Segmentation of the Earth’s Crust of the Tien Shan by Geophysical Data

The paper presents the results of a comprehensive analysis of geological studies with data on the deep structure obtained by various geophysical methods for the Tien Shan territory. The areas of junction of different tectonic segments are characterized by anomalies of increased electrical conductivity, are clearly manifested in the magnetic and gravity fields and correspond to the zones of deep faults. Studying of these objects having high permeability and providing heat and mass flow as well as transport of fluids, is the main object of this work. In order to identify the boundaries of the largest tectonic fragments of the Tien Shan the geoelectric and velocity sections along the profiles intersecting the main tectonic elements of the Tien Shan were analyzed. Comparison of velocity anomalies in seismotomographic sections and objects of abnormally low electrical resistivity in geoelectric sections of the Earth’s crust indicates the existence of zones of increased fracturing or plasticity in the indicated intervals of the Earth’s crust, as well as the coincidence of waveguides and zones of increased conductivity. The distribution of seismic events clearly shows the zones of the Northern, Middle and Southern Tien Shan and the segmentation of the Western and Central Tien Shan.