Computer Science
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46.2083l&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 46, Nov. 1982, p. 2083-2097.
Computer Science
16
Chemical Composition, Chondrites, Enstatite, Meteoritic Composition, Mineralogy, Petrography, Aggregates, Cathodoluminescence, Chemical Fractionation, Chondrule, Condensing, Electron Microscopy, Meteoritic Microstructures, Phase Transformations, Solar System, Textures
Scientific paper
The petrography and mineralogy of four Type I enstatite chondrites were examined by optical and cathololuminescent and electron microprobe means to discern particular chemical and mechanical processes present during solar system condensation. The specimens examined included sections of the Indarch, Abee, Kota-Kota, and Adhi-Kot chondrites. Textural interpretations were performed, as well as chemical analyses of the degree of similarity of the clinoenstatite, olivine, accessory silicates, metal, schreibersite, troilite, oldhamite, and niningerite grains in each sample. Simple models of progressive condensation either at equilibrium or with mechanical removal of early condensates were ruled out due to the occurrence of both blue and red enstatite crystals in metal clasts. A need for sequential processes of mixing, melting, crystallization, condensation, fracturing, and mechanical aggregation are suggested as necessary to model the formation mechanisms of the mineral aggregates.
Leitch Catherine A.
Smith Joseph V.
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