Earth's upper mantle are uniquely terrestrial. Claims that similarities in the Moon's siderophile element pattern imply a terrestrial origin for the Moon are also weakened. The implication that basalt source regions on the asteroidal parent body of the shergottites resembled the terrestrial upper mantle constrains models of planetary formation and evolution. Heterogeneous accretion models may explain many of the similarities between these planets. Alternatively, separation of sulfide from basaltic magmas or their source regions on the Earth and the shergottite parent body may explain some of these similarities.
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