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ファイル
言語
英語
著者
カビール エムデイ ファズレー
内容記述(抄録等)
The Sambagawa metamorphic belt in the Bizan area consists mainly of pelitic schists, basic schists, and siliceous schists, along with minor garnet glaucophane schists. Garnet glaucophane schists consist mainly of garnet and amphibole (glaucophane, ferroglaucophane, barroisite, katophorite and taramite), with minor amounts of epidote, phengite, paragonite, chlorite, albite, titanite, and quartz. Clinopyroxene (jadeite-omphacite), chloritoid, rutile, ilmenite, calcite, K-feldspar, zircon occur occasionally. Amphiboles have five modes of occurrence. Amphiboles inclusions in porphyroblastic garnets are sodic and sodic calcic amphiboles (Amp1; ferroglaucophane, glaucophane, ferrobarroisite, barroisite, taramite). Taramitic amphiboles occur restrictedly in the cores of the porphyroblastic garnets. Amphibole inclusions in the rim of the garnets are zoned, with barroisite core and glaucophane rim. Amphibole inclusions in albite (Amp2), epidote (Amp3) and chlorite (Amp4) are ferroglaucophane in composition. Ferroglaucophane and glaucophane occur in the matrix (Amp5), and some of them are zoned from glaucophane core to barroisite rim. The diversity of the modes of occurrence and chemical compositions of the amphiboles reflect three metamorphic events of the garnet glaucophane schists in the Bizan area. A precursor metamorphic event is represented by the taramitic amphibole inclusions in the core of the porphyroblastic garnet. Schistosity-forming amphiboles (ferroglaucophane, glaucophane), amphiboles inclusions in the porphyroblastic garnets (ferroglaucophane, glaucophane, ferrobarroisite, barroisite) and amphibols included in albite, epidote and chlorite (ferroglaucophane) are representative of the prograde to the peak metamorphism of eclogitic metamorphic event. Barroisite rim of zoned amphiboles is probably developed during the epidote-amphibolite metamorphic event.
主題
Sambagawa (Sanbagawa) metamorphic belt
Bizan area
garnet glaucophane schist
eclogite
amphibole
掲載誌名
島根大学地球資源環境学研究報告
33
開始ページ
29
終了ページ
37
ISSN
13439774
発行日
2015-02-27
NCID
AA11455176
DOI(SelfDOI)
出版者
島根大学大学院総合理工学研究科地球資源環境学教室
資料タイプ
紀要論文
ファイル形式
PDF
著者版/出版社版
出版社版
部局
(旧組織)大学院総合理工学研究科
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