Abstract:

Observations under microscope and electron probe analysis results of 28 new meteorites collected from the Grove Mountains ice field, Antarctica, by the 16th Chinese Antarctic Research Expedition, show that two meteorites belong to shergottites, and the other 26 meteorites are classified as ordinary chondrites, including 11 meteorites bearing high iron content ( H group) , 10 with low iron content (L group) and 5 with low iron and other metal phase contents ( LL group) . In H group, there are 5 primitive type 3 meteorites and 6 evolutional meteorites in which the later is further classified into 2 type 4 meteorites, one type 5 meteorite and 3 type 6 meteorites. For the L group, one type 3 meteorite, 2 type 4 meteorites, 2 type 5 meteorites and 5 type 6 meteorites are sub- classified, and 5 meteorites of LL group is also further classified into one type 4 meteorite, 3 type 5 meteorites and one type 6 meteorite. The two shergottites-GRV 99027 and GRV 99018 show they belong to new type meteorites with significance for researches, and are primary ascertained that GRV 99027 may belong to martian Iherzolite, and GRV 99027 may belong to eucrite.