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  • 中村 洋介, 宮谷 淳史, 岡田 篤正
    活断層研究
    2006年 2006 巻 26 号 151-162
    発行日: 2006/06/30
    公開日: 2012/11/13
    ジャーナル フリー
    The Morimoto-Togashi fault is a reverse fault extending for 25km along the eastern margin of the Kanazawa Plain. The Morimoto-Togashi fault is characterized by fault scarps several meters high on late Quaternary fluvial terraces and the formative age of fluvial terraces were estimated by Nakamura et al (2003). We measured the vertical displacement of fluvial terraces across the Morimoto-Togashi fault and estimated the distributions of vertical average slip rates. Vertical average slip rates for the Morimoto-Togasi fault are 0.13-0.35 mm/yr (northern part), are 0.05-0.70 mm/yr (central part), and are 0.24-0.40 mm/yr (southern part), respectively. This implies that the peak of vertical average slip rate exist the Kanazawa City area and the Morimoto-Togasi fault does not move with the Sekidosann fault.
  • 東郷 正美, 池田 安隆, 今泉 俊文, 澤 祥, 平野 信一
    活断層研究
    1998年 1998 巻 17 号 72-83
    発行日: 1998/12/29
    公開日: 2013/03/22
    ジャーナル フリー
    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.
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