Seismic investigation of the structural seismic anomaly zone of tectonic dislocation in the Kandalaksha-Dvina rift and Arkhangelsk horst suture zone

Abstract

The results of clarifying the deep Severodvinsk fault zone location are presented and its structure in the upper part of the section using shallow seismic survey by shear-wave reflection method and extensional reflected waves method using a system of multiple overlaps (CDP method) is considered. The site under study is located in the Kholmogorsky tectonic knot area (north of the EEP) and represents a zone of tectonic dislocation intersection. In the upper part of the section, a fracture zone was found accompanying this deep fault, in with water infiltration, discharge of reservoir gas fluids; karst was detected in carbonate rocks. This zone can be attributed to seismogenic, which implies a repetition of weak seismicity manifestation on the Arkhangelsk horst complicated by tectonic faults.