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The article comprehensively describes host rocks and ores of the Srednekanskaya Dike gold deposit. Ore formation was found to include several stages: metamorphogenic, hydrothermal-metasomatic (productive), and hypergenic. Characteristic features of gold mineralization have been revealed. The bulk of the gold is confined to vein quartz (1); gold fills interstitia in quartz, arsenopyrite, and pyrite (2); in quartz veins and quartz-carbonate-feldspar breccias, localized in microdiorites, gold is deposited in arsenopyrite and pyrite, and associated with diorite-porphyry - only in arsenopyrite (3); the decisive role in the formation of gold mineralization is played by structural control expressed by brecciation and hydrothermal metasomatosis of rocks and by resulting gold sedimentation in weakened zones (4).

Studies were taken of ore-bearing rocks, ores and gravity concentrates from Natalka gold deposit by a set of complex methods including mineralogical, petrographic and geochemical research, gravity concentration, and electronic microscopy. The major form of Au found is native: free gold is larger and dispersed, in the form of microinclusions. The obtained results are the basis for an effective technology to extract gold and sequence of profitable mining of Natalka deposit.

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