Computer Science
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981gecoa..45..123h&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 45, Jan. 1981, p. 123-126.
Computer Science
6
Meteorites, Meteoritic Composition, Olivine, Pyroxenes, Breccia, Iron, Manganese, Mineralogy, Space Exploration, Meteorites, Diogenites, Mesosiderites, Olivines, Orthopyroxenes, Manganese, Partitioning, Pallasites, Iron Oxide, Manganese Oxide, Element Ratios, Minerals, Calcium, Distribution, Origin, Dunites
Scientific paper
Diogenites contain equilibrated orthopyroxene-olivine assemblages. Mn is very regularly partitioned between olivine and orthopyroxene in pallasites, diogenites and synthetic eucrite melts, with an FeO/MnO partition ratio for olivine versus orthopyroxene of 1.6 by weight over a very wide range of FeO contents. In contrast to diogenites, Fe and Mn are not regularly partitioned between the olivine and orthopyroxene of mesosiderites and these minerals were not in equilibrium. Mesosiderite olivine differs from diogenite olivine in Fe/Mn and Ca/Mn ratios. Lack of olivine-orthopyroxene equilibrium suggests that olivine in mesosiderites was derived not from a pyroxenite component analogous to diogenites but from dunites.
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