THE GOLD MINERALIZATION PLACERS IN THE BASIN OF ONA RIVER (THE WESTERN SAYAN, KHAKASIYA)
Done studying of gold mineralization and modern alluvial deposits and technogenic mineral formations in the basin of Ona river. Selected 16 samples, the total volume of 281 liters. In the dominated by large placer gold class more than 2,0 mm (54,02%) with the average content of 695 mg/m<sup>3</sup>. According to the morphomet-ric analysis of gold particles defined by the average values of the coefficients of flatness (24,19), roundness (0,80), sphericity (0,35) and isometric (3,95). The metal loss in the tailings meet the approved standards.