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On low noble gas concentrations in Antarctic micrometeorites collected from Kuwagata Nunatak in the Yamato Meteorite Ice Field
https://doi.org/10.15094/00006018
https://doi.org/10.15094/000060183a96f12c-6c0d-4e4e-9882-ec5c35c55f12
名前 / ファイル | ライセンス | アクション |
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KJ00000041010 (1.3 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2002-03-01 | |||||
タイトル | ||||||
タイトル | On low noble gas concentrations in Antarctic micrometeorites collected from Kuwagata Nunatak in the Yamato Meteorite Ice Field | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00006018 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Osawa, Takahito
× Osawa, Takahito× Nagao, Keisuke |
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著者所属(英) | ||||||
en | ||||||
Laboratory for Earthquake Chemistry, Graduate School of Science, The University of Tokyo/Laboratory for Earthquake Chemistry, Graduate School of Science, The University of Tokyo | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Noble gas concentrations and isotopic compositions were determined on Antarctic Micrometeorites (AMMs) collected in Kuwagata Nunatak in the Yamato Meteorite Ice Field around the Yamato Mountains in 1998. Noble gas concentrations in Kuwagata AMMs are lower than those of previously measured Dome Fuji AMMs. The heavy noble gas composition is chondritic and shows no atmospheric contamination. In order to clarify the differences of noble gas concentrations between Kuwagata and Dome Fuji AMMs, statistic calculations were done. The differences in ^4He, ^<40>Ar, ^<84>Kr, and ^<132>Xe concentrations between the two types of AMMs are significant in both F-test and T-test. On the other hand, ^<36>Ar is not significant in the F-test, and ^<20>Ne is not significant in both tests. These results revealed a systematic decrease of noble gas concentrations in Kuwagata AMMs compared to those of the Dome Fuji AMMs. Since jarosite-a by-product mineral from aqueous alteration of sulfide minerals-was detected in Kuwagata samples, He loss may be due to aqueous alteration in Antarctic glacial ice. A contamination by atmospheric noble gases might be avoided by sample preparation using acetone to detach AMMs from stainless steal filters. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11182426 | |||||
書誌情報 |
Antarctic meteorite research 巻 15, p. 165-177, 発行日 2002-03 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |