Special Issue: Slip and Flow Processes in and below the Seismogenic Region
Tectonic evolution and deep to shallow geometry of Nagamachi-Rifu Active Fault System, NE Japan
Earth, Planets and Space volume 54, pages 1039–1043 (2002)
The Nagamachi-Rifu fault is an active reverse fault which trends NE-SW across the central part of Sendai City for over 21 km distance. The fault does not emerge at the surface and, accompanied with the Dainenji-yama fault, shows wedge thrusting in the Tertiary sediments. The amount of net slip of the master part of the Nagamachi-Rifu fault is estimated to be one mm/year. Seismic reflection profiles across the fault plus a gravity anomaly reveal the thicker Neogene sediments on the hanging wall rather than on the footwall. The Neogene sedimentary basin was formed by normal faulting in early Miocene under an extensional stress regime associated with the formation of the northern Honshu rift system. Due to shortening deformation since the Pliocene, this Miocene normal fault reactivated as a reverse fault. Judging from the CMP deep seismic reflection profile and location of the 1998 M5.0 Sendai earthquake, the deep geometry of the Nagamachi-Rifu fault is listric.
Amano, K., Geology of the Ou Backbone Ranges in Miyagi and Yamagata Prefectures, Northeast Honshu Japan, Contrib. Inst. Geol. Paleontol. Tohoku Univ., 81, 1–56, 1980 (in Japanese with English abstract).
Hasegawa, A., N. Umino, and S. Hori, Seismic activity and inhomogeneous structure of the crust around the Nagamachi-Rifu fault, Earth Monthly, 23, 313–320, 2001 (in Japanese).
Hiroshima, T., M. Komazawa, M. Okuma, T. Nakatsuka, M. Mishina, and K. Okamoto, Gravity (Bouger) anomaly map of Yamagata district, Gravity Map Series 3, 1:200,000, Geological Survey of Japan, 1991.
Ikawa, T., T. Kawanaka, S. Kawasaki, A. Hasegawa, N. Umino, A. Nakamura, H. Ito, T. Iwasaki, and H. Sato, Seismic reflection survey of the deep structure of Nagamachi-Rifu fault, Northeast Japan, Proceedings of the International Symposium on Slip and Flow processes in and below the Seismogenic Region, Sendai, Japan, pp. 301–308, 2001.
Imaizumi, T., S. Sawa, H. Sato, S. Hirano, M. Watanabe, and H. Yagi, Active fault system in Sendai and Fukushima area, in Atlas of Quaternary Thrust Faults in Japan, edited by Y. Ikeda et al., pp. 100–111, Univ. of Tokyo Press, Tokyo, 2002.
Kitamura, N. (Ed.), Cenozoic Arc Terrane of Northeast Honshu, Japan, 3 vols., Hobundo, Sendai, Japan, 1986 (in Japanese).
Kitamura, N., T. Ishii, A. Sangawa, and H. Nakagawa, Geology of the Sendai district, with Geological Sheet Map at 1:50,000, Geol. Surv. Japan, 134 pp., 1986 (in Japanese with English abstract).
Miyagi Prefectural Government, Research on the Nagamachi-Rifu fault, Abstract for the Results of active fault research supported by Headquarters for Earthquake Research Promotion, No. 1. The Science and Technology Agency, Japan, 30–34, 1997 (in Japanese).
Miyagi Prefectural Government, Research on the Nagamachi-Rifu fault, Abstract for the Results of active fault research supported by Headquarters for Earthquake Research Promotion, No. 2. The Science and Technology Agency, Japan, 29–34, 2000 (in Japanese).
Nakamura, K., Inversion tectonics and its structural expression, J. Tectonic Res. Group Japan., 38, 3–45, 1992 (in Japanese with English abstract).
Nakata, T., K. Otsuki, and T. Imaizumi, Quaternary crustal movement along the Nagamachi-Rifu dislocation line in the vicinity of Sendai, northeast Japan, Annals. Tohoku Geographical Association, 28, 111–120, 1976 (in Japanese with English abstract).
Okada, T., N. Umino, T. Matsuzawa, A. Hasegawa, and M. Kamiyama, Source processes of 15 September 1998 M 5.0 Sendai, northeastern Japan, earthquake and its M 3.8 foreshock by waveform inversion, Bull. Seismol. Soc. Am., 91, 1607–1618, 2001.
Okamura, Y., M. Watanabe, E. Morijiri, and M. Satoh, Rifting and basin inversion in the eastern margin of the Japan Sea, Island Arc, 4, 166–181, 1995.
Otsuki, K., T. Nakata, and T. Imaizumi, Quaternary crustal movements and block model in the southeastern region of the northeast Japan, Earth Science (Chikyu-Kagaku), 31, 1–14, 1977 (in Japanese with English abstract).
Sato, H., The relationship between late Cenozoic tectonic events and stress field and basin development in northeast Japan, J. Geophys. Res., 99, 22261–22274, 1994.
Umino, N., T. Okada, T. Matsuzawa, S. Hori, T. Kono, K. Nida, A. Hasegawa, and N. Nishide, On M5.0 earthquake that occurred at the deepest portion of Nagamachi-Rifu fault on September 15, 1998, Earth Monthly special issue, 27, 148–154, 1999 (in Japanese).
Yoshida, T., The evolution of arc magmatism in the NE Honshu arc, Japan, Tohoku Geophysical Journal, 36, 131–149, 2001.
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Sato, H., Imaizumi, T., Yoshida, T. et al. Tectonic evolution and deep to shallow geometry of Nagamachi-Rifu Active Fault System, NE Japan. Earth Planet Sp 54, 1039–1043 (2002). https://doi.org/10.1186/BF03353298
- Hanging Wall
- Bouguer Anomaly
- Seismic Line