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Onshore-offshore seismic transect from the eastern Nankai Trough to central Japan crossing a zone of the Tokai slow slip event

Earth, Planets and Space volume 57, pages943–959(2005)Cite this article

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Abstract

In the summer of 2001, an onshore-offshore integrated seismic survey was carried out along a 485 km long profile crossing the eastern Nankai Trough and central Japan from the western edge of the Izu island arc. Seismic velocity and reflectivity images showongoing subduction of repeated ridges. Two ridges are clearly resolved, the Paleo Zenisu-south ridge and -north ridge located between the Nankai Trough and central Japan. The two subducting ridges are 12 km thick by 40 km wide, and 20 km thick by 60 km wide, respectively. We propose that the north ridge may have prevented the eastward propagation of co-seismic slip during the 1944 earthquake due to strong coupling. Highly reflective subducting oceanic crust is imaged at 25–45 km depth beneath central Japan, and has a 2 km high dome structure at 30–40 km depth, indicating an even deeper ridge structure. This highly reflective subducted oceanic crust overlaps with the high Poisson’s ratio zone imaged in a seismic tomography study. From these relations, we propose that the Tokai silent slip can be attributed to a high pore pressure zone, which significantly extends the conditionally stable region at the top of the subducted crust.

References

  1. ANCORP Working Group, Seismic imaging of a convergent continental margin and plateau in the central Andes (Andean Continental Research Project 1996 (ANCORP’96)), J. Geophys. Res., 108, 2328, doi:10.1029/2002JB001771, 2003.

  2. Ando, M., Source mechanisms and tectonic significance of historical earthquakes along the Nankai Trough, Tectonophysics, 27, 119–140, 1975.

  3. Aoki, Y., T. Tomono, and S. Kato, Detailed structure of the Nankai trough from migrated seismic sections, in Continental Margin Geology, edited by J. S. Watkins and C. L. Drake, Am. Assoc. Pet. Geol. Mem., 34, 309–322, 1982.

  4. Baba, T., Y. Tanioka, P. R. Cummins, and K. Uhira, The slip distribution of the 1946 Nankaido earthquake estimated from tsunami inversion using a newplate model, Phys. Earth Planet. Interior., 132, 59–74, 2002.

  5. Baba, T., P. R. Cummins, T. Hori, and Y. Kaneda, The influence of plate boundary topography on interpolate earthquakes: Slip distributions of the 1944 Tonankai and 1946 Nankai earthquakes deduced from tsunami waveforms, Tectonophysics, in press.

  6. Brocher, T. M., T. Parsons, A. M. Trehu, C. M. Snelson, and M. A. Fishre, Seismic evidence for widespread serpentinized forearc upper mantle along the Cascadia margin, Geology, 31(3), 267–270, 2003.

  7. Christensen, N. I. and W. D. Mooney, Seismic velocity structure and composition of the continental crust: A global view, J. Geophys. Res., 100, 9761–9788, 1995.

  8. Cummins, P. R., T. Baba, S. Kodaira, and Y. Kaneda, The 1946 Nankai earthquake and segmentation of the Nankai Trough, Phys. Earth Planet. Interior, 132, 75–87, 2002.

  9. Dessa, J.-X., S. Operto, S. Kodaira, A. Nakanishi, G. Pascal, K. Uhira, and Y. Kaneda, Deep seismic imaging of the eastern Nankai trough, Japan, from multifold OBS data by combined traveltime tomography and prestack depth migration, J. Geophys. Res., 109, 10.1029/2003JB002689, 2004.

  10. Gerdom, M., A. M. Trehu, E. R. Flueh, and D. Klaeschen, The continental margin off Oregon from seismic investigations, Tectonophysics, 329, 79–97, 2001.

  11. Hacker, B. R., G. A. Abers, and S. M. Peacock, Subduction factory 1. Theoretical mineralogy, densities, seismic wave speeds, and H2O contents, J. Geophys. Res., 108, 2029, doi:1029/2001JB001127, 2003.

