Evidence for Azimuthal Anisotropy of Near-Surface in Eastern Siberia

P115 EVIDENCE FOR AZIMUTHAL ANISOTROPY OF NEAR-SURFACE IN EASTERN SIBERIA Abstract 1 Azimuthal anisotropy of the weathering layer was detected using S-waves from 3C VSP and 2x2C surface seismic data at the Urubchen-Tokhomo zone in Eastern Siberia. It shows significant correlation with surface topography. Time delay for the two-way travel time is up to 100ms and thickness of the anisotropic layer is up to 540m. This makes data processing for anisotropy much more complicated especially for surface observations. Introduction Urubchen-Tokhomo hydrocarbon bearing zone is situated in the Eastern Siberia and is considered a possible location for several new giant or