Japan Geoscience Union Meeting 2015

Presentation information


Symbol S (Solid Earth Sciences) » S-GL Geology

[S-GL40] Regional geology and tectonics

Wed. May 27, 2015 6:15 PM - 7:30 PM Convention Hall (2F)

Convener:*Takeshi Yamagata(Department of Natural Sciences, Komazawa university), Makoto Otsubo(National Institute of Advanced Industrial Science and Technology (AIST), Institute of Earthquake and Volcano Geology)

6:15 PM - 7:30 PM

[SGL40-P07] Paleostress study with the muitiple inverse method using fault-slip data from southern end of Miura peninsula

*Fumitake KUSUHARA1, Hidemi TANAKA1 (1.The University of Tokyo)

Kenzaki anticline, which is ~8km along with a E-W trend, is located at the south end of Miura peninsula, Kanagawa prefecture. Around Kenzaki anticline, some researches on paleostress have been done using the conjugate fault method (Kodama, 1968; Kuniyasu, 1980). However, new methods which solved the theoretical problems of the conjugate fault method have not been applied to Kenzaki anticline area. In this study, the multiple inverse method(Yamaji, 1999) is applied to the fault-slip data from limbs of Kenzaki anticline and some paleostresses are detected. The order of these paleostresses and its relation to the formation of Kenzaki anticline are considered from the result of this method and cross cutting relation among observed faults.