Chromite and chromite chondrules in meteorites--I

Details Chromite and chromite chondrules in meteorites--I Chromite and chromite chondrules in meteorites--I

Oct 1967

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967gecoa..31.1961r&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 31, Issue 10, pp.1961-1962

Computer Science

14

Scientific paper

In a number of chondrites, several chondrules have been found containing chromite as a major component. The second, most common mineral in these chondrules is usually an albite-like plagioclase. Besides coarse grains of chromite, many chondrules contain fine chromite grains, intergrown with feldspar as pseudomorphs after a previously decomposed mineral, probably kosmochlor. Transitions to chromite aggregates, which may represent deformed chondrules, are present. All of the chromite-chondrules, reported on here, are firmly intergrown with the meteorite matrix; feldspar is the binding mineral. Since skeletal crystals of chromite are present in several chondrules, they must have formed at very high temperatures and cooled rapidly. The possibility that "metamorphism" of chondrites caused the welding of many chondrules with the meteorite matrix is also discussed. According to the author's opinion, most properties of "metamorphosed" chondrites can be explained more readily by a high temperature of formation followed by slow cooling.

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