The Sorsk essentially molybdenum deposit of copper-molybdenum association is situated in the Uibatsk pluton (East Siberia, Kuznetsk Alatau). The Uibatsk pluton is a derivative of a long-lived and deep-seated source of endogenic activity. It is composed of Uibatsk magmatites of gabbroid, monzonitoid and granite associations (Cm2 - O) hosting stocks and dikes of the Sorsk ore-bearing porphyry complex and post-ore dikes (D). Among the Uibatsk rocks, magmatic series of various tectonic regimes are distinguished: of pre-plate collision, syncollisional and postcollisional uplift for late orogenic. Evolution of the Uibatsk magmatism is characterized by a calc-alkaline trend typical for the regions with convergent regime. The Sorsk late magmatism developed according to the trend shifted toward the field of anorogenic granitoids which are characteristic of a region with extensional regime. On the basis of geotectonic position of the magmatites and on distribution of hydromagmatophile elements in them, the conclusion is drawn that two mantle sources were involved in magma genesis: one is upper depleted source and the other - lower metasomatized level rich in lithophile elements. The significance of the lower level increased during generation of porphyry magma. It is assumed that the copper supply was supported by an Uibatsk melt, and molybdenum - by a porphyry melt. The fluid-saturated porphyry melt promoted the extraction of copper from the host rocks and its redeposition together with molybdenum.
