REFRACTION BOUNDARIES ON THE UPPER EARTH’S CRUST ON SOUTHERN PART OF REFERENCE GEOPHYSICAL TRAVERSE 3-DV
Digital processing of CDP data are registered on Southern part of 3-DV traverse is made by applying of dynamic conversion of head waves technique. Refracted waves time sections of the upper Earth’s crust through some tectonic structures of conjuction zone of Central-Asian folded belt and Siberian plate are constructed. New technique of refraction control is proposed. Technique is based on analysis of dynamic properties differences of initial seismograms and seismograms are result from applying of dynamic conversion method. This has made it possible to identify strong refraction on the upper Earth’s crust on Stanovaya fold area and on Aldanian shield (consequently, refraction coefficients are 0,15 km-1 and 0,23 km-1). Also, refraction is not recognized on the upper Earth’s crust on Chulmanskaya coal deep. It is proved that flat-lying refraction boundaries on folded areas are correspond to seismic boundaries of the 2nd kind (boundaries of sudden change of gradient of seismic waves velocity). Seismic section which is covering depth intervalthof 0-2 km was constructed over the total length of Southern part of traverse 3-DV. Upper Ear ,s crust on Chulmanskaya deep ischaracterized by two refrsaction horizons (crystalline basement and boundary on sedimentary cover). One refraction horizon is marked on fold environment of Chulmanskaya deep.