Computer Science
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50..107m&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 50, Jan. 1986, p. 107-110. Research supported by the University of the Ne
Computer Science
14
Meteoritic Composition, Mineralogy, Olivine, Pyroxenes, Ureilites, Achondrites, Iron Oxides, Magnesium, Manganese, Meteorites, Iron, Magnesium, Manganese, Ureilites, Ureilite, Olivine, Pyroxene, Genesis, Origin, Samples, Meteorite, Microprobe Methods, Iron Oxide, Reduction, Magma, Element Ratios, Partitioning, Pigionite, Phases, Fractional Crystallization, Partial Melting, Residue, Models
Scientific paper
Microprobe analyses of ureilite and pigeonite cores are studied. The Fe/Mn-Fe/Mg relationship in the olivine core is examined. It is observed that magnetic processs such as fractional crystallization and partial melting, and FeO reduction contribute to the olivine core composition. The study of the Mg/Mn and Fe/Mn distributions reveals that these two distributions are not in equilibrium in the olivine and pigeonite cores. The effect of a reducing agent, carbon, on the ureilite genesis is investigated. It is concluded that fractional crystallization and FeO reduction are the major processes of ureilite genesis.
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