Skip to main content

Advertisement

P-wave velocity structure in the northern part of the central Japan Basin, Japan Sea with ocean bottom seismometers and airguns

Article metrics

  • 270 Accesses

  • 15 Citations

Abstract

In 1996, an airgun-ocean bottom seismometer survey was carried out in the northern part of the central Japan Basin. The crustal thickness in the central part is about 9 km, including a sedimentary layer with thickness of 1.5 km, and increases eastward. The obtained crustal structure is slightly different from those of typical ocean basins. The thickness and velocity of less than 6.5 km/s in the upper part of the crust do not correspond to that of a typical oceanic crust and the clear linear geomagnetic anomaly around this survey line has been unconfirmed. Although, this crust could be interpreted to be either anomalous thick oceanic crust formed at spreading centers influenced by a mantle plume or thinned continental crust at ocean-continental boundaries in passive margins, we prefer the latter as a conclusion, that is, it may be formed by thinning of a continental crust rather than by the melt of mantle plumes during the opening of the Japan Sea. In addition, the difference of the crustal structures in the study area and the northeastern Japan Basin where the crust is typical oceanic, indicates that the process of crustal formation may differ in the northern part of the central Japan Basin from in the northeastern Japan Basin.

References

  1. Červený, V., I. A. Molotkov, and I. Pšenčik, Ray Method in Seismology, 215 pp, Univerzita Karlova, Prague, 1977.

  2. Diebold, J. B. and P. L. Stoffa, The traveltime equation, t -p mapping, and the inversion of common midpoint data, Geophysics, 46, 238–254, 1981.

  3. Fowler, S. R., R. S. White, G. D. Spence, and G. K. Westbrook, The Hatton Bank continental margin—II. Deep structure from two-ship expanding spread seismic profiles, Geophys. J., 96, 295–309, 1989.

  4. Hirata, N. and N. Shinjo, SEISOBS—modified version of SEIS83 for ocean bottom seismograms—, Zisin2 (J. Seismo. Soc. Jpn.), 39, 317–321, 1986 (in Japanese).

  5. Hirata, N., H. Tokuyama, and T. W. Chung, An anomalously thick layering of the crust of the Yamato Basin, southeastern Sea of Japan: the final stage of back-arc spreading, Tectonophysics, 165, 303–314, 1989.

  6. Hirata, N., B. Karp, T. Yamaguchi, T. Kanazawa, K. Suyehiro, J. Kasahara, H. Shiobara, M. Shinohara, and H. Kinoshita, Oceanic crust in the Japan Basin of the Japan Sea by the 1990 JAPAN-USSR Expedition, Geophys. Res. Lett., 19, 2027–2030, 1992.

  7. Isezaki, N., Possible spreading centers in the Japan Sea, Marine Geophys. Res., 2, 265–277, 1975.

  8. Isezaki, N., A magnetic anomaly map of the Japan Sea, J. Geomag. Geoelectr., 38, 403–410, 1986.

  9. Isezaki, N. and Y. V. Shevaldin, Geomagnetic anomalies of the Japan Sea, in Geology and Geophysics of the Japan Sea, Japan-USSR Monograph Series 1, edited by N. Isezaki, I. I. Bersenev, K. Tamaki, B. Y. Karp, and E. P. Lelikov, pp. 41–47, Terrapub, 1996.

  10. Isezaki, N. and S. Uyeda, Geomagnetic anomaly pattern of the Japan Sea, Marine Geophys. Res., 2, 51–59, 1973.

  11. Kim, H. J., S. J. Han, G. H. Lee, and S. Huh, Seismic study of the Ulleung Basin crust and its implications for the opening of the East Sea (Japan Sea), Marine Geophys. Res., 20, 219–237, 1998.

  12. Kurashimo, E., M. Shinohara, K. Suyehiro, J. Kasahara, and N. Hirata, Seismic evidence for stretched continental crust in the Japan Sea, Geophys. Res. Lett., 23, 3067–3070, 1996.

