- Open Access
Seismological and geological characterization of the crust in the southern part of northern Fossa Magna, central Japan
Earth, Planets and Space volume 56, pages1253–1259(2004)
The northern Fossa Magna (NMF) is a Miocene rift basin formed in the final stages of the opening of the Sea of Japan. The northern part of Itoigawa-Shizuoka Tectonic Line (ISTL) bounds the western part of the NMF and forms an active fault system that displays one of the largest slip rates in the Japanese islands. Reflection and refraction/wide-angle reflection profiling and earthquake observations by a dense array were undertaken across the northern part of ISTL in order to delineate structures in the crust, and deep geometry of the active fault systems. The ISTL active fault system at depth (ca. 2 km) shows east-dipping low-angle in Omachi and Matsumoto and is extended beneath the Central Uplift Zone and Komoro basin keeping the same dip-angle down to ca. 15 km. The upper part of the crust beneath the Central Uplift Zone is marked by the high Vp and high resistivity zone. Beneath the folded zone of the NMF, the middle to lower crust shows low Vp, low resistivity and more reflective features. The balanced geologic cross-section based on the reflection profiles suggests that the shortening deformation since the late Neogene was produced by the basin inversion of the Miocene low-angle normal fault.
Abe, S., E. Kurashimo, H. Sato, N. Hirata, and T. Kawanaka, Seismic migration of receiver functions for deep crustal structure across the Itoigawa-Shizuoka tectonic line with dense broad-band seismic arrays, Proceedings of the 2nd International Symposium on Slip and Flow Process in and below the Seismogenic Region, Tokyo, Japan, 2004.
Arai, Y., The late Cenozoic tectonics of the northern Fossa Magna, Master thesis, Graduate School of Science, The Univ. of Tokyo, Tokyo, 182 pp., 2000.
Asano, S., K. Ichikawa, H. Okada, S. Kubota, H. Suzuki, M. Nogoshi, H. Watanabe, K. Seya, K. Noritomi, and K. Tazime, Explosion seismic observations in the Matsushiro Earthquake Swarm Area, Spec. Rep. Geol. Survey of Japan, 5, Part I, 1–162, 1969.
Elouai, D., H. Sato, N. Hirata, S. Kawasaki, T. Takeshita, N. Kato, and T. Takeda, Deep seismic reflection profiling across the northern Fossa Magna: The ERI 1997 and the JNOC 1996 seismic lines, active faults and geological structures, Earth Planets Space, 56, this issue, 1333–1340, 2004.
Geological Survey of Japan (eds.), 1:1,000,000 Geological Map of Japan (3rd ed.), Geological Survey Japan, Tsukuba, 1992.
Hiroshima, T., M. Komazawa, and T. Nakatsuka, Gravity Map of Joshinetsu District (Bouguer Anormalies) 1:200000, Geological Survey of Japan, 1994.
Ikami, A., T. Yoshii, S. Kubota, Y. Sasaki, A. Hasemi, T. Moriya, H. Miyamachi, R. Matsu’ura, and K. Wada, A seismic refraction profile in and around Nagano Prefecture, Central Japan, J. Phys. Earth, 34, 457–474, 1986.
Ikeda, Y., T. Imaizumi, M. Togo, K. Hirakawa, T. Miyauchi, and H. Sato (eds.), Atlas of Quaternary Thrust Faults in Japan, Univ. of Tokyo Press, Tokyo, 254 pp., 2002 (in Japanese).
Ikeda, Y., T. Iwasaki, H. Sato, N. Matsuta, and T. Kozawa, Seismic reflection profiling across the Itoigawa-Shizuoka Tectonic Line at Matsumoto, Central Japan, Earth Planets Space, 56, this issue, 1317–1323, 2004.
Imai, T., T. Iwasaki, T. Takeda, T. Kawanaka, and H. Sato, Detailed upper crustal structure across the Itoigawa-Shizuoka Tectonic Line from the 2002 seismic expedition, Abstracts 2004 Japan Earth and Planetary Science Joint Meeting, S075–005, 2004.
Iwasaki, T., Ray-tracing program for study of velocity structure by ocean bottom seismographic profiling, Zisin (J. Seismol. Soc. Japan), 41, 263–266, 1988 (in Japanese).
Kano, K., K. Kosaka, M. Murata, and S. Yanai, Intra-arc deformation with the vertical rotation axes: The case of the pre-Middle Miocene terranes of Southwest Japan, Tectonophysics, 176, 333–354, 1990.
Kato, H., Geology of the Sakaki District, Quardrangle Series, Scale 1:50000, Geol. Surv. Japan, 57 pp., 1980 (in Japanese with English Abstract).
Kato, H., Fossa Magna—A masked border region separating southwest and northeast Japan, Bull. Geol. Surv. Japan, 43, 1–30, 1992.
Kato, H. and S. Akabane, Geology of the Nagano District. Quardrangle Series, Scale 1:50000, Geol. Surv. Japan, 122 pp., 1986 (in Japanese with English Abstract).
Kato, H. and T. Sato, Geology of the Shinanoikeda District. Quardrangle Series, Scale 1:50000, Geol. Surv. Japan, 93 pp., 1983 (in Japanese with English Abstract).
Kato, H., K. Mimura, T. Sato, and F. Takizawa, Geology of the Omachi District Quardrangle Series, Scale 1:50000, Geol. Surv. Japan, 111 pp., 1989 (in Japanese with English Abstract).
