Search and collection of Yamato meteorites in the 1982-83 field season,Antarctica

• Main Authors: Takayoshi Katsushima, Fumihiko Nishio, Hirokazu Ohmae, Masao Ishikawa, Shuhei Takahashi
• Format: Report
• Language: English
• Published: Department of Geology and Mineralogy, Faculty of Science, Hokkaido University/National Institute of Polar Research/The Institute of Low Temperature Science, Hokkaido University/The Institute of Low Temperature Science, Hokkaido University/Kitami Institute of Technology 1984
• Subjects: Antarctic; Yamato; Antarc*; Antarctica; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1714; http://id.nii.ac.jp/1291/00001714/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1714&item_no=1&attribute_id=18&file_no=1

Search and collection of Antarctic meteorites were carried out by the inland traverse party of the 23rd Japanese Antarctic Research Expedition (JARE-23) in the Meteorite Ice Field near the Yamato Mountains in 1982-83. Collected meteorites (named Yamato-82 meteorites) are 211 specimens, and their total weight is over 35kg. A preliminary study revealed that the Yamato-82 meteorites included 10 carbonaceous chondrites, 5 diogenites, 13 eucrites, 3 unclassified achondrites and a large number of chondrites. Among them, more than 50 specimens were found in the limited area within 1km in diameter, 25km south from Kuwagata Nunatak of the Minami-Yamato Nunataks. Such a meteorite-concentrated area as this one suggests that the sub-ice mountains may exist in the bare ice area and the ice flow carrying meteorites forms a horizontal convergence.