Abstract:

Of a total of 28 meteorites collected in Grove Mountains, Antarctica, by the 16th CHIN-ARE, there are 20 equilibrated ordinary chondrites. The others include 1 martian meteorite, 1 HED meteorite and 6 L3 ordinary chondrites. These 20 equilibrated ordinary chondrites are classified into chemical groups of H, L and LL, respectively, based on mean Fa content of oli-vine, mean Fs of low - Ca pyroxene and abundance of Fe-Ni metal. Their petrographic types of 4 to 6 are assigned according to structures of chondrules, degree of recrystallization of matrix and homogeneity of composition of major phases. Classification of these 20 equilibrated ordinary chondrites are as following; 6 meteorites of H group (3 H4, 1 H5 and 2 H6) , 9 of L group (3 L4, 1 L5 and 5 L6) and 5 of LL group (2 LL4 and 3 LL5).