Identification of shifts and thrusts of the Yukka-Toksovsky fault zone in the vicinity of St. Petersburg based on remote sensing data

The structural features of the Yukki-Toksovskaya zone of strike-slip faults are considered. The results of the analysis of satellite images of the Yukki-Toksovskaya zone allow us to take a different look at the latest tectonics and geology of the area. The materials show a lens-shaped shear zone, which is atypical for the platform area. Inside the fault zone, bodies of giant tectonic breccia are mapped in the form of rhombohedrons, which are uncharacteristic for this area. The Yukki-Toksovo zone has been studied using structural analysis methods at the level of axial fault zones and fault planes. A description is given of the outcrops located on the fault axes or their wings. The kinematic types of faults are justified by studying the position of thrusts on their wings. A spectral seismic profile across a seismogenic scarp and one of the faults is presented. The magnitudes of vertical and horizontal movements along faults were measured based on the displacement of rocks of the marker horizon. Vertical fault planes have been studied and their genetic connection with thrust faults has been revealed as the development of a single shear zone. Zones of shear failures of several types were discovered. Shifts and thrusts have been identified in the near-surface part of the section of Upper Quaternary deposits. The faults of the Yukki-Toksovo zone are defined as left-lateral strike-slip faults. A preliminary assessment of the velocities of horizontal movements along the faults of the Yukki-Toksovo zone has been made. It is proposed to use the territory of the Yucca-Toksovo fault zone as a testing ground for studying Holocene paleoearthquakes.