TO TECTONICS AND METALLOGENY OF SHARYZHALGAY UPLIFT OF SIBERIAN PLATFORM (EAST SAYAN)

Abstract

The purpose of the work is to consider the tectonic and metallogenic features of the Sharyzhalgay uplift of the Siberian platform foundation using the method of the tectonic-metallogenic analysis. The area of the Sharyzhalgay uplift divided into four major blocks - terranes - is characterized by widely distributed linear and circular tectonic structures of different hierarchy. These are the zones of preexistent deep faults, granite and gneiss arches and domes that have metamorphic or igneous nature. Metallogenic zoning is determined by the types of different-rank tectonic elements and is expressed in the combination of linear (metallogenic, ore zones) and nonlinear areal units - ring, ellipsoidal (ore regions, clusters, fields). Manifestation of different tectonic elements of ore control is shown on example of the Okinsky mega anticlinal fold. Late and post-collision stage of orogenesis was productive for endogenous gold, rare-metal and rare-earth mineralization. It is associated with the development of the Central Asian superplume. In the deep structure of the earth's crust the structure of the inversion mafic layer including uplifts and deflections corresponds to the tectonic elements outcropping on the surface and indicates the presence of the areas of increased endogenous activity of the tectonosphere, i.e. suggests the redistribution and concentration of metallogenic elements.