このエントリーをはてなブックマークに追加
ID 13938
Eprint ID
13938
フルテキストURL
Thumnail ESR_2_1.pdf 740 KB
著者
野坂 俊夫 Department of Earth Sciences, Faculty of Science Okayama University
柴田 次夫 Department of Earth Sciences, Faculty of Science Okayama University
抄録
The Ohsa-yama ultramafic body, which consists of several types of serpentinized peridotites, underwent contact metamorphism caused by a Cretaceous granite intrusion ; this metamorphism resulted in the formation of contact aureole, 1.5-2.0 km wide, around the granite intrusion, and produced progressive mineral changes in metaserpentinites toward the contact between the Ohsa-yama body and the granite intrusion. On the basis of analysis of mineral paragenetic relations, the Ohsa-yama ultramafic body can be divided into three zones with progressive changes in mineral assemblages as follows : Zone Ⅰ : serpentine ± chlorite ± brucite Zone Ⅱ : olivine + talc ± tremolite ± chlorite Zone Ⅲ : olivine + orthopyroxene ± tremolite ± spinel Zone Ⅰ corresponds to the parts unaffected by the thermal event, and Zones Ⅱ and Ⅲ correspond to the thermally metamorphosed parts of the Ohsa-yama body. The results obtained in this study are generally consistent with those of the previous studies on metamorphic peridotites from the Sangun and Muzuru zones.
キーワード
peridotite
serpentinite
thermal metamorphism
contact metamorphism
発行日
1995-09-20
出版物タイトル
Okayama University Earth Science Report
出版物タイトル(別表記)
岡山大学地球科学研究報告
2巻
1号
出版者
岡山大学理学部地球科学教室
出版者(別表記)
Department of Earth Sciences Faculty of Science, Okayama University
開始ページ
1
終了ページ
12
ISSN
1340-7414
NCID
AN10506284
資料タイプ
紀要論文
言語
English
著作権者
岡山大学地球科学研究報告編集委員会
論文のバージョン
publisher
査読
無し
Eprints Journal Name
esr