Gold-bearing placers of the Yurskoe deposit and their possible primary sources (Stanovoy Range)

The article presents information on the geology of the Verkhne-Timptonsky gold placer region, within which the Yurskoe placer deposit is located. A brief description of gold placers in the Yurski Stream basin is presented based on geological exploration results. Typomorphic features of native gold from the valley placer of the Yurski Stream were studied. Based on the studies, two types of the native gold were identified, that were related to different primary sources. The high-fineness gold of type I represents residual gold that entered the placer from Precambrian gold-bearing diaphthorites and from fissured weathering crusts in the diaphthorites. The medium- to low-fineness gold of type II of a low-temperature hydrothermal genesis entered the placer from Mesozoic volcanogenic molasse sequences. The question of whether these deposits are an intermediate collector for fragments of earlier gold mineralization, or there was a superposition of a late low-temperature mineralization, remains open. The prospects for identifying economically significant ore objects of various genetic types in the Yurski Stream basin are assessed