Oxygen isotopic compositions of several Antarctic meteorites

Oxygen isotopic compositions are reported for seven carbonaceous chondrites, seven ordinary chondrites, two enstatite chondrites, three lunar meteorites, and twelve achondrites. Three of the achondrites (ALH-77081,Y-74063,and Y-74025) do not belong to known groups; the first two of these are related to Acapulco. Two L-group equilibrated ordinary chondrites (Y-75097 and Y-793241) contain xenoliths with isotopic compositions similar to H chondrites. Among the carbonaceous chondrites, the distinction between C1 and C2 chondrites is ambiguous