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It was observed that the inner part of this eucrite (ALH-78132,78) showed a negative Ce anomaly, while all of the outer part specimens (ALH-78132,71a, b, c and 79) displayed positive Ce anomalies. On the other hand, contents of MgO, FeO and CaO for the outer part of the eucrite were similar to those for the inner part of the eucrite. Ce and Nd isotopic ratios were also determined for ALH-78132,71c, 79 and 78. In the ^\u003c143\u003e(Nd)/^\u003c144\u003e(Nd) vs. ^\u003c147\u003e(Sm)/^\u003c144\u003e(Nd) diagram, all points of ALH-78132,71c, 79 and 78 appeared to fall in the chondritic evolution field within the experimental errors. Meanwhile, in the ^\u003c138\u003e(Ce)/^\u003c142\u003e(Ce) vs. ^\u003c138\u003e(La)/^\u003c142\u003e(Ce) diagram, it was observed that the points of the outer part specimens, ALH-78132,71c and 79,deviated from the chondritic lines, while the point of inner part sample of ALH-78132,78 lied in the chondritic range within the experimental uncertainty. 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Cerium anomaly in REE pattern of Antarctic eucrite
https://nipr.repo.nii.ac.jp/records/1572
https://nipr.repo.nii.ac.jp/records/157292b9dd4f-cc01-467a-8fe1-1cdceae7df1c
名前 / ファイル | ライセンス | アクション |
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KJ00000012205.pdf (1.1 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1983-12-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Cerium anomaly in REE pattern of Antarctic eucrite | |||||
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) |
Shimizu, Hiroshi
× Shimizu, Hiroshi× Masuda, Akimasa× Tanaka, Tsuyoshi |
|||||
著者所属(英) | ||||||
en | ||||||
Department of Chemistry, Faculty of Science,The University of Tokyo | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Chemistry, Faculty of Science,The University of Tokyo | ||||||
著者所属(英) | ||||||
en | ||||||
Geological Survey of Japan | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | To examine the weathering effect, we determined abundances of rare-earth elements (REE), Ba and Sr and contents of major elements (MgO, FeO, CaO, MnO and (Na)_2O) for inner and outer parts of the ALH-78132 Antarctic eucrite. It was observed that the inner part of this eucrite (ALH-78132,78) showed a negative Ce anomaly, while all of the outer part specimens (ALH-78132,71a, b, c and 79) displayed positive Ce anomalies. On the other hand, contents of MgO, FeO and CaO for the outer part of the eucrite were similar to those for the inner part of the eucrite. Ce and Nd isotopic ratios were also determined for ALH-78132,71c, 79 and 78. In the ^<143>(Nd)/^<144>(Nd) vs. ^<147>(Sm)/^<144>(Nd) diagram, all points of ALH-78132,71c, 79 and 78 appeared to fall in the chondritic evolution field within the experimental errors. Meanwhile, in the ^<138>(Ce)/^<142>(Ce) vs. ^<138>(La)/^<142>(Ce) diagram, it was observed that the points of the outer part specimens, ALH-78132,71c and 79,deviated from the chondritic lines, while the point of inner part sample of ALH-78132,78 lied in the chondritic range within the experimental uncertainty. These results suggest strongly that the positive Ce anomaly of the Antarctic eucrite is a result of terrestrial weathering. | |||||
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 30, p. 341-348, 発行日 1983-12 |