Mineralogy of precious metals in ores of the Yubileinoe porphyry gold deposit (Kazakhstan)
O.Yu. Plotinskaya
Abstract
About autors
References
Abstract
Gold and silver mineralogy is studied in ores of the Yubileinoe porphyry gold deposit (Kazakhstan). Native gold is the major gold mineral. Its fