Skip to main content

Advertisement

Resistivity structure of the central part of the Yamasaki fault studied by the multiple electrodes resistivity method

Article metrics

  • 263 Accesses

  • 6 Citations

Abstract

The Yamasaki fault system is a well known major, active fault in South-Western Japan. Large historical earthquakes have occurred along it. Several resistivity models of the Yamasaki fault have been proposed as the result of intensive electromagnetic investigations during the 1970’s and 1980’s. In 1996, a trench study was made of the cross-section of the Yasutomi fault which is the kernel of the Yamasaki fault system. The cross-section showed the occurrence of past major paleo-earthquakes. To clarify the deeper structure of the fault, multiple electrode resistivity soundings were conducted across the fault in 1997. Although the target sounding depth of the previous EM survey is different, the resistivity measurements show the boundary structure of the central part of the fault beneath the trench survey area. They also show the extent of a shallow conductive zone across the fault.

References

  1. Apparao, A., Developments in Geo-electrical methods, 293 pp., A. A. Balkema publishers, U.S.A., 1997.

  2. Electromagnetic Research Group of the Active Fault, Low electrical resistivity along an active fault, the Yamasaki fault, J. Geomag. Geoelectr., 34, 103–127, 1982.

  3. Handa, S. and N. Sumitomo, The geoelectric structure of the Yamasaki and the Hanaori faults, J. Geomag. Geoelectr., 37, 93–106, 1985.

  4. Hyogo Prefectural Government, A Brief Report of the Investigation of the Yamasaki Fault, Hyogo Prefecture, 28 pp., 1996 (in Japanese).

  5. Lin, A., T. Miyata, and T. Wan, Tectonic characteristics of the central Segment of the Tancheng-Lujiang fault zone, Shandong Peninsula, eastern China, Tectonophys., 293, 85–104, 1998.

  6. Research Group for Yamasaki fault, Review papers of Yamasaki fault (1), edited by Y. Kishimoto, 1988a (in Japanese and English).

  7. Research Group for Yamasaki fault, Review papers of Yamasaki fault (2), edited by Y. Kishimoto, 1988b (in Japanese and English).

  8. Reynolds, J. M., An Introduction to Applied and Environmental Geophysics, 796 pp., John Wiley & Sons, 1995.

  9. Scholz, C. H., N. H. Dawers, J.-Z. Yu, and M. H. Ander, Fault growth and fault scaling Laws: Preliminary results, J. Geophys. Res., 98, 21951–21961, 1993.

  10. Shima, H., Two-dimensional automatic resistivity inversion technique using Alpha centers, Geophysics, 55(6), 682–694, 1990.

  11. Shima, H., A practical 2D Automatic resistivity analysis for pole-pole array Data—Analysis algorithm and applications of “Resistivity Image Profiling”, BUTSURI-TANSA, 45(3), 1992 (in Japanese with English abstract).

  12. Shima, H., K. Kajima, and H. Kamiya, Resistivity Imaging Profiling, 206 pp., Kokon-shoin publishers, 1995 (in Japanese).

  13. Sibson, R. H., Fault rocks and fault mechanisms, Journal of Geological Society London, 133, 191–213, 1977.

  14. Sumitomo, N. and K. Noritomi, Synchronous precursors in the electrical Earth resistivity and the geomagnetic field in relation to an earthquake near the Yamasaki fault, South-West Japan, J. Geomag. Geoelectr., 38, 971–989, 1986.

  15. Unsworth, M., G. Egbert, and J. Booker, High-resolution electromagnetic Imaging of the San Andreas fault in Central California, J. Geophys. Res., 104, 1131–1150, 1999.

  16. Watanabe, K., Strain variationsofthe Yamasaki fault zone, Southwest Japan, Derived from extensometer observations, Part 1, On the long-term strain variations Derived from strain steps, Bulletin of the Disaster Prevention Research Institute, 41, March, 29–52, 1991a.

  17. Watanabe, K., Strain variations of the Yamasaki fault zone, Southwest Japan, Derived from extensometer observations, Part 2, On the short-term strain variations Derived from strain steps, Bulletin of the Disaster Prevention Research Institute, 41, June, 53–85, 1991b.

  18. Zohdy, A. A. R., A new method for the automatic interpretation of Schlumberger and Wenner sounding curves, Geophysics, 54(2), 245–253, 1989.

Download references

Author information

Correspondence to Kiyoshi Fuji-ta.

Additional information

Now at Sumitomo Bank Ltd.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Fuji-ta, K., Ikuta, O. Resistivity structure of the central part of the Yamasaki fault studied by the multiple electrodes resistivity method. Earth Planet Sp 52, 567–571 (2000) doi:10.1186/BF03351664

Download citation

Keywords

  • Fault Zone
  • Active Fault
  • Conductive Zone
  • Resistivity Structure
  • Fault Rock