@article{oai:nipr.repo.nii.ac.jp:00004457,
 author = {Kaneoka, Ichiro and Takaoka, Nobuo and Yanai, Keizo},
 journal = {Proceedings of the NIPR Symposium on Antarctic Meteorites},
 month = {Mar},
 note = {P(論文), ^<40>Ar-^<39>Ar analyses were performed on the host phase of an H-clast bearing chondrite Yamato-75097 (L6). The result indicates a typical U-shaped age spectrum, suggesting that the serious degassing event occurred at about 490Ma or slightly younger age for this meteorite. Since the meteorite shows a sign of shock, this event might have been a collisional event. It is estimated that more than 99% of radiogenic ^<40>Ar was degassed during this event. For this degassing, it requires prolonged time of at least a few hours even at 1200℃, and a longer time is required if the ambient temperature is lower and the diffusion mainly controls the degassing process.},
 pages = {206--214},
 title = {40Ar-39Ar analyses of Yamato-75097 (L6) chondrite from Antarctica},
 volume = {1},
 year = {1988}
}