Petrochemical Features and Formation Affiliation of Igneous Rocks of the Kondakov Uplift (Eastern Donbass)

The ore specialization of mineral manifestations associated with igneous rocks depends on the formation affiliation of the latter, since specific igneous formations are characterized by a certain type of metallogeny. Therefore, the identification of the formation affiliation of igneous rocks of the Kondakov tectonic uplift (KTU) makes it possible to assess metallogenic specialization and make a forecast of mineralization. For this purpose, geological mapping data and the results of prospecting works, 145 chemical analyses of igneous rocks were used. The identification of magmatic bodies was carried out, the features of their morphology, spatial relationships, petrographic composition and petrochemical characteristics were revealed. It has been established that andesites with all varieties in the Nesvetaevsky magmatic complex make up 82 % of all studied rocks, which already makes it possible to attribute the rocks of this complex to a purely andesite formation. All geological bodies of the Nesvetaevsky magmatic complex are represented by small intrusions, the rocks of which have features characteristic of subvolcanic facies. These features, combined with geological and geophysical data, make it possible to attribute them to the root zones of the andesite formation. It is assumed that the rods, forces and dikes in retrospect represented intermediate magmatic chambers and supply channels of the Early-Middle Jurassic subaerial effusive magmatism. At the same time, the subvolcanic facies of the andesite formation are characterized by gold-silver and polymetallic specialization. According to the data obtained, it is assumed that the igneous rocks of the Nesvetaevsky KTU complex, which have all the signs of a subvolcanic facies of the andesite formation, are promising for the detection of gold-silver and polymetallic mineralization.