The Wangsan Fault: One of the most 'active' faults in South Korea?

Ree, Jin-Han;Kwon, Sung-Tack

  • Published : 2005.09.30

Abstract

The Wangsan Fault in the Gyeongju area shows the largest known displacement of about 28 m among the Quaternary reverse faults in South Korea. Recent optically stimulated luminescence (OSL) age data of the Quaternary deposits cut by the fault have been interpreted as suggesting that the time-averaged slip rate and maximum recurrence interval of the fault movement are 0.52 mma-1 and 50 ka, respectively. If considering the thickness of the Quaternary deposits exposed and assuming a uniform sedimentation rate, however, the slip rate and recurrence interval might be about five times higher and shorter, respectively.

Keywords

References

  1. Angelier, J., 1994, Fault slip analysis and paleostress reconstruction. In: Hancock, P.L. (ed.), Continental Deformation. Pergamon, Oxford, p. 53-100
  2. Cheong, C.S., Hong, D.G., Lee, K.S., Kim, J.W., Choi, J.H., Murray, A.S., Chwae, U., Im, C.B., Chang, C.J. and Chang, H.W., 2003, Determination of slip rate by optical dating of fluvial deposits from the Wangsan fault, SE Korea. Quaternary Science Reviews, 22, 1207-1211 https://doi.org/10.1016/S0277-3791(03)00020-9
  3. Kim, Y.-S., Park, J.Y., Kim, J.H., Shin, H.C. and Sanderson, D.J., 2004, Thrust geometries in unconsolidated Quaternary sediments and evolution of the Eupchon Fault, southeast Korea. The Island Arc, 13, 403-415 https://doi.org/10.1111/j.1440-1738.2004.00435.x
  4. Kyung, J.B., 1997, Paleoseismological study on the mid-northern part of Ulsan Fault by trench method. Journal of Engineering Geology, 7, 81-90
  5. Kyung, J.B. and Chang, T.W., 2001, The latest fault movement of the northern Yangsan Fault Zone around the Yugye-ri area, southeast Korea. Journal of the Geological Society of Korea, 37, 563-577. (in Korean with English Abstract)
  6. Lee, H.-K. and Schwarcz, H.P., 2001, ESR dating of the subsidiary faults in the Yangsan fault system, Korea. Quaternary Science Reviews, 20, 999-1003 https://doi.org/10.1016/S0277-3791(00)00055-X
  7. Lee, H.-K. and Yang, J.-S., 2003, ESR dating of the Wangsan fault, South Korea. Quaternary Science Reviews, 22, 1339-1343 https://doi.org/10.1016/S0277-3791(03)00018-0
  8. McCloskey, J., Nalbant, S.S. and Steacy, S., 2005, Earthquake risk from co-seismic stress. Nature, 434, 291 https://doi.org/10.1038/434291a
  9. Means, W.D., 1987, A newly recognized type of slickenside lineation. Journal of Structural Geology, 9, 585-590 https://doi.org/10.1016/0191-8141(87)90143-X
  10. Ni, S., Kanamori, H. and Helmberger, D., 2005, Energy radiation from the Sumatra earthquake. Nature, 434, 582 https://doi.org/10.1038/434582a
  11. Okada, A., Watanabe, M., Suzuki, Y., Kyung, J.B., Jo, W.-R., Kim, S.-K., Oike, K. and Nakamura, T., 1998, Active fault topography and fault outcrops in the central part of the Ulsan fault system, southeast Korea. Journal of Geography, 107, 644-658. (in Japanese with English Abstract) https://doi.org/10.5026/jgeography.107.5_644
  12. Park, Y., Ree, J.-H. and Yoo, S.-H., in press, Fault-slip analysis of Quaternary faults in southeastern Korea. Gondwana Research
  13. Ree, J.-H., Lee, Y.-J., Rhodes, E.J., Park, Y., Kwon, S.-T., Chwae, U., Jeon, J.-S. and Lee, B., 2003, Quaternary reactivation of Tertiary faults in the southeastern Korean Peninsula: Age constraint by optically stimulated luminescence dating. The Island Arc, 12, 1-12 https://doi.org/10.1046/j.1440-1738.2003.00372.x
  14. Sieh, K., 2005, Aceh-Andaman earthquake: What happened and what's next? Nature, 434, 573-574 https://doi.org/10.1038/434573a
  15. Stein, S. and Okal, E.A., 2005, Speed and size of the Sumatra earthquake. Nature, 434, 581-582 https://doi.org/10.1038/434581a