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Reexamination of kimuraite : the occurrence of lanthanite in the cleavages of kimuraite
https://doi.org/10.18999/joueps.60.101
https://doi.org/10.18999/joueps.60.1012e0dc6bc-e184-48ec-928b-5c2891831888
名前 / ファイル | ライセンス | アクション |
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60-3.pdf (1.2 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2014-09-02 | |||||
タイトル | ||||||
タイトル | Reexamination of kimuraite : the occurrence of lanthanite in the cleavages of kimuraite | |||||
言語 | en | |||||
著者 |
JIAO, Wenfang
× JIAO, Wenfang× KAWABE, Iwao× KATO, Takenori |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | rare earth elements | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | kimuraite | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | lanthanite | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | tetrad effect | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We have measured the Ca and REE compositions of seven kimuraite samples, which are subsamples taken from a spherulitic aggregate kimuraite sample filling a void in the alkali olivine basalt. In the chondrite-normalized REE patterns, all samples yielded parallel concave tetrad patterns, and the mole ratios of Σ(REE+ Y) to Ca were calculated to be 2.5 to 3.4, all of which were obviously larger than the ideal value 2.0 of kimuraite. In addition, electron-probe microanalyzer (EPMA) was also applied to determine the compositions of our samples. Though only four rare earth elements (Y, La, Pr and Nd) were able to be measured, the mole ratios of Σ(REE+ Y) to Ca of thirty-two point analyses determined with EPMA were 2.1 to 3.3. Both analytical results demonstrated that our kimuraite samples might have excessive amount of REE. In the backscattered electron (BSE) images, besides dark kimuraite grains, the presence of another mineral with brighter BSE intensity along the cleavages of kimuraite grains was confirmed, and almost all analysis spots of EPMA failed to escape from the contamination of this mineral. The most possible candidate for this mineral is lanthanite, both for its close association with kimuraite and for its characteristic chemical composition. The compositions of our kimuraite samples, especially LREE, have been modified due to the presence of a small portion of lanthanite, but the concave tetrad pattern remains, as lanthanite seems to have a similar concave tetrad pattern like kimuraite. | |||||
言語 | en | |||||
出版者 | ||||||
出版者 | Dept. of Earth and Planetary Sciences, Nagoya University | |||||
言語 | en | |||||
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 | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
ID登録 | ||||||
ID登録 | 10.18999/joueps.60.101 | |||||
ID登録タイプ | JaLC | |||||
ISSN(print) | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 0919-875X | |||||
書誌情報 |
en : The Journal of Earth and Planetary Sciences, Nagoya University 巻 60, p. 101-110, 発行日 2013 |
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著者版フラグ | ||||||
値 | publisher | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/20542 | |||||
識別子タイプ | HDL |