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Cosmic-ray exposure age and heliocentric distance of the parent body of H chondrites Yamato-75029 and Tsukuba
https://doi.org/10.15094/00006013
https://doi.org/10.15094/00006013d387d3c7-6426-4357-a3ef-0465c8e3bf62
名前 / ファイル | ライセンス | アクション |
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KJ00000041005 (2.0 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 | Cosmic-ray exposure age and heliocentric distance of the parent body of H chondrites Yamato-75029 and Tsukuba | |||||
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 | 10.15094/00006013 | |||||
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) |
Nakashima,Daisuke
× Nakashima,Daisuke× Nakamura,Tomoki× Sekiya, Minoru× Takaoka, Nobuo |
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著者所属(英) | ||||||
en | ||||||
Department of Earth and Planetary Sciences, Graduate School of Sciences, Kyushu University/Department of Earth and Planetary Sciences, Faculty of Sciences, Kyushu University/Department of Earth and Planetary Sciences, Faculty of Sciences, Kyushu University/Department of Earth and Planetary Sciences, Faculty of Sciences, Kyushu University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Many small pieces of the H chondrites Yamato (Y-) 75029 and Tsukuba were investigated to characterize signatures of light noble gases. These meteorites contain large amounts of solar gases as well as cosmogenic ones. A simple regolith exposure model was developed in order to explain the correlations among solar ^<20>Ne and ^<36>Ar and cosmogenic ^<21>Ne concentrations. Based on the regolith model, the parent body exposure ages, heliocentric distances, and space exposure ages of the two meteorites were calculated. The parent body exposure ages were more than 5.5Ma and 11.8Ma for Y-75029 and Tsukuba, respectively. The heliocentric distances were 2.2±^<0.3>_<0.6> AU and 4.2±^<0.4>_<1.2> AU for Y-75029 and Tsukuba, respectively. The space exposure age of Y-75029 was 5.2-5.8Ma, whereas that of Tsukuba was 8.1±0.6Ma. It has been suggested that the parent bodies of H chondrites are S-type asteroids with orbits that range from 2 to 3.5AU in the present solar system. On the other hand, the obtained heliocentric distances of Y-75029 and Tsukuba indicate locations of the parent bodies in the past when some parts of the meteorites were exposed to the sun. The heliocentric distances for Y-75029 is in a good agreement with current S-type asteroid distribution, while that for Tsukuba is at the upper tail of the distribution. | |||||
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. 97-113, 発行日 2002-03 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |