Shock metamorphism of carbonaceous chondrites

Details Shock metamorphism of carbonaceous chondrites Shock metamorphism of carbonaceous chondrites

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992gecoa..56.4281s&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 56, no. 12, p. 4281-4293.

Physics

58

Carbonaceous Chondrites, Classifications, Impact Loads, Metamorphism (Geology), Petrography, Shock Loads, Chondrule, Microstructure, Optical Microscopes

Scientific paper

Shock effects were studied in 69 carbonaceous chondrites, including CM2, CO3, CV3, ungrouped C2-C4, and CK4-6 chondrites, using optical microscopy of thin sections. It is shown that the classification scheme of Stoeffler et al. (1991) for the progressive stages of shock metamorphism in ordinary chondrites is also applicable to carbonaceous chondrites. On the basis of shock effects in olivine, the 69 carbonaceous chondrites could be assigned to four shock stage, S1 to S4. The CM2 and CO3 groups were found to be the least shocked chondrite groups, whereas the CK4-6 and CV3 were the most strongly shocked groups.

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