Parameters of the fault planes for the Crimean Black Sea region by averaged mechanism of close earthquakes
© L.A. Shumlyanskaya, V.Yu. Burmin, 2016
A modern field of stress of the Crimean Black Sea region was constructed. A method of averaged mechanisms was used to construct
the field of stress, which uses the earthquakes of varying intensity, including weak ones that prevail in the region. The research
allowed allocating 15 blocks in the areas with different pairs of forces compression-stretching. It has been shown that nodal plane,
formed under the influence of these forces describes the planes of rupture of tectonically active faults. Types of movements
within the faults, which occur in the Crimean Black Sea region, were found. It has been shown that the faults and types of movements
along them are related to the relief of Moho surface, and subcrustal mantle is a source of movement into the faults. Non-double-dipole
model of the source of stresses was used to solve averaged mechanism. It makes possible to show that the Yalta-Alushta seismo-focal zone
was formed by rotating the surrounding blocks counterclockwise. The axis of rotation corresponds to cross-section of the Salgir-Oktyabr'
and Orehovo-Pavlograd faults.
Key words: modern stress field, faired mechanism, parameters of the ruptures of the active fault.