Identification of active faults in the eastern margin area of Niigata plain, central Japan.

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概要

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• The eastern margin of Niigata plain is tectonically active region. However, east of Shibata City no active fault zone has been mapped. Interpretation of large-scale airphotos and geomorphological observation reveal that several traces of active faults run in the study area. These faults are ca.3.3km,3.3 km, and 4.3 km long. The topographic characteristics such as fault scarplet and flexure scarp suggest that there faults are reverse. The progressive deformation is also clear at several sites. As a result, Kajigawa fault zone has been active during the late Quaternary. Average vertical slip rate of Nagaminehara fault is 0.06-0.1 mm / yr., Shimotaya fault is 0.14 mm yr., Kamihazu fault is 0.12-0.15mm / yr.

• Japanese Society for Active Fault Studiesの論文

著者

• 谷口 薫

  広島大学大学院文学研究科地理学教室

• 吾妻 崇

  地質調査所

• 谷口 薫

  広島大学大学院

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• 富士見西方のテクトニックバルジの構造を示す大露頭の紹介
• Identification of active faults in the eastern margin area of Niigata plain, central Japan.

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