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  1. B100 理学部/理学研究科
  2. B100b 紀要
  3. The Journal of earth and planetary sciences
  4. 60

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.60.101
2e0dc6bc-e184-48ec-928b-5c2891831888
名前 / ファイル ライセンス アクション
60-3.pdf 60-3.pdf (1.2 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
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

WEKO 53525

en JIAO, Wenfang

Search repository
KAWABE, Iwao

× KAWABE, Iwao

WEKO 53526

en KAWABE, Iwao

Search repository
KATO, Takenori

× KATO, Takenori

WEKO 53527

en KATO, Takenori

Search repository
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 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
内容記述タイプ Abstract
出版者
言語 en
出版者 Dept. of Earth and Planetary Sciences, Nagoya University
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
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
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
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