Seismotectonic Studies of the Sarma Paleoseismic Dislocation (Western Coast of Lake Baikal)

Abstract

The article presents the results of the first integrated geological and geophysical studies of the Sarma paleoseismic dislocation (PSD). Based on interpretation of sections of trench walls, analysis of shallow geophysics data (electric survey, seismic survey, ground-penetrating radar), and morphological profiling of microforms of the seismogenic relief, a conclusion has been reached on transpressional deformations. The displacement planes of the main reverse faults and thrusts dip to the northwest; minor ones, to the southeast. The kinematic characteristics of seismic movements indicate the formation of dislocations in the Primorsky fault zone under subhorizontal compression conditions.