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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
貝沼 雅亮
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 (garnet-aegirine-augite schists), along with minor garnet glaucophane schists. The garnet?aegirine-augite schists consist mainly of quartz and phengite, with minor amounts of amphibole (ferroglaucophane, magnesioriebeckite, riebeckite, Mg-katophorite, winchite, barroisite, ferrobarroisite), garnet, aegirine-augite and albite. Hematite, chlorite, epidote, calcite and titanite occur, occasionally phengites are found in eight modes of occurrence; phengites as inclusions in porphyroblastic garnet (Ph1), amphibole (Ph2), clinopyroxene (Ph3) and albite (Ph4), phengites (Ph5) occurring in the matrix, and phengites as a secondary mineral replacing porphyroblastic garnet (Ph6), amphibole (Ph7) and clinopyroxene (Ph8) along their rim and crack. The diversity of the modes of occurrence and chemical compositions of the phengites reflects two metamorphic events in the garnet-aegirine-augite schists in the Bizan area. Inclusions in garnet (Ph1), amphibole (Ph2) and clinopyroxene (Ph3) and schistosity-forming phengites (Ph5) are representative of the prograde to the peak metamorphism of the eclogitic metamorphic event. Phengites replacing garnet (Ph6), amphibole (Ph7) and clinopyroxene (Ph8) and phengites inclusions in porphyroblastic albites (Ph4) suggest another high-pressure epidote-amphibolite metamorphic event.
主題
Sambagawa (Sanbagawa) metamorphic belt
Bizan area
garnet
aegirine-augite
phengite
掲載誌名
島根大学地球資源環境学研究報告
34
開始ページ
21
終了ページ
30
ISSN
13439774
発行日
2016-03-05
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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