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Major and trace element chemistry of the garnets within the Sambagawa pelitic schists in the Asemigawa area, central Shikoku, Japan
日本語以外のタイトル
Major and trace element chemistry of the garnets within the Sambagawa pelitic schists in the Asemigawa area, central Shikoku, Japan
ファイル
言語
日本語
著者
薗部 美穂子
内容記述(抄録等)
Garnets within the Sambagawa pelitic schists show distinct major and trace element zoning.The chemical compositions of the major(Mn,Fe,Mg and Ca)and trace(Na,Ti,Cr,V,Sc,Y,Er and Yb)elements in the garnets were determined using an electron probe microanalyzer(EPMA).
The pelitic schists analyzed were collected from the garnet zone,through the albite-biotite zone,up to the oligoclase-biotite zone.The cores of garnets in the garnet zone are higher in Mn/(Mn+Fe+Mg)that in the albite- and oligoclase-biotite zones.In the albite- and oligoclase-biotite zones,the maximum Mn/(Mn+Fe+Mg)at the cores of the garnets are almost the same.Mg/(Mn+Fe+Mg)at the outermost rims of the garnets increases with increasing metamorphic grade.The maximum Mg/(Mn+Fe+Mg)value is 0.07 for the garnet zone,0.08 for the albite-biotite zone(lower),0.11 for the albite-biotite zone(upper),and 0.16 for the oligoclase-biotite zone.
In the garnets within the pelitic schists in the Asemigawa area,the maximum abundances of Na,Y,Er and Yb contents generally occur in the core,and their contents decrease towards the rim.There are,however,extremely high-trace element
(Na,Y,Er and Yb)zones in the mantle of the garnets.In some garnets,the trace element contents in these zones are more than ten times higher than that of the surrounding mantle.
掲載誌名
島根大学地球資源環境学研究報告
19
開始ページ
151
終了ページ
166
ISSN
13439774
発行日
2000-12-25
NCID
AA11455176
DOI(SelfDOI)
出版者
島根大学総合理工学部地球資源環境学教室
出版者別表記
Department of Geoscience, Interdisciplinary Faculty of Science and Engineering, Shimane University
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
備考
12-14,16+ / 1993+
徳岡隆夫教授退官記念論誌集
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