Forms of gold in oxidized ore reworking products from the Maiskoe deposit

Abstract

The Maiskoye gold deposit occurs as part of a quartz-gold-sulphide formation in terrigenous rock sequences in Chukotka, Russia. Two main technological ore types: primary and oxidized were identified at the deposit. Oxidized ores are composed of quartz and mica with feldspar, scorodite, jarosite and sulphides. Gold in the oxidized ore of ore zone 1 is disseminated also in scorodite, oxidized forms of antimony and on coal. The main loss of metal in oxidized ore is due to the presence of scorodite, natural coal, non-metallic minerals and gold-bearing sulphides, which are intergrown with non-metallic minerals and also occur in free grains.