STRUCTURAL CONTROL AND ZONALITY OF URANIUM-MOLYBDENUM ORES OF THE KURDAI DEPOSIT (SOUTHERN KAZAKHSTAN)

The Kurdai deposit is confined to a linear vent of a Devonian paleovol cano. In contrast to most uranium-molybdenum deposits, it is located i n basement rocks of a volcanic depression in the zone of a large fault , where magmatic and hydrothermal processes of different ages were ver y active. Formation of fracture systems took place under the overlying cover of a slightly dislocated volcanogenic-sedimentary complex, mani festing a sharp inhomogeneous vertical structure and controlling local ization of preore metasomatites and ore mineralization.