Processing and interpretation of data from a sonobuoy refraction seismic section in the east china sea shelf marginal ridge

摘要

Refraction seismic data obtained from a sonobuoy (SB7) in the East China Sea shelf marginal ridge was processed and interpreted. Intercept times and layer velocities were sued to set up a one-dimension depth-velocity model based on which a two-dimenssion depth-velocity crustal model was established through two-dimension ray-tracing. The computation results showed that the upper crustal depth-velocity model beneath lineSB7 is composed of four layers with primary wave velocities of 1.80-2.20, 2.85-2.90 3.24-3.34 and 4.55-6.00 m/s respectively.