活断層研究
Online ISSN : 2186-5337
Print ISSN : 0918-1024
ISSN-L : 0918-1024
新潟平野東縁部における新たな活断層の認定
谷口 薫吾妻 崇
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ジャーナル フリー

1998 年 1998 巻 17 号 p. 65-71

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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.

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