CM chondrites exhibit the complete petrologic range from type 2 to 1

Details CM chondrites exhibit the complete petrologic range from type 2 to 1 CM chondrites exhibit the complete petrologic range from type 2 to 1

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997gecoa..61.5099z&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 61, p. 5099

Mathematics

Logic

44

Carbonaceous Chondrites, Petrology, Meteoritic Composition, Silicates, Mineralogy, Petrography, Minerals

Scientific paper

The most phyllosilicate-rich members of the CM chondrite group were characterized. The possibility that the so-called C1 lithologic units in highly brecciated CM2 chondrites such as Cold Bokkeveld are actually completely hydrated CM2 chondrites is investigated. Accordingly, all sections of CMs available to the researchers were searched in order to locate additional highly processed lithologies. Several CM chondrites are briefly described which have greater proportions of matrix and phyllosilicates and smaller quantities of olivines and pyroxenes than is typical. Three completely hydrated CMs have also been identified and are called CM1s. These include EET 83334, ALH 88045, and a peculiar lithology in Kaidun (Zolensky et al., 1996b). How these lithologies further constrain physicochemical conditions on hydrous asteroids is described.

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