ID 74533
Title Transcription
シコク チュウオウブ セイブ カミドイ チイキ ト オダ チイキ ニオケル ミカブ リョクショク ガンルイ ノ チシツ コウゾウ
Title Alternative
Geological structures of the Mikabu greenstones of the Kamidoi and Oda Areas, Central to West Shikoku
Author
Murata, Akihiro Institute of Socio-Arts and Sciences, University of Tokushima Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Inufusa, Yoichi Earth Environmental Service Co. , Ltd.
Maekawa, Hirokazu Department of Physical Science, Graduate School of Science,Osaka Prefectural University
Keywords
Mikabu greenstones
Ikegawa thrust
Kamiyakawa-Ikegawa antiform
Odagawa antiform
geological structures
Kamidoi
Oda
Shikoku
Northern Chichibu Terrain
Content Type
Departmental Bulletin Paper
Description
Geological structures of the Mikabu greenstones and northern margin of the Chichibu Terrain were studied in the Kamidoi and Oda Areas in Central to West Shikoku. It has been thought that the Mikabu greenstones did not occur in the Kamidoi and Nishi-ishihara Areas in Central Shikoku, because of the existence of the Nishi-ishihara and Ikegawa thrusts. This study, however, clarified that the Mikabu greenstones composed of tuff and tuff breccia occur in a narrow zone there. The Mikabu greenstones are intercalated in the Jurassic accretionary complex as a layered unit, and are folded by the Kamiyakawa-Ikegawa antiform. The Mikabu greenstones of the Oda Area are also intercalated in the Jurassic complex and form the Odagawa antiform, which is the same as the Kamiyakawa-Ikegawa antiform. There is no large thrusts along the southern margin of the Mikabu greenstones. The Jurassic complexes under the Mikabu greenstones of the Kamidoi and Oda Areas have undergone the pumpellyite-actinolite facies metamorphism, like as the Mikabu greenstones and the overlying Jurassic complex. The Kiyomizu Tectonic Line, which runs along the northern margin of the Mikabu greenstones, is probably a large fault, dividing the Sanbagawa Terrain from the Mikabu greenstones and the Nortner Chichibu Terrain.
Journal Title
徳島大学総合科学部自然科学研究 = Natural Science Research, The University of Tokushima
ISSN
09146385
NCID
AN10065859
Volume
24
Issue
4
Start Page
55
End Page
64
Sort Key
55
Published Date
2010
EDB ID
FullText File
language
jpn
departments
Science and Technology