Significance of pelitic schist found from the Nakanotake metagabbroic mass, Katashina Belt, central Japan

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概要

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• The Nakanotake metagabbroic mass had been considered to be a massive rock body whose interior structure had not been affected by tectonic events. Our study, however, found three schist layers which had undergone remarkable ductile shear deformation from the Nakanotake metagabbroic mass. This fact implies that the Nakanotake metagabbroic mass is made of piling tectonic slices bounded by some schist layers as a ductile shear zone. The pelitic schist layers appear to be conjunctive zones, resulted from a concentration of tectonic strain of piling tectonic slices, because minor deformed structures such as intrafolial and sheath folds developed only in the pelitic schist. In the Katashina Belt, the piling tectonic slice structure has not been found, but the discovery of such a structure would suggest that the Katashina Belt may consist of some piling tectonic slices thrust over the Ashio Belt.

• 地学団体研究会の論文
• 2002-09-25

著者

• Takenouchi Ko

  Niigata Branch Fossa Magna Museum

• OHKOUCHI Makoto

  Niigata branch, Graduate school of Science and Technology, Niigata University

• UDA Tsuyoshi

  Niigata branch, Institute of Natural Environmental Sciences, Faculty of Science, Niigata University

• OKUDA Eiji

  Tokyo branch, IDOWR Engeneering Co. Ltd.

• Ohkouchi Makoto

  Niigata Branch Graduate School Of Science And Technology Niigata University

• Okuda Eiji

  Tokyo Branch Idowr Engeneering Co. Ltd.

• Uda Tsuyoshi

  Niigata Branch Institute Of Natural Environmental Sciences Faculty Of Science Niigata University

関連論文

• Significance of pelitic schist found from the Nakanotake metagabbroic mass, Katashina Belt, central Japan

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