Precise location and activity of active faults along the Morimoto-Togashi fault zone, Ishikawa prefecture, Hokuriku, Japan

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  • 森本-富樫断層帯の詳細位置と活動性について
  • モリモト トガシ ダンソウタイ ノ ショウサイ イチ ト カツドウセイ ニ ツイテ

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Description

Precise. aerial photograph interpretation of tectonic landforms in the eastern margin of the Kanazawa plain was made in order to clarify the overall nature of active faulting along the Morimoto-Togashi fault zone. This fault zone, about 25km long trending NNE, consists of east or southeast-dipping thrust faults, namely the Morimoto fault, the Nomachi fault, the Togashi fault, the Nagasaka fault, and the Nodayama fault. Vertical offset over 20m on a lower river terrace near Kanazawa city suggests that the overall rate of vertical slip on this fault zone is 1 m/kyr or more in the late Qauternary. The Morimoto, Nomachi, and Togashi faults, which constitute the main strands of this fault zone, have been active clearly in the Holocene; in paticular, the Morimoto fault has displaced an alluvial lowland surface formed after the Jomon. marine transgression of middle Holocene age. Such young offset features suggest that at least two faulting events have occurred since about 6000 years B. P.

Journal

  • Active Fault Research

    Active Fault Research 1998 (17), 72-83, 1998

    Japanese Society for Active Fault Studies

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