Opaque Assemblages in CK and CV Carbonaceous Chondrites
نویسنده
چکیده
Introduction: CK carbonaceous chondrites are the only group of carbonaceous chondrites that exhibit thermal metamorphism. As a result, CKs display features of metamorphism such as silicate darkening, recrystallization and shock veins. Calcium Aluminum Inclusions and Fe-Ni metal are rare. Type Chondrule Opaque CAI's Matrix MET01149,11 3 25.0 7.0 2.0 66.0 EET99430,5 4 5.1 3.5 4.7 86.7 QUE99679,7 4 17.4 6.0 3.1 73.5 EET90007,11 5 19.1 7.5 8.7 64.7 QUE99680,8 5 24.0 18.3 n.d. 57.7 EET87860,15 5,6 6.9 11.8 10.7 70.7 LEW87009,13 6 0 4.0 n.d. 79.0 CK group 3,6 15 n.d. 4 75.0 CV group 3 45.0 n.d. 10 40.0 Table 1: Modal Abundances. Data for CV and CK groups from [6] Scott and Krot.
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