THE PROBLEM OF GENESIS OF GOLD AND SILVER SULFIDES AND SELENIDES IN THE KUPOL DEPOSIT ( Chukchi Peninsula, Russia )
N.E. Savvaa, G.A. Pal'yanovab, M.A. Byankinc
aNortheastern Complex Research Institute, Far East Branch of the Russian Academy of Sciences, ul. Portovaya 16, Magadan, 682000, Russia
bV.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
cChukotskaya Gorno-Geologicheskaya Kompaniya Joint-Stock Company, ul. Proletarskaya 11, Magadan, 685000, Russia
Keywords: Solfatara, mineralization stages, gold-silver mineralization, jarosite, yutenbogaardtite, fischesserite
Pages: 457-466
Abstract
Gold and silver minerals from the Kupol epithermal deposit, Chukchi Peninsula, were studied. A schematic sequence of mineral formation has been compiled. Specific mineral assemblages have been revealed in jarosite breccias: with native gold, yutenbogaardtite, fischesserite, acanthite, and native sulfur. We considered a possible mechanism of formation of gold and silver sulfides and selenides in volcanogenic deposits: They might have formed during solfatara and postsolfatara processes with the participation of volcanic gases or their condensates and sublimates as well as liquid sulfur (and selenium) and sulfuric hydrotherms produced under the interaction of volcanic gases with meteoric waters. The specific features of the Kupol deposit confirm the solfatara genesis of Au-Ag sulfides and selenides.
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