Lower achaean crystal basement of southwest part of the Perm region

Structure of the earth's crust and position of surface of Lower Achaean crystal basement in the southwest part of the Perm Region on the basis of data on three CDP profiles are analyzed. The scheme of relief surface to take account of information on regional profiles, received in company «Permneftegeofizika» by the CDP method was made. This scheme differs from the published model of crystal basement relief. In particular, new data on situation of Kaltasinsky Graben with anomaly features of deep structure, which very useful for searches of oil and gas deposits below the known productive horizons, are obtained.