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タイトルヨミ
セイナン ニホン オカヤマケン ヤナハラ チイキ ホクトウブ ノ ペルムケイ マイヅル ソウグン ト ヤクノ オフィオライト
タイトル別表記
Permian Maizuru Group and Yakuno Ophiolitic Rocks in the Northeastern Part of Yanahara Area in Okayama Prefecture, Southwest Japan
ファイル
言語
英語
著者
徳岡 隆夫
渡辺 暉夫
Landis, Charles,A.
Pillai, D.Dhana.L.
西村 貢一
Choi, Jung,Yill
内容記述(抄録等)
A Permian convergent margin rock suite is discussed on the basis of the results of precise mappmg at the junction area of the Maizuru and the Kozuki-Tatsuno Belts. Middle to Late Permian radiolarians have been discovered from both the Kozuki unit (argillite-meta volcanicsbeded chert) and the Maizuru Group (predominantly mudstones). The newly proposed Tonoshiki Formation is composed of sedimentary breccias interpreted as being derived mostly from the Yakuno Ophiolitic rocks. Lower Permian radiolarians have been discovered from mudstone intercalated in the Tonoshiki breccias. The fomation is regarded to have been deposited on the ophiolite. The Yakuno Ophiolitic rocks together with the Tonoshiki Formation may have constituted a volcanic arc system, separating the Maizuru and Kozuki basins in Middle Permian time. The Tonoshiki Formation can be compared with the Upper Permian Upukerora Formation of the Maitai Group from the South Island of New Zealand, which was derived predominantly from the underlying Dun Mountain Ophiolite.
掲載誌名
島根大学理学部紀要
21
開始ページ
189
終了ページ
208
ISSN
03879925
発行日
1987-12-25
NCID
AN00108106
出版者
島根大学理学部
出版者別表記
The Faculty of Science, Shimane University
資料タイプ
紀要論文
部局
総合理工学部
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