Technique of GLI first-break refraction statics corrections and it''''s application in metal deposit
广义线性反演初至折射静校技术在金属矿区的应用

Determining near-surface velocity structures is a crucial first step in seismic data processing and imaging in geologically complex areas.The traditional refraction methods are inaccurate and incapable of recovering near-surface structures in geologically complex areas.We discuss the GLI first-breaks refraction static method,which is an iterative inversion algorithm and can get not only long wavelength solution,but also short wavelength solution.Applying the method in Tuwu porphyry copper deposit terrain covered with loose stones or soil,signal-to-noise ratio and accuracy have been improved significantly over the traditional refraction.