New geochemical data on distribution of gold mineralization in the ore lode sections of the Ridder-Sokolnoye deposit, the largest in Rudny Altai, confrm the crossing style of gold-quartz veins and gold-bearing stockwork relative to the zonal bodies of massive and disseminated massive sulfde polymetallic ores. The au content of massive sulfde ores positively correlates with base metal content in contrast to low-sulfde gold-quartz veins, which contain more than half of gold reserves of the deposit. the high content of quartz, subordinate amount of sulfdes, and dominant crustifcation and brecciated structures of gold-bearing veins, as well as their geochemistry, are similar to epithermal deposits rather than to massive sulfde deposits. An assemblage of rare minerals of veins with abundant tellurides and se enrichment is more typical of mineralization related to granitic magmatism.

Figures 10. tables 2. references 64.

Key words: Ridder-Sokolnoye deposit, Rudny Altai, massive sulfide mineralization, gold, tellurium, selenium.

G.D. Ganzhenko, Altai Geological-Ecological Institute, Ust-Kamenogorsk, Kazakhstan; gena72-100@mail.ru;

M.A. Yudovskaya, Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry RAS, Moscow;

I.V. Vikentyev, Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry RAS, Moscow

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