Metal phase in a B1-type CAI fragment of the CV Efremovka chondrite

Details Metal phase in a B1-type CAI fragment of the CV Efremovka chondrite Metal phase in a B1-type CAI fragment of the CV Efremovka chondrite

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991geokh.....1307f&link_type=abstract

Geokhimiia (ISSN 0016-7525), Sept. 1991, p. 1307-1316. In Russian.

Mathematics

Logic

Chondrites, Cosmochemistry, Metal Particles, Meteoritic Composition, Aluminum, Calcium, Chemical Composition, Oxidation, Pyroxenes, Spinel

Scientific paper

Results are presented from petrographical, mineralogical, and chemical analyses of metal particles in two B1-type CAI fragments obtained from the Efremovka CV chondrite. The fragments were found to have a broken outer border consisting mainly of grains of Ca phosphates and a Fe/Ni phase. Both fragments are associated with V2O3-rich pyroxene. All individual particles and veins of the fragments are made up from high-Ni tenite, sometimes enriched in V. It is suggested that all features of the metal phase of this chondrite are a consequence of oxidation, or of partial evaporation of the metal followed by its oxidation, and that the characteristics of the metal phase of the CAI phase of the Efremovka chondrite may correspond to those of the protomatter of some fremdlings, such as the Allende chondrite.

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