Kosuga, M., Stress regime of the NE Japan deduced from crustal earthquakes, Earth Monthly, 27, 107–112, 1999 (in Japanese).
Kurashimo, E. and N. Hirata, Low Vp and Vp/Vs zone beneath the northern Fossa Magna basin, central Japan, derived from a dense array observation, Earth Planets Space, 56, this issue, 1303–1310, 2004.
Matsuta, N., Y. Ikeda, T. Imaizumi, and H. Sato, Subsurface structure of and rate of net slip on the Kamishiro fault, northern part of the Itoigawa-Shizuoka Tectonic Line, central Japan, Active Fault Research, 20, 59–70, 2001 (in Japanese with English Abstract).
Matsuta, N., Y. Ikeda, and H. Sato, The slip rate along the northern Itoigawa-Shizuoka tectonic line active fault system, central Japan, Earth Planets Space, 56, this issue, 1325–1332, 2004.
Nakamura, K., Possibility of a nascent plate boundary at the eastern margin of the Japan Sea, Bull. Earthquake Res. Inst., Univ. Tokyo, 58, 711–722, 1983 (in Japanese).
Ogawa, Y., M. Mishina, T. Goto, H. Satoh, N. Oshiman, T. Kasaya, Y. Takahashi, T. Nisitani, S. Sakanaka, M. Uyeshima, Y. Takahashi, Y. Honkura, and M. Matsushima, Magnetotelluric imaging of fluidsin intraplate earthquakes zones, NE Japan back arc, Geophysical Research Letters, 28, 3741–3744, 2001.
Ogawa, Y., S. Takakura, and Y. Honkura, Resistivity structure across Itoigawa-Shizuoka tectonic line and its implications for concentrated deformation, Earth Planets Space, 54, 1115–1120, 2002.
Okumura, K., Paleoseismology of the Itoigawa-Shizuoka tectonic line in central Japan, Jour. Seismol., 5, 411–431, 2001.
Otsuki, K., Geology of the Tanakura Sear Zone and adjacent area, Contrib. Inst. Geol. Paleontol. Tohoku Univ., 76, 1–75, 1975 (Japanese with English abstract).
Sagiya, T., T. Nishimura, Y. Iio, and T. Tada, Crustal deformation around the northern and central Itoigawa-Shizuoka Tectonic Line, Earth Planets Space, 54, 1059–1063, 2002.
Sakai, S., Seismicity of the northern part of Itoigawa-Shizuoka Tectonic Line, Proceedings of the 2nd International Symposium on Slip and Flow Process in and below the Seismogenic Region, Tokyo, Japan, 2004.
Sakai, S., T. Iwasaki, T. Iidaka, T. Yoshii, F. Yamazaki, and T. Kuwayama, The structure of the crust of Chubu region from the explosion observation, Earth Monthly, 18, 104–108, 1996 (in Japanese).
Sato, H. and Y. Ikeda, Major fault systems in northern Honshu, Japan, Earth Monthly, 21, 569–575, 1999 (in Japanese).
Sato, H., T. Iwasaki, S. Kawasaki, Y. Ikeda, N. Matsuta, T. Takeda, N. Hirata, and T. Kawanaka, Formation and shortening deformation of a back-arc rift basin revealed by deep seismic profiling, central Japan, Tectonophysics, 388, 47–58, 2004a.
Sato, H., T. Yoshida, T. Iwasaki, T. Sato, Y. Ikeda, and N. Umino, Late Cenozoic tectonic development of the back arc region of central northern Honshu, Japan, revealed by recent deep seismic profiling, J. Jpn. Assoc. Petrol. Tech., 69, 145–154, 2004b (in Japanese with English abstract).
Takeda, T., Detailed crustul structure in central Japan as revealed from reanalysis of wide-angle data, Master thesis, Graduate School of Science, The Univ. of Tokyo, 26 pp., 1997 (in Japanese).
Takeda, T., H. Sato, T. Iwasaki, N. Matsuta, S. Sakai, T. Iidaka, and A. Kato, Crustal structure in the northern Fossa Magna region, central Japan, modeled from refraction/wide-angle reflection data, Earth Planets Space, 56, this issue, 1295–1301, 2004.
Togo, M., Y. Ikeda, T. Imaizumi, and H. Sato, Fault morphology of both ends of the Kamishiro fault along the Itoigawa-Shizuoka Tectonic Line, central Japan, Active Fault Res., 15, 9–16, 1996 (in Japanese with English abstract).
Yoshimoto, K., H. Fujisawa, T. Okada, N. Umino, A. Hasegawa, K. Obara, K. Shiomi, H. Tsukahara, S. Okamoto, T. Kawanaka, Hiroshi Sato, T. Nishimura, Haruo Sato, and M. Ohtake, Moho and Philippine Sea plate structure beneath central Honshu island, Japan, from teleseismic receiver functions, Earth Planets Space, 56, this issue, 1273–1279, 2004a.
About this article
Cite this article
Sato, H., Iwasaki, T., Ikeda, Y. et al. Seismological and geological characterization of the crust in the southern part of northern Fossa Magna, central Japan. Earth Planet Sp 56, 1253–1259 (2004). https://doi.org/10.1186/BF03353348
- Crustal structure
- geologic structure
- active fault
- Itoigawa-Shizuoka tectonic line
- northern Fossa Magna
- seismic reflection profile
- seismic refraction profile
- central Japan