ID 74538
Title Transcription
シコク チュウオウブ ニシイシハラ 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 Nishi-ishihara Area,Central Shikoku
Author
Murata, Akihiro Institute of Socio-Arts and Sciences, University of Tokushima Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Maekawa, Hirokazu Department of Physical Science, Graduate School of Science, Osaka Prefectural University
Keywords
Mikabu greenstones
Nishi-ishihara thrust
Kamiyakawa-Ikegawa Tectonic Line
Kamiyakawa-Ikegawa antiform
geological structures
Sanbagawa metamorphism
Shikoku
Northern Chichibu Terrain
Content Type
Departmental Bulletin Paper
Description
Geological structures of the Mikabu greenstones and northern margin of the Chichibu
Terrain are studied in the Nishi-ishihara Area, Central Shikoku. The Mikabu greenstones are not
considered to occur in the area between Nishi-ishihara and Kamiyakawa in Central Shikoku,
because of the existence of the Nishi-ishihara thrust. This study, however, clarified that the
Mikabu greenstones composed of tuff and tuff breccia occur in a narrow zone there. Therefore,
the Mikabu greenstones are considered to expose continuously from Nishi-ishihara to west of
Kamidoi.
The Mikabu greenstones are intercalated in the Jurassic accretionary complex, and form an
antiform. The antiform of the Nishi-ishihara area can be traced to the Nanokawa area in Middle
West Shikoku, and also affects the Mikabu greenstones near Mt. Zohshi-yama. Jurassic
complex under the Mikabu greenstones lies in the axial part of the antiform. The complexes of
the northern and southern limbs have the same lithologic characters with each other. The
Kamiyakawa-Ikegawa Tectonic Line, which runs along the antiformal hinge, is not a fault
separating the Sanbagawa Metamorphic Terrain from the Northern 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
23
Issue
3
Start Page
73
End Page
81
Sort Key
73
Published Date
2009
FullText File
language
jpn
departments
Science and Technology