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3D SV-wave Velocity Structure of East Asia using Rayleigh-Wave Tomography

레일리파 토모그래피를 사용한 동아시아의 3차원 SV파 속도구조

  • You, Seol-Han (Division of Geology and Geophysics, Kangwon National University) ;
  • Chang, Sung-Joon (Division of Geology and Geophysics, Kangwon National University)
  • 유설한 (강원대학교 지질.지구물리학부) ;
  • 장성준 (강원대학교 지질.지구물리학부)
  • Received : 2016.11.29
  • Accepted : 2017.01.31
  • Published : 2017.02.28

Abstract

We construct 3D SV-wave velocity structure of the crust and the upper mantle beneath East Asia from Rayleighwave group-velocity measurements. For the construction of the SV-wave velocity model at 10 ~ 100 km depth, we used seismic data recorded at 321 broadband stations in Korea, Japan, and China. Rayleigh-wave group-velocity dispersion curves were obtained by using the multiple filtering technique in the period range from 3 to 150 s. High SV-velocity anomalies are imaged beneath the East Sea from 10 km depth to deeper depth, implying that the Moho beneath the East Sea is between at 10 ~ 20 km depth. We estimated the Moho beneath the Korean peninsula to be around 35 km based on the depth where a high-velocity anomaly is observed. The SV-wave velocity model shows prominent fast S-velocity anomalies near northeastern Japan, associated with the subducting Pacific plate. Low-velocity anomalies are found beneath the east coast of the Korean peninsula at 100 km depth, which may play a role in the formation of the Ulleungdo and the Ulleung basin. We observed low-velocity anomalies beneath the Yamato basin at 100 km depth as well, which may indicate the upwelling of fluid from the Pacific plate via dehydration at deeper depth.

Acknowledgement

Supported by : 기상청, 강원대학교

References

  1. Baumgardner, R. B., and Frederickson, P. O., 1985, Icosahedraldiscretization of the two-sphere, SIAM Journal of Numerical Analysis, 22, 1107-1115, doi:10.1137/0722066. https://doi.org/10.1137/0722066
  2. Chang, S. J., and Baag, C. E., 2007, Moho depth and crustal vp/vs variation in southern Korea from teleseismic receiverfunctions: Implication for tectonic affinity between the Korean Peninsula and China, Bulletin of the Seismological Society ofAmerica, 97, 1621-1631. https://doi.org/10.1785/0120050264
  3. Cho, H. M., Baag, C. E., Lee, J. M., Moon, W. M., Jung, H.,Kim, K. Y., and Asudeh, I., 2006, Crustal velocity structure across the southern Korean Peninsula from seismic refractionsurvey, Geophysical Research Letters, 33, L06307, doi:10.1029/2005/GL025145.
  4. Chough, S. K., Kwon, S. T., Ree, J. H., and Choi, D. K., 2000,Tectonic and sedimentary evolution of the Korean Peninsula:a review and new view, Earth-Science Reviews, 52, 175-235. https://doi.org/10.1016/S0012-8252(00)00029-5
  5. Dziewonski, A., Landisman, M., and Bloch S., 1969, A technique for the analysis of transient seismic signals, Bulletin of the Seismological Society of America, 59, 427-444.
  6. Herrmann, R. B., 2013, Computer programs in seismology: An evolving tool for instruction and research, Seismological Research Letters, 84, 1081-1088, doi:10.1785/0220110096. https://doi.org/10.1785/0220110096
  7. Huang, J., and Zhao, D., 2009, Seismic imaging of the crust and upper mantle under Beijing and surrounding regions, Physics of the Earth and Planetary Interiors, 173, 330-348. https://doi.org/10.1016/j.pepi.2009.01.015
  8. Igarashi, T., Iidaka, T., Iwasaki, T., Shibutani, T., Ueno, T., and University group of the joint seismic observation at the Niigata-Kobe tectonic zone, 2009, Crust and upper mostmantle structure beneath central Japan inferred from receiver function analysis, Earth Planets Space, 61, 1215-1221. https://doi.org/10.1186/BF03352974
  9. Ishise, M., and Oda, H., 2005, Three-dimensional structure of P-wave anisotropy beneath the Tohoku district, northeast Japan, Journal of Geophysical Research, 110, B07304.
  10. Kennett, B. L. N., and Engdahl, E. R., 1991, Traveltimes for global earthquake location and phase identification, Geophysical Journal International, 105, 429-465, doi:10.1111/j.1365-246X.1991.tb06724.x https://doi.org/10.1111/j.1365-246X.1991.tb06724.x
  11. Kim, H. J., Park, C. H., Hong, J. K., Jou, H. T., Chung, T. W., Zhigulev, V., and Anosov, G. I., 1994, A seismic experiment in the Ulleung basin (Tsushima basin), southwestern Japan Sea (East Sea of Korea), Geophysical Research Letters, 21,1975-1978. https://doi.org/10.1029/94GL01596
  12. Kim, S. K., 1995, A study on the crustal structure of the Korean Peninsula, Journal of the Geological Society of Korea, 31, 393-403. (In Korean with English abstract)
  13. Ludwig, W. J., Murauchi, S., and Houtz, R. E., 1975, Sediments and structure of the Japan Sea, Geological Society of America Bulletin, 86, 651-664. https://doi.org/10.1130/0016-7606(1975)86<651:SASOTJ>2.0.CO;2
  14. Matsubara, M., Obara, K., and Kasahara, K., 2008, Three-dimensional P and S wave velocity structures beneath the Japan Islands obtained by high-density seismic stations by seismic tomography, Tectonophysics, 454, 86-103. https://doi.org/10.1016/j.tecto.2008.04.016
  15. Nakahigashi, K., Shinohara, M., Yamada, T., Uehira, K., Sakai, S., and Kanazawa, T., 2015, Deep slab dehydration and large-scaleupwelling flow in the upper mantle beneath the Japan Sea, Journal of Geophysical Research, 120, 3278-3292.
  16. Nakajima, J., and Hasegawa, A., 2004, Shear-wave polarization anisotropy and subduction-induced flow in the mantle wedge of northeastern Japan, Earth Planetary Science Letters, 225, 365-377. https://doi.org/10.1016/j.epsl.2004.06.011
  17. Nishida, K., Kawakatsu, H., and Obara, K., 2008, Three-dimensional crustal S wave velocity structure in Japan using microseismic data recorded by Hi-net tiltmeters, Journal of Geophysical Research, 113, B10302. https://doi.org/10.1029/2007JB005395
  18. Paige, C. C., and Saunders, M. A., 1982a, LSQR: An algorithm for sparse linear equations and sparse least squares, Transactions on Mathematical Software, 8, 43-71, doi:10.1145/355984.355989. https://doi.org/10.1145/355984.355989
  19. Paige, C. C., and Saunders, M. A., 1982b, LSQR: Sparse linear equations and least squares problems, Transactions on Mathematical Software, 8, 195-209, doi:10.1145/355993.356000. https://doi.org/10.1145/355993.356000
  20. Shiomi, K., Matsubara, M., Ito, Y., and Obara, K., 2008, Simple relationship between seismic activity along Philippine Sea slab and geometry of oceanic Moho beneath southwest Japan, Geophysical Journal International, 173, 1018-1029. https://doi.org/10.1111/j.1365-246X.2008.03786.x
  21. Simute, S., Steptoe, H., Cobden, L., Gokhberg, A., and Fichtner, A., 2016, Full-waveform inversion of the Japanese Islands region, Journal of Geophysical Research, 121, doi:10.1002/2016JB012802.
  22. Tamaki, K., 1988, Geological structure of the Japan Sea and its tectonic implications. Bulletin of the Geological Survey of Japan, 39, 269-365.
  23. Tonegawa, T., Hirahara, K., Shibutani, T., Iwamori, H., Kanamori, H., and Shiomi, K., 2008, Water flow to the mantle transition zone inferred from a receiver function image of the Pacific slab, Earth and Planetary Science Letters, 274, 346-354. https://doi.org/10.1016/j.epsl.2008.07.046
  24. Wei, W., Zhao, D., Xu, J., Wei, F., and Liu, G., 2015, P and S wave tomography and anisotropy in Northwest Pacific and East Asia: Constraints on stagnant slab and intraplate volcanism, Journal of Geophysical Research, 120, 1642-1666.
  25. Yoshizawa, K., Miyake, K., and Yomogida, K., 2010, 3D upper mantle structure beneath Japan and its surrounding region from inter-station measurements of surface waves, Physics Earth Planetary Interiors, 183, 4-19, doi:10.1016/j.pepi.2010.02.012. https://doi.org/10.1016/j.pepi.2010.02.012
  26. Zhao, D., Wang, Z., Umino, N., and Hasegawa, A., 2007, Tomographic imaging outside a seismic network: Application to the northeast Japan arc, Bulletin Seismological Society of America, 97, 1121-1132. https://doi.org/10.1785/0120050256
  27. Zheng, Y., Shen, W., Zhou, L., Yang, Y., Xie, Z., and Ritzwoller, M. H., 2011, Crust and uppermost mantle beneath the North China Craton, northeastern China, and the Sea of Japan from ambient noise tomography, Journal of Geophysical Research, 116, B12312, doi:10.1029/2011JB008637. https://doi.org/10.1029/2011JB008637