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  1. F300 宇宙地球環境研究所
  2. F300a 雑誌掲載論文
  3. 学術雑誌

A mechanism for Nb incorporation in rutile and application of Zr-in-rutile thermometry: A case study from granulite facies paragneisses of the Mogok metamorphic belt, Myanmar

http://hdl.handle.net/2237/00027998
http://hdl.handle.net/2237/00027998
49a970cb-d270-490e-a33b-d4a166955164
名前 / ファイル ライセンス アクション
MMW2017.pdf MMW2017 (2.7 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2018-05-17
タイトル
タイトル A mechanism for Nb incorporation in rutile and application of Zr-in-rutile thermometry: A case study from granulite facies paragneisses of the Mogok metamorphic belt, Myanmar
言語 en
著者 Maw Maw Win

× Maw Maw Win

WEKO 76566

en Maw Maw Win

Search repository
Enami, M.

× Enami, M.

WEKO 76567

en Enami, M.

Search repository
Kato, T.

× Kato, T.

WEKO 76568

en Kato, T.

Search repository
Ye Kyaw Thu

× Ye Kyaw Thu

WEKO 76569

en Ye Kyaw Thu

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
権利
言語 en
権利情報 This article has been published in a revised form in [Mineralogical Magazine] [https://doi.org/10.1180/minmag.2017.081.014]. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. © 2017 The Mineralogical Society of Great Britain and Ireland.
キーワード
主題Scheme Other
主題 niobium
キーワード
主題Scheme Other
主題 zirconium
キーワード
主題Scheme Other
主題 rutile
キーワード
主題Scheme Other
主題 Mogok metamorphic rock
キーワード
主題Scheme Other
主題 Myanmar
抄録
内容記述 Rutile grains occur extensively in host phases of biotite and quartz-feldspar aggregate in high-temperature paragneisses of the Mogok metamorphic belt of Myanmar. They occur as an isolated phase and sometimes show intergrowth texture with ilmenite. Most rutile grains contain up to 3.7 wt.% Nb2O5, which shows positive correlations with Fe and trivalent elements. Niobium substitutes for Ti by a coupled substitution with the trivalent cations (M3^+) of Nb^5+M^3+Ti^4+ -2. Fine-grained rutile grains included in ilmenite are distinctly poor in Nb (<0.1 wt.% as Nb2O5) and contain Fe of 1.7–3.2 wt.% as Fe2O3, suggesting vacancybearing substitution of Fe^3+ 4 Ti^4+ -3□–1, where □ indicates a vacancy. The rutile grains in the felsic phases contain high Zr contents of up to 4200 ppm, suggesting equilibrium temperatures over 800°C using the Ti-in-rutile geothermometer. These high-temperature conditions are consistent with those estimated by conventional methods reported in the literature and suggest widespread occurrences of the upperamphibolite and granulite facies metamorphic rocks in the middle segment of the Mogok metamorphic belt. In contrast, the Zr contents of rutile grains in biotite are usually <1000 ppm, implying equilibrium temperatures lower than 750°C. Most of the rutile grains poorer in Zr might have been included in biotite and were isolated from the zircon-bearing system during an early stage of prograde metamorphism. Some other rutile grains poorer in Zr might have been an exsolved phase from Ti-rich biotite during retrograde metamorphism, which was furthered by the infiltration of metamorphic fluid under lower-amphibolite facies conditions.
言語 en
内容記述タイプ Abstract
内容記述
内容記述 Published online: 26 January 2018
言語 en
内容記述タイプ Other
内容記述
内容記述 ファイル公開:2018-07-26
言語 ja
内容記述タイプ Other
出版者
言語 en
出版者 Cambridge University Press
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ AM
出版タイプResource http://purl.org/coar/version/c_ab4af688f83e57aa
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1180/minmag.2017.081.014
ISSN
収録物識別子タイプ PISSN
収録物識別子 0026-461X
書誌情報 en : Mineralogical Magazine

巻 81, 号 06, p. 1503-1521, 発行日 2017-12
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