Inferred gold resources in carbonaceous deposits of the Gorodishche Formation (Trans-Ural Uplift)
This paper considers the geological structure of the Gorodishche Formation developed in the western Trans-Ural Uplift. Carbonaceous deposits represented widely in its composition were tested for gold. In black shale formations of the Gorodyshche Formation along the valley of the Osipovskiy Log rivulet, gold content up to 27 g/t was found to be confined to highly dislocated sulphidized and silicified rocks crossed by gabbro dykes. At a distance of 7 km northwards along the strike of the formation on the bank of the Sanarka river in the carbonaceous deposits intruded by plagiogranitic dykes, gold content was determined up to 7.7 g/t, suggesting the presence of a single zone of gold mineralization. This made it possible to calculate the inferred gold resources according to the P2 category and recommend this zone for further exploration and evaluation. The Osipovska gold occurrence is the first site identified in the carbonaceous deposits of the Trans-Ural Uplift.