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Russian Geology and Geophysics

2009 year, number 3

Gold in the weathering crust at the Suzdal' deposit (Kazakhstan)

Yu.A. Kalinin, K.R. Kovalev, E.A. Naumov, M.V. Kirillov
Institute of Geology and Mineralogy, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
Keywords: weathering crust; typomorphic features of hypergene gold; Suzdal' gold deposit; Eastern Kazakhstan
Pages: 174-187


A comparative analysis of morphology and geochemistry was made for gold from the primary ores and weathering crust of the Suzdal' gold deposit, Eastern Kazakhstan. The deposit is localized in Carboniferous carbonaceous-terrigenous strata and is of gold-sulfide type. Study of gold from primary ores showed that it occurs mainly in two species: free and so-called invisible. Free gold is crystallomorphic segregations and irregular-shaped grains up to tens of microns in size; it occurs in intergrowths with sulfides, quartz, carbonate, and mica-chlorite aggregate. Most of gold particles have a fineness of 930-980