The investigations of electric and elastic ground properties on geologically and geomorphologically documented fault segments have been aimed at both solving technical problems and obtaining the data set required for the study of mode of occurrence and structure of tectonic faults. The results of geophysical investigations have been presented from the materials on the study of “Deren” tectonic structure in Mongolia. The geophysical investigations have been pursued at a depth of no more than 100 m.

As a result the technique of field measurements in fault zones has been proposed, and the data on unconformable distribution of geophysical parameters in the upper zone have been obtained. They correspond to seismogenic deformations and reflect the change in constitution and texture of loose deposits. The state of fractured zones in the upper original rocks has been determined, and the slope angle of contact blocks has been measured from the seismoelectrical and geoelectrical sections. It is proposed to use the realized technical approach in zoning of seismic hazard in pleistoseist zones of large earthquakes in Mongolia.