The article provides brief information on the geological structure of the northern part of the Uraltau zone. Within this zone is considered the most significant placer deposits and occurrences of gold: Kuchanovskoe, East-Utkalskoe, Kurgashskoe, Terrace and Kiryabinskoe, including the history of their discovery, development, composition of the host sediments and the heavy fraction, the content and the reserves of the metal. For the purpose of identification of primary sources of gold it was made testing of all types of rocks exposed in the sides of river valleys: quartz veins, sulfidation and silicified carbonaceous shales, apogabbro amphibolites, apodiabase green shales, gabbros, conglomerates, metavolcanics, primary sulphide and oxide ores. It is shown that the higher the content of gold is inherent in both the sedimentary carbonaceous deposits and their secant quartz veins and sulfidation metamagmatics of mazarinsky and kiryabinsky complexes, which could be the main primary source areas for the placers.

Microprobe analysis of the gold particles, selected from all of the placers by means of test of placers and quaternary alluvial-deluvial sediments, made it possible to study their geochemical features, including fineness, the composition of the impurity elements. It is found that in the placers there are two types of gold particles – a relatively deep high-grade (870-945) and shallow low-grade (660-775), sharply differing among themselves on the content of silver, mercury and elements of platinum group. In this regard, the search for gold mineralization within the territory should be focused simultaneously on sedimentary-hydrothermal-metamorphic and hydrothermal-metasomatic types of mineralization.