Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Tateishi, Ryo*; Shimada, Koji; Iwamori, Akiyuki*; Wada, Shinya*; Seno, Shotaro*; Nagata, Ken*
Chishitsugaku Zasshi (Internet), 128(1), p.63 - 64, 2022/04
The Tsuruga Fault is an active right-lateral strike-slip fault that is about 20 km in length and distributed in the northeast-southwest direction from the eastern part of Tsuruga City to the southern part of Mihama Town, Fukui Prefecture. The Tsuruga fault borders the Jurassic accretionary complex (mixed rock) and the late Cretaceous granite around the Oritodani area in the Shinjo district of Mihama-cho. Lateral bendings of valleys along the fault in this area are clear geomorphological signatures of fault activity. We briefly report newly found multiple fault outcrops at these bending points with photos of them. This research is the result of joint research by Kansai Electric Power Company, University of Toyama, and JAEA.
Seno, Shotaro*; Tateishi, Ryo*; Shimada, Koji; Iwamori, Akiyuki*; Ogawa, Masaya*
no journal, ,
Several new outcrops of the Tsuruga Fault were discovered through field surveys near the fault distribution location using topographical interpretation using 1mDEM. In one outcrop, a layer of gravel is wrapped around a fractured zone of basement rock. From these sediments the K-Ah and the AT were detected through tephra analysis of fine grained portions. From the horizontal spread of the gravel layer at this outcrop and the attitude of the fault line, we determined the lower limit of the sum of multiple displacements for the horizontal component, diagonal slip component, and vertical component. The lower limit of the average displacement rate was calculated by dividing each component by the age of K-Ah. The results revealed that the vertical component is approximately 0.7m per 1000 years, the horizontal component is approximately 1.4m per 1000 years, and the diagonal component is approximately 1.5m per 1000 years.
