四国西部,内子-小田地域の御荷鉾緑色岩類の地質構造

概要

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Geological structures of the Mikabu greenstones were studied in the Uchiko-Oda Area in WestShikoku. Greenstones near Mt. Takamori, to the east of Ikazaki, consist of basaltic tuff breccia, tuff andgabbro. They continue eastward, through Umezu, to the widely distributed Mikabu greenstones nearMt. Rohgajo and Mimido. Therefore, the greenstones near Mt. Takamori and Umezu can be correlativewith the Mikabu greenstones. The Mikabu greenstones of the Uchiko-Oda Area are intercalated in theJurassic accretionary complex as a sheet-like unit, and are folded by the Utsumukiyama and Odagawaantiforms. The Mikabu greenstones should be included in the northern Chichibu Terrain in the sight ofgeological structures. The Kiyomizu Tectonic Line, which runs along the northern margin of theMikabu greenstones, is probably a large fault, dividing the Sanbagawa Terrain from the NorthernChichibu Terrain.
徳島大学の論文