WEKO3
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REE adundances and Rb-Sr geochronology of Yamato-791197
https://nipr.repo.nii.ac.jp/records/1955
https://nipr.repo.nii.ac.jp/records/1955bd2126d4-b237-4d85-bb4d-6e3a269784b8
名前 / ファイル | ライセンス | アクション |
---|---|---|
KJ00000012509 (1.2 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1986-07-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | REE adundances and Rb-Sr geochronology of Yamato-791197 | |||||
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 | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Takahashi, Kazuya
× Takahashi, Kazuya× Masuda, Akimasa× Shimizu, Hiroshi |
|||||
著者所属(英) | ||||||
en | ||||||
Department of Chemistry, The University of Tokyo/Department of Chemistry, The University of Tokyo/Department of Chemistry, The University of Tokyo | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | The REE abundances and the Sr isotopic compositions were determined for the separated samples and the clast sample of the "lunar meteorite", Yamato-791197. Most of the features of the REE patterns are similar to those of the lunar highland samples, especially a kind of anorthosites. And the positive Ce-anomalies, shown in all REE patterns, appear characteristic of the lunar origin. The age obtained from the Rb-Sr system is 3.89±0.36 b. y. and it is considered that this age shows the time when these materials underwent an event, such as brecciation or impact melting. However, as a noticeable point, the initial ^<87>Sr/^<86>Sr is significantly low, even lower than BABI or LUNI. This result suggests that the source material of these samples might have had very low ^<87>Sr/^<86>Sr and Rb/Sr abundance ratios. The clast sample from the chip subordinate No. 109 has the distinct REE pattern and Sr-isotope ratio. Therefore, this clast can be considered to have been formed by different evolution process from the other samples, and was mingled later with them. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00733561 | |||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 41, p. 96-105, 発行日 1986-07 |