3D Imaging of Crustal Lithology with Diffraction Coherency Migration for VSP

M-15 3-D IMAGING OF CRUSTAL LITHOLOGY WITH DIFFRACTION COHERENCY MIGRATION FOR VSP CF. MUELLER 1 G. BELLFLEUR 1 G. PERRON 4 K. STEVENS 2 D. SNYDER 1 and B. MILKEREIT 3 Summary 1 Diffraction coherency migration (DCM) was applied to a multi-offset multi-azimuth vertical seismic profiling survey conducted in the northeastern part of the Sudbury impact structure in Ontario Canada. Seismic data was collected by the downhole seismic imaging (DSI) consortium with a three component geophone array in two boreholes using five shot points at the surface. Based on diffraction stack migration DCM was developed to enhance the subsurface image