CONCERNING VERTICAL DISTRIBUTION OF TECTONIC STRESSES IN NEAR-SURFACE LAYERS OF THE EARTH’S CRUST
The paper presents data on tectonic stresses distribution in upper layers of the Earth’s crust obtained by different researchers. It is shown that according to the data measured by «doorstopper» stress-relief technique in mines of different countries and continents, horizontal tectonic stresses have the largest magnitude and in upper layers. They decrease with depth and are equal to vertical stresses on 1-2 km depth. The world map of tectonic stresses allows tracing their action up to 15 km at least. Measurements made by the stress-relief technique on the map are considered as the least representative ones. The paper presents data on stress state of rocks obtained when drilling such super-deep boreholes as the Kolskaya SG (super-deep) borehole-3 and Germanskaya KTV.