  13. Ludwig, W. J., S. Murauchi, and R. E. Houtz, Sediments and structure of the Japan sea, Geol. Soc. Am. Bull., 86, 651–664, 1975.

  14. Murauchi, S., Seismic crustal structure of the Japan Sea by controlled source experiment, Kagaku, 42, 367–375, 1972 (in Japanese).

  15. Nakasa, Y. and H. Kinoshita, A supplement to magnetic anomaly of the Japan Basin, J. Geomag. Geoelectr., 46, 481–500, 1994.

  16. Nishisaka, H., M. Shinohara, T. Sato, R. Hino, K. Mochizuki, and J. Kasahara, Crustal structure of the Yamato Basin and the margin of the northeastern Japan Sea using ocean bottom seismographs and controlled sources, Zisin2 (J. Seismo. Soc. Jpn.), 54, 365–379, 2001 (in Japanese with English abstract).

  17. Nishizawa, A. and A. Asada, Deep crustal structure off Akita, eastern margin of the Japan Sea, deduced from ocean bottom seismographic measurements, Tectonophysics, 306, 199–216, 1999.

  18. Sato, T., M. Shinohara, K. Suyehiro, B. Y. Karp, R. G. Kulinich, and N. Isezaki, Seismic velocity structure of Kita-Yamato Trough, Japan Sea revealed by ocean bottom seismometer and airgun survey, Zisin2 (J. Seismo. Soc. Jpn.), 53, 337–355, 2001 (in Japanese with English abstract).

  19. Seama, N. and N. Isezaki, Sea-floor magnetization in the eastern part of the Japan Basin and its tectonic implications, Tectonophysics, 181, 285–297, 1990.

  20. Shinohara, M., K. Suyehiro, S. Matsuda, and K. Ozawa, Digital recording ocean bottom seismometer using portable digital audio tape recorder, J. Japan Soc. Marine Surveys Technol., 5, 21–31, 1993 (in Japanese with English abstract).

  21. Shinohara, M., N. Hirata, and N. Takahashi, High resolution velocity analysis of ocean bottom seismometer data by τ-p method, Marine Geophys. Res., 16, 185–199 1994.

  22. Talwani, M. and O. Eldholm, Evolution of the Norwegian-Greenland Sea, Geol. Soc. Am. Bull., 88, 969–999, 1977.

  23. Tamaki, K., K. Suyehiro, J. Allan, J. C. Ingle, Jr., and K. A. Pisciotto, Tectonic synthesis and implications of Japan Sea ODP Drilling, Proc. ODP, Sci. Results, 127/128, edited by K. Tamaki, K. Suyehiro, J. Allan, M. McWilliams et al., pp. 1333–1348, Pt. 2 College Station, TX Ocean Drilling Program, 1992.

  24. Wessel, P. and W. H. F. Smith, New, improved version of the Generic Mapping Tools released, EOS Trans. Am. Geophys. Union, 79, 579, 1998.

  25. White, R. S., D. P. McKenzie, and R. K. O’Nions, Oceanic crustal thickness from seismic measurements and rare earth element inversions, J. Geophys. Res., 97, 19683–19715, 1992.

  26. Whitmarsh, R. B., P. R. Miles, and A. Mauffret, The ocean-continent boundary off the western continental margin of Iberia I. Cruatal structure at 40°30′, Geophys. J. Int., 103, 509–531, 1990.

  27. Yoshii, T., Terrestrial heat flow and features of the upper mantle beneath the Pacific and Sea of Japan, J. Phys. Earth, 20, 271–285, 1972.

Download references

Author information

Correspondence to Takeshi Sato.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Sato, T., Shinohara, M., Karp, B.Y. et al. P-wave velocity structure in the northern part of the central Japan Basin, Japan Sea with ocean bottom seismometers and airguns. Earth Planet Sp 56, 501–510 (2004) doi:10.1186/BF03352509

Download citation

Key words

  • P-wave velocity structure
  • Japan Basin
  • Japan Sea
  • ocean bottom seismometer