Mineralogical study of Paired Miller Range 09 and Reid 013 Brachinites

Abstract

We observed and analyzed four meteorites (Reid 013, Miller Range 090206/090340/090405). Reid 013 is a brachinite and MILs are brachinite-like meteorites. We found b axis concentration of crystallographic preferred orientation (CPO) in olivine from the four meteorites. This indicates that these meteorites were formed as cumulate rocks. On the other hand, other brachinites (EET 99407 and ALH 84025) shows c axis concentration of CPO. We continue to study what makes this difference in brachinite.