  12. Hearn, T. M. and J. F. Ni, Pn velocities beneath continental collision zones: The Turkishi-Iranian Plate, Geophys. J. Int., 117, 273–283, 1994.

  13. Heki, K. and S. Miyazaki, Plate convergence and long-term crustal deformation in central Japan, Geophys. Res. Lett., 28, 2313–2316, 2001.

  14. Holbrook, S. W., D. Lizarralde, S. McGeary, N. Bangs, and J. Diebold, Structure and composition of the Aleutian island arc and implications for continental crustal growth, Geology, 27, 31–34, 1999.

  15. Hole, J. A. and B. C. Zelt, 3-D finite-difference reflection travel times, Geophys. J. Int., 121, 427–434, 1995.

  16. Hyndman, R. D., Dipping seismic reflectors, electrically conductive zones, and trapping water in the crust over a subducting plate, J. Geophys. Res., 93, 13391–13405, 1988.

  17. Iidaka, T., T. Iwasaki, T. Takeda, T. Moriya, I. Kumuakawa, E. Kurashimo, T. Kawamura, F. Yamazaki, K. Koike, and G. Aoki, Configuration of subducting Philippine Sea plate and crustal structure in the central Japan region, Geophys. Res. Lett., 30, 1219, doi:10.1029/2002/GL016517, 2003.

  18. Ishibashi, K., Reconsideration of an expected great earthquake in the Tokai district; a possibility of the bay of Suruga earthquake, Japan seismological society abstract, 2, 30–34, 1976.

  19. Ishizuka, O., K. Uto, M. Yuasa, and A. G. Hochstaedter, K-Ar ages from seamount chains in the back-arc region of the Izu-Ogasawara arc, The Island Arc, 7, 408–421, 1998.

  20. Iwasaki, T., W. Kato, T. Moriya, A. Hasemi, N. Umino, T. Okada, K. Miyashita, T. Mizogami, T. Takeda, S. Sekine, T. Matsushima, K. Tashiro, and H. Miyamachi, Extensional structure in northern Honshu Arc as inferred from seismic refraction/wide-angle reflection profiling, Geophys. Res. Lett., 28, 2329–2332, 2001.

  21. Kamiya, S. and Y. Kobayashi, Detection of serpentinized wedge mantle beneath the Tokai district, Japan, abst 1997 Japan Earth and planetary science joint meeting, C21-04, 1997.

  22. Kamiya, S. and Y. Kobayashi, Seismological evidence for the existence of serpentinized wedge mantle, Geophys. Res. Lett., 27, 819–822, 2000.

  23. Kanazawa, T. and H. Shiobara, Newly developed ocean bottom seismometer, Prog. Abst. Japan Earth and Planetary Science Joint Meeting, 2, 240, 1994.

  24. Kanda, K., M. Takemura, and T. Usami, Inversion analysis of distribution of energey radiated from an earthquake fault based on the seimic intensity data, Zishin, 56, 39–58, 2003.

  25. Kikuchi, M., M. Yamanaka, and K. Yoshikawa, Source rupture process of the 1944 Tonankai earthquake and the 1945 Mikawa earthquake derived from low-gain seismograms, Earth Planets Space, 55, 159–172, 2003.

  26. Kinoshita, H. and N. Matsuda, Seismic structure and geomagnetic anomaly in the Nankai Trough related to subduction of the Philippine Sea plate, J. Geomag. Geoelectr., 41, 161–173, 1989.

  27. Kobayashi, K., S. Kasuga, and K. Okino, Shikoku Basin and its Margins, in Backarc Basins: Tectonics and Magmatism, pp. 381–405, edited by B. Taylor, Plenum Press, New York, 1995.

  28. Kodaira, S., N. Takahashi, J.-O. Park, K. Mochizuki, M. Shinohara, and S. Kimura, Western Nankai Trough seismogenic zone: Results from a wide-angle ocean bottom seismic survey, J. Geophys. Res., 105, 5887–5905, 2000a.

  29. Kodaira, S., N. Takahashi, A. Nakanishi, S. Miura, and Y. Kaneda, Subducted seamount imaged in the rupture zone of the 1946 Nankaido earthquake, Science, 289, 104–106, 2000b.

  30. Kodaira, S., E. Kurahimo, J.-O. Park, N. Takahashi, A. Nakanishi, S. Miura, T. Iwasaki, N. Hirata, K. Ito, and Y. Kaneda, Structural factors controlling the rupture process of a megathrust earthquake at the Nankai trough seismogenic zone, Geophys. J. Int., 149, 815–835, 2002.

  31. Kodaira, S., A. Nakanishi, J.-O. Park, A. Ito, T. Tsuru, and Y. Kaneda, Cyclic ridge subduction at an inter-plate locked zone off central Japan, Geophys. Res. Lett., 30, 1339, doi:10.1029/2002GL016595, 2003.

  32. Kodaira, S., T. Iidaka, A. Kato, J.-O. Park, T. Iwasaki, and Y. Kaneda, High pore fluid pressure may cause silent slip in the Nankai Trough, Science, 304, 1295–1298, 2004.

  33. Lallemand, S. E., J. Malavieille, and S. Calassou, Effects of oceanic ridge subduction on accretionary wedges: Experimental modeling and marine observations, Tectonics, 11, 1301–1321, 1992.

  34. Le Pichon, X., S. Lallemant, H. Tokuyama, E. Thoue, P. Huchon, and P. Henry, Structure and evolution of the backstop in the eastern Nankai trough area (Japan): Implications for the soon-to-come Tokai earthquake, The Island Arc, 5, 440–454, 1996.

  35. Mazzotti, S., X. Le Pichon, P. Henry, and S. Miyazaki, Full interseismic locking of the Nankai and Japan-west Kurile subduction zones; an analysis of uniform elastic strain accumulation in Japan constrained by permanent GPS, J. Geophys. Res., 105, 13159–13177, 2000.

  36. Mazzotti, S., S. Lallemant, P. Henry, X. Le Pichon, H. Tokuyama, and N. Takahashi, Intraplate shortening and underthrusting of a large basement ridge in the eastern Nankai subduction zone, Marine Geol., 187, 63–88, 2002.

  37. Miura, S., K. Suyehiro, M. Shinohara, N. Takahashi, E. Araki, and A. Taira, Seismological structure and implications of collision between the Ontong Java Plateau and Solomon Island Arc from ocean bottom seismometer-airgun data, Techtonophysics, 389, 191–220, 2004.

  38. Moore, G. F., T. H. Shipley, P. L. Stoffa, D. E. Karig, A. Taira, S. Kuramoto, H. Tokuyama, and K. Suyehiro, Structure of the Nankai Trough accretionary zone from multichannel seismic reflection data, J. Geophys. Res., 95, 8753–8765, 1990.

  39. Moser, T. J., Shortest path calculation of seismic rays, Geophysics, 56, 59–67, 1991.

  40. Nakamura, K., S. Uchida, and K. Shibata, Chemistry and K-Ar age of igneous rocks dredged at the Zenisu Ridge, Bull. Volcanological Soc. Japan, 32, 181, 1987.

  41. Nakanishi, A., H. Shiobara, R. Hino, S. Kodaira, T. Kanazawa, and H. Shimamura, Detailed subduction structure across the eastern Nankai Trough obtained from OBS profiles, J. Geophys. Res., 103, 27151–27168, 1998.

  42. Nakanishi, A., H. Shiobara, R. Hino, K. Mochizuki, T. Sato, J. Kasahara, N. Takahashi, K. Suyehiro, H. Tokuyama, J. Segawa, M. Shinohara, and H. Shimamura, Deep crustal structure of the eastern Nankai Trough and Zenisu Ridge by dense airgun—OBS seismic profiling, Marine Geol., 187, 47–62, 2002a.

  43. Nakanishi, A., N. Takahashi, J.-O. Park, S. Miura, S. Kodaira, Y. Kaneda, N. Hirata, T. Iwasaki, and M. Nakamura, Crustal structure across the coseismic rupture zone of the 1944 Tonankai earthquake, the central Nankai Trough seismogenic zone, J. Geophys. Res., 107, EPM2-1-2-21, 2002b.

  44. Nakanishi, A., S. Kodaira, J.-O. Park, and Y. Kaneda, Deformable backstop as seaward end of coseismic slip in the Nankai Trough seismogenic zone, Earth Planet. Sci. Lett., 203, 255–263, 2003.

  45. Nedimovic, M. R., R. D. Hyndman, K. Ramachandra, and G. D. Spence, Reflection signature of seismic and aseismic slip on the northern Cascadia subduction thrust, Nature, 424, 416–420, 2003.

  46. Nishisaka, H., M. Mochida, M. Shinohara, R. Hino, J. Kasahara, T. Sato, K. Mochizuki, H. Katao, K. Suyehiro, T. Kanazawa, T. Maeda, T. Iwasaki, N. Hirata, and T. Yoshii, Crustal structure of Nankai Trough, off Siono Cape and Kii-Suidou using ocean bottom seismometer and controlled sources, paper presented at Japan Earth and Planetary Science Joint Meeting, Seismol. Soc. Jpn., Tokyo, 1997.

  47. Nishizawa, A. and K. Suyehiro, Crustal structure of the Nankai Trough obtained by OBS data, Chikyu, 111, 645–650, 1989.

  48. Okino, K., Y. Ohara, S. Kasuga, and Y. Kato, The Philippine Sea: New survey results reveal the structure and the history of the marginal basins, Geophys. Res. Lett., 26, 2287–2290, 1999.

  49. Ozawa, S., M. Murakami, M. Kaidzu, T. Tada, T. Sagiya, Y. Hatanaka, H. Yari, and T. Nishimura, Detection and monitoring of ongoing aseismic slip in the Tokai region, central Japan, Science, 298, 1009–1012, 2002.

  50. Park, J.-O., T. Tsuru, S. Kodaira, P. R. Cummins, and Y. Kaneda, Splay fault branching along the Nankai subduction zone, Science, 297, 1157–1160, 2002.

  51. Park, J.-O., G. F. Moore, T. Tsuru, S. Kodaira, and Y. Kaneda, A subducted oceanic ridge influencing the Nankai megathrust earthquake rupture, Earth Planet. Sci. Lett., 217, 77–84, 2003.

  52. Preston, L. A., K. C. Creager, R. S. Crosson, T. M. Brocher, and A. M. Trehu, Intraslab earthquakes: Dehydration of the Cascadia slab, Science, 302, 1197–1200, 2003.

  53. Sakamoto, I. and Y. Kim, Petrographical characteristics of volcanic rocks sampled from Kosyu seamount, northern part of Shikoku basin, Bull. department of marine science, Tokai Univ., 48, 145–159, 1999.

  54. Sangawa, A., History of the earthquake obtained from ruins and soil liquefaction, Kagaku, 68, 20–24, 1998.

  55. Sagiya, T., Interplate coupling in the Tokai district, central Japan, deduced from continuous GPS data, Geophys. Res. Lett., 26, 2315–2318, 1999.

  56. Sato, H. et al., Seismic reflection image of lithospheric structure beneath Shitara, Tokai, central Japan. abst. Japan Earth and Planetary science Joint Meeting, S052-016, 2002.

  57. Scholz, C. H., Earthquakes and friction laws, Nature, 391, 37–42, 1998.

  58. Seno, T., S. Stein, and A. E. Gripp, A model for the motion of the Philippine Sea plate consistent with NUVEL-1 and geological data, J. Geophys. Res., 98, 17941–17948, 1993.

  59. Shinohara, M., K. Suyehiro, S. Matsuda, and K. Ozawa, Digital recording ocean bottom seismometer using portable digital audio tape recorder, Journal of the Japan Society for Marine Surveys and Technology, 5, 21–31, 1993.

  60. Shiono, S. and N. Sugi, Life of an oceanic plate: Cooling time and assimilation time, Tectonophysics, 112, 35–50, 1985.

  61. Sugi, N. and S. Uyeda, Subduction of young oceanic plates without deep focus earthquakes, Bull. Soc. Geol. France, 26, 245–254, 1984.

  62. Sugiyama, Y., Neotectonics of Southwest Japan due to the right-oblique subduction of the Philippine Sea Plate, Geofisica Inernacional, 33, 53–76, 1996.

  63. Suyehiro, K., N. Takahashi, Y. Ariie, Y. Yokoi, R. Hino, M. Shinohara, T. Kanazawa, N. Hirata, H. Tokuyama, and A. Taira, Continental crust, crustal underplating and low-Q upper mantle beneath an oceanic island arc, Science, 272, 390–392, 1996.

  64. Taira, A. et al., Proceedings of Ocean Drilling Program, Initial Reports, 131, Ocean Drilling Program, College Station, Texas, 1991.

  65. Takahashi, N., H. Amano, K. Hirata, H. Kinoshita, S. Lallemant, H. Tokuyama, F. Yamonomo, A. Taira, and K. Suyehiro, Faults configuration around the eastern Nankai trough deduced by multichannel seismic profiling, Marine Geol., 187, 31–46, 2002.

  66. Tanioka, Y. and K. Satake, Detailed coseismic slip distribution of the 1944 Tonankai earthquake estimated from tsunami wave forms, Geophys. Res. Lett., 28, 1075–1078, 2001a.

  67. Tanioka, Y. and K. Satake, Coseismic slip distribution of the 1946 Nankai earthquake and aseismic slips caused by the earthquake, Earth Planets Space, 53, 235–241, 2001b.

  68. Wells, R. R., R. J. Blakely, Y. Sugiyama, D. W. Scholl, and P. A. Dinterman, Basin-centerd asperities in great subduction zone earthquakes; a link between slip, subsidence and subduction erosion, J. Geophys. Res., 108(B10), 2507, doi:10.1029/2002JB002072, ESE 16-1 to 16-30, 2003.

  69. Yuasa, M., Sofugan tectonic line, a new tectonic boundary separating northern and southern parts of the Izu-Ogasawara (Bonin) arc, nothwest Pacific, in Formation of Active Ocean Margins, edited by N. Nasu, K. Kobayashi, S. Uyeda, I. Kushiro, and H. Kagami, pp. 483–486, Terra Scientific Publishing Company, Tokyo, 1985.

  70. Zelt, C. A. and P. J. Barton, 3D seismic refraction tomography: A comparison of two methods applied to data from the Faeroe Basin, J. Geophys. Res., 103, 7187–7210, 1998.

  71. Zelt, C. A., K. Sain, J. V. Naumenko, and D. S. Sawyer, Assessment of crustal velocity models using seismic refraction and reflection tomography, Geophys. J. Int., 153, 595–608, 2003.

  72. Zhang, U. and M. N. Toksöz, Nonlinear refraction travel time tomography, Geophysics, 63, 1726–1737, 1998.

  73. Zhang, J., U.-S. Brink, and M. N. Toksöz, Nonlinear refraction and reflection travel time tomography, J. Geophys. Res., 103, 29743–29757, 1998.

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Affiliations

  1. Institute for Research on Earth Evolution, Japan Agency Marine-Earth Science and Technology, Showa-mach 3173-25, Kanazawa-ku, Yokohama, 236-0001, Japan

    • Shuichi Kodaira
    • , Ayako Nakanishi
    • , Jin-Oh Park
    •  & Yoshiyuki Kaneda

  2. Earthquake Research Institute, University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, 113-0032, Japan

    • Takashi Iidaka
    •  & Takaya Iwasaki

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Correspondence to Shuichi Kodaira.

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Kodaira, S., Iidaka, T., Nakanishi, A. et al. Onshore-offshore seismic transect from the eastern Nankai Trough to central Japan crossing a zone of the Tokai slow slip event. Earth Planet Sp 57, 943–959 (2005) doi:10.1186/BF03351874

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Key words

  • Nankai Trough
  • seismic imaging
  • subduction zone
  • slowslip
  • earthquake