Weathering of some Antarctic meteorites: Infrared spectroscopy

• Main Authors: Masamichi Miyamoto, Hideyasu Kojima, Keizo Yanai
• Format: Report
• Language: English
• Published: College of Arts and Sciences, University of Tokyo 1989
• Subjects: Allan Hills; Antarctic; The Antarctic; Yamato; Antarc*
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4491; http://id.nii.ac.jp/1291/00004491/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4491&item_no=1&attribute_id=18&file_no=1

We studied the degree of weathering of some Antarctic meteorites using the integrated intensity of absorption bands near 3μm to enlarge the data base of the degree of weathering. There is no clear correlation between the integrated intensity and the degree of weathering on the A-B-C scale. A rough correlation can be seen between the integrated intensity of absorption bands near 3μm and the total amount of H_2O in a meteorite analyzed by a standard wet chemical analysis method. Some Yamato meteorites measured show weaker integrated intensities than the Allan Hills meteorites measured. Our method to determine the degree of weathering may be useful for choosing less weathered meteorites from among the Antarctic meteorite collection.