Seismotectonics of the Urals

摘要

Introduction. The earth's crust of the Urals, having experienced the epoch of geosynclinal development with active tectonic and volcano-magmatic processes in the pre-Paleozoic and Paleozoic time, in the Mesozoic-Cenozoic time experienced the epoch of platform development, which in the period of the recent tectonic activation resulted in the formation of the recent Uralian epiplatform orogen, which generated in the western part of the Uralian Paleozoic orogen destroyed by the processes of denudation. The recent Uralian orogen inherits the main features of the Paleozoic orogen structure. At the modern stage within the boundaries and in the vicinity of the recent Ural mountain belt rare sensible earthquakes with intensity from 3-4 to 5-6 on the MSK-64 scale are recorded, as well as rock bumps and natural-technogenic earthquakes at mining enterprises exploiting mineral deposits by means of underground mine workings. Research aims to estimate the connection between the manifestations of recent seismicity and tectonics of different age in the Ural region. Research methodology involved the estimation of sensible earthquakes position relative to the geological-tectonic structures of the contemporary, Paleozoic, and pre-Paleozoic age, as well as relative to the elements of the earth's crust recent vertical movements field morphology.Results. Conclusion has been made, that the earth's crust of the middle Urals is characterized by the greatest seismic activity in the area of the submeridional Ural mountain belt interference and the zone of recent submersions of the earth's surface with relatively increased velocities, having the north western direction corresponding to the direction of the pre-Riphean basement structures. Results application area. The results of the given work can be of help in the course of seismic zoning of the Ural territory, as well as when planning accommodation and when designing engineering facilities within the Ural region.