Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1999-03-01 |
タイトル |
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タイトル |
Noble gases and K-Ar ages of five Rumuruti chondrites Yamato(Y)-75302, Y-791827, Y-793575, Y-82002, and Asuka-881988 |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
ID登録 |
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ID登録 |
10.15094/00005946 |
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ID登録タイプ |
JaLC |
ページ属性 |
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内容記述タイプ |
Other |
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内容記述 |
P(論文) |
著者名(英) |
Nagao,Keisuke
Okazaki,Ryuji
Sawada,Shinobu
Nakamura,Noboru
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著者所属(英) |
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en |
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Laboratory for Earthquake Chemistry, Graduate School of Science, University of Tokyo/Laboratory for Earthquake Chemistry, Graduate School of Science, University of Tokyo/Graduate School of Science and Technology, Kobe University/Graduate School of Science and Technology, Kobe University |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
Noble gases and K concentrations have been determined for aliquot samples prepared from the five Antarctic R-chondrites Yamato (Y)-75302,Y-791827,Y-793575,Y-82002,and Asuka (A)-881988. K-Ar ages of about 4.2Ga were obtained for Y-75302,Y-791827,Y-793575 and A-881988,while Y-82002 showed a slightly younger age of 3.9Ga. The Y-75302,Y-791827 and Y-82002 are enriched in solar light noble gases. Four meteorites Y-75302,Y-791827,Y-82002 and A-881988 have cosmic-ray exposure ages of about 20Ma, while the age of Y-793575 is about 7Ma. Based on the noble gas compositions and K-Ar ages, Y-75302 and Y-791827 are probably paired and Y-82002 may belong to this pair. Relatively high and variable ^<129>Xe/^<132>Xe ratios between 2-3.7 as well as enrichments of heavier Xe isotopes were observed in all R-chondrites. |
雑誌書誌ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA11182426 |
書誌情報 |
Antarctic meteorite research
巻 12,
p. 81-93,
発行日 1999-03
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出版者 |
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出版者 |
National Institute of Polar Research |