Native gold from the Kamenka-Barabanovsky and Kharuzovka alluvial placers (Northwest Salair Ridge, Western Siberia, Russia): Typomorphic features and possible bedrock sources

•Within the studded area, there are several sources of native gold of similar mineralization style.•The main bedrock source of gold for the Kamenka-Barabanovskaya placer is the Novolushnikovsky deposit.•The Kharuzovka placer has by several sources of native gold, including ores of Novolushnikovsky-type ores.•The composition alteration of native gold in the different grain domains is determined by the significant loss of Hg.