The geological-technological mapping of gold-sulfide ores from the Maiskoe deposit (northeast Russia) has revealed significant heterogeneities of important technological characteristics of mineral composition: total Au and Sb contents, amount of major Au-bearing minerals (pyrite and arsenopyrite), and Au/As ratio. The proportion between Au content of ore and the presence of Au-bearing pyrite and arsenopyrite, which is reflected in coefficient of Au content, is responsible for the quality of flotation concentrate.

Figures 7. Tables 7. References 5.

Key words: invisible gold, disseminated gold-sulfide ores, pyrite, arsenopyrite, coefficient of gold content, gold-bearing sulfides, quality of gold flotation concentrate

O.A. Tolkanov, OAO «Polymetall», pr. Narodnogo opolcheniya 2, St. Petersburg, 198216 Russia

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