Computer Science
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981metic..16...45o&link_type=abstract
Meteoritics, vol. 16, Mar. 31, 1981, p. 45-59. Research supported by the Field Museum of Natural History.
Computer Science
6
Cavities, Chondrites, Inclusions, Meteoritic Composition, Mineralogy, Shock Heating, Cooling, Melting, Olivine, Vapor Deposition, Meteorites, Ordinary Chondrites, Farmington Meteorite, Phases, Catalogs, Crystals, Morphology, Comparisons, Orvinio Meteorite, Metals, Troilite, Tadjera Meteorite, Rose City Meteorite, Shaw Meteorite, Shock, Fugacity, Heating, Melting, Vapor, Formation, Temperatures, Cooling, Deposition, L5 Chondrites, Vugs, Olivine, Photographs, Pyroxene, Plagioclase, Vaporization, Cooling Rate
Scientific paper
It is noted that vugs occur in Farmington, an ordinary chondrite, and that they contain the same phases present in the body of the meteorite, either as vug wall lining or as crystals attached to linings. The morphologies of these phases are seen as indicating a history of melting and vapor deposition. These vugs are compared with those in the ordinary chondrites Orvinio and Tadjera and with published reports of vugs in the Rose City and Shaw chondrites. It is concluded that while shock events may not cause heating above the liquidus for the body of the meteorite, local pockets of melting and vapor formation do occur because of inhomogeneities in the shock wave pattern. It is pointed out that vugs represent such pockets. Vug formation as a consequence of shock processing is common among ordinary chondrites and shows no correlation with the average temperature of shock heating, subsequent average cooling rate, or blackening of body color.
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