Preferred orientation of phyllosilicates in Yamato-74642 and -74662, in relation to deformation of C2 chondrites

Details Preferred orientation of phyllosilicates in Yamato-74642 and -74662, in relation to deformation of C2 chondrites Preferred orientation of phyllosilicates in Yamato-74642 and -74662, in relation to deformation of C2 chondrites

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982polre..25..207f&link_type=abstract

(Symposium on Antarctic Meteorites, 7th, Tokyo, Japan, Feb. 19, 20, 1982) National Institute of Polar Research, Memoirs, Special

Physics

Meteorites, Antarctic Meteorites, Phyllosilicates, Yamato Meteorites, Yamato 74642, Yamato 74662, Deformation, C2 Chondrites

Scientific paper

The preferred orientation of phyllosilicates in two Yamato chondrites (C2) has been examined by means of X-ray pole figure goniometry. Both C2 chondrites show almost the same textural features under the optical microscope as those of Murchison (C2) studied previously. In Yamato-74642, however, X-ray diffraction intensity of phyllosilicates is extremely weak and no information on the oriented texture could be obtained. Hydrous minerals in Yamato-74642 have probably been altered by some thermal event. Yamato-74662 possesses a weak but clear preferred orientation of phyllosilicates, indicating evidence of anisotropic deformation. The magnitude of plastic deformation is estimated to be in the order of 10 percent.

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