Oxygen isotopic compositions of several Antarctic meteorites

• Main Authors: Toshiko K. Mayeda, Robert N. Clayton, Keizo Yanai
• Format: Report
• Language: English
• Published: Enrico Fermi Institute, University of Chicago 1987
• Subjects: Antarctic; Antarc*; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2129; http://id.nii.ac.jp/1291/00002129/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2129&item_no=1&attribute_id=18&file_no=1

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.