Other
Scientific paper
Jan 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977gecoa..41...93k&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 41, Jan. 1977, p. 93-111.
Other
39
Chemical Evolution, Fractionation, Iron Meteorites, Metals, Trace Elements, Cooling, Crystallization, Melting, Oxidation-Reduction Reactions, Phase Transformations
Scientific paper
The chemical composition of the metal phase of iron meteorites is traced through an idealized traditional history from condensation, oxidation, and accretion in the nebula to melting, segregation, and freezing in a parent body, considering the following fifteen elements: Au, Co, Cu, Fe, Ga, Ge, Ir, Mo, Ni, Os, Pd, Pt, Re, Rh, and Ru. Twelve iron meteorite groups resolved by Scott and Wasson (1975) are considered in the framework of cosmochemical historical analysis. The parent bodies of five of these groups seem to have had a traditional history. The others seem to have had more unusual histories. For example, the composition of the metal in group IVB matches that predicted for the metal condensate at 1270 K, implying accretion at high temperatures; and the metal in group IVA has a composition indicative of aggregates undergoing progressive stages of partial melting.
Kelly William R.
Larimer John W.
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