HR: 1340h
AN: S33A-1035    [Abstracts]
TI: Shear-wave Velocity Structure in the Southern Korean Peninsula
AU: * Jeon, K M
EM: kmjeon@kangwon.ac.kr
AF: Kangwon National University, 192-1, Hyoja-2-dong, Chunchon, 200-701, Korea, Republic of
AU: Kim, K Y
EM: kykim@kangwon.ac.kr
AF: Kangwon National University, 192-1, Hyoja-2-dong, Chunchon, 200-701, Korea, Republic of
AU: Hong, M H
EM: hmh2525@kangwon.ac.kr
AF: Korea Polar Research Institute, Songdo Techno Park, 7-50, Songdo-dong, Yeonsu-gu, Incheon, 406-840, Korea, Republic of
AU: Lee, J M
EM: jung@knu.ac.kr
AF: Kyungpook National University, Sangyeok-2-dong, Daegu, 702-701, Korea, Republic of
AU: Moon, W
EM: wmoon@eos1.snu.ac.kr
AF: Seoul National University, Shinlim-9-dong, Gwanak-gu, Seoul, 151-747, Korea, Republic of
AU: Baag, C E
EM: baagce@snu.ac.kr
AF: Seoul National University, Shinlim-9-dong, Gwanak-gu, Seoul, 151-747, Korea, Republic of
AU: Jung, H
EM: hjjung@kunsan.ac.kr
AF: Kunsan National University, Meeryong-dong, Gunsan, 573-701, Korea, Republic of
AB: In order to reveal the perspective of velocity structure in the southern part of the Korean peninsula, a seismic refraction profile was obtained along a 335-km NNW-SSE line in 2004. Seismic waves were generated by detonating 500~1000 kg explosives in drill holes at depths of 80~150 m. The seismic signals were recorded by portable seismometers at a nominal interval of 1.7 km. Shear velocity tomogram was derived using a series expansion method of traveltime inversion. The raypaths indicate existence of mid-crust interfaces at approximate depths of 2~3 and 15~17 km. The refraction velocity of the deeper interface, which may be the boundary between the upper and lower crust, is approximately 3.8 km/s. The Moho discontinuity with refraction velocity of 4.5 to 4.7 km/s has a maximum depth of 38 km under the southern central portion of the peninsula. The Moho becomes shallower as the central part of the Korean peninsula is approached.
DE: 0905 Continental structures (8109, 8110)
DE: 0935 Seismic methods (3025, 7294)
DE: 7205 Continental crust (1219)
DE: 7270 Tomography (6982, 8180)
DE: 8110 Continental tectonics: general (0905)
SC: Seismology [S]
MN: 2007 Fall Meeting