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Chemistry of rock-forming minerals in epidote amphibolites and eclogites in the Tonaru epidote-amphibolite mass in the Sambagawa metamorphic belt, Besshi district, central Shikoku, southwest Japan
Title Alternative (English)
Chemistry of rock-forming minerals in epidote amphibolites and eclogites in the Tonaru epidote-amphibolite mass in the Sambagawa metamorphic belt, Besshi district, central Shikoku, southwest Japan
File
language
jpn
Author
Miyagi, Yasuo
Description
The Tonaru epidote amphibolite mass is one of several tectonic blocks occurring in the Sambagawa metamorphic belt,central Shikoku,Japan.It consists mainly of various types of epidote-amphibolites with diverse lithology,and minor eclogites surviving after amphibolitization.There are two types of amphibolite:T-I and T-II type amphibolites.T-I type amphibolite is composed of clinopyroxene-amphibolite and serpentinite,and T-II type amphibolite is composed of epidote-amphibolite and eclogite.
EPMA analyses of the constituent minerals in the Tonaru mass show that garnets in T-II type amphibolite are of almandine-rich type,and that omphacites in T-II eclogites have maximum Jd contents of 45 mol.%.Amphiboles from the epidote amphibolites in both T-I and T-II type amphibolites are classified mostly as Ca-amphiboles.Amphibole inclusions in the garnets in T-II eclogites are Na- and Na-Ca amphiboles,whereas symplectitic amphiboles in the matrix
of the eclogites are Ca-amphiboles.White micas in T-II type amphibolites include both paragonite and phengite.
Journal Title
島根大学地球資源環境学研究報告
Volume
19
Start Page
135
End Page
150
ISSN
13439774
Published Date
2000-12-25
NCID
AA11455176
DOI(SelfDOI)
Publisher
島根大学総合理工学部地球資源環境学教室
Publisher Aalternative
Department of Geoscience, Interdisciplinary Faculty of Science and Engineering, Shimane University
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
OAI-PMH Set
Interdisciplinary Graduate School of Science and Engineering
Remark
12-14,16+ / 1993+
徳岡隆夫教授退官記念論誌集
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