Chromite and olivine in type II chondrules in carbonaceous and ordinary chondrites - Implications for thermal histories and group differences

Details Chromite and olivine in type II chondrules in carbonaceous and ordinary chondrites - Implications for thermal histories and group differences Chromite and olivine in type II chondrules in carbonaceous and ordinary chondrites - Implications for thermal histories and group differences

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55..893j&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 55, March 1991, p. 893-904.

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Carbonaceous Chondrites, Chondrule, Chromites, Meteoritic Composition, Olivine, Chondrites, Inorganic Sulfides, Mineralogy, Zinc, Meteorites, Chromite, Olivine, Mineralogy, Chondrules, Chondrites, Stony Meteorites, C Chondrites, Ordinary Chondrites, Thermal History, Cm2 Chondrites, Co3 Chondrites, Cv3 Chondrites, H Chondrites, Catalog, Ll Chondrites, L Chondrites, Metamorphism, Petrography, Partitioning, Alteration, Heating, Comparisons, Composition, Melting, Procedure, Thermal Effects, Parent Bodies, Sampl

Scientific paper

Unequilibrated chromite and olivine margin compositions in type II chondrules are noted to differ systematically among three of the chondrite groups, suggesting that type II liquids differed in composition among the groups. These differences may be interpreted as indicators of different chemical compositions of the precursor solids which underwent melting, or, perhaps, as differences in the extent to which immiscible metal sulfide droplets were lost during chondrule formation. Because zinc is detectable only in type II chromites which have undergone reequilibration, the high zinc contents reported for chondritic chromites in other studies probably reflect redistribution during thermal metamorphism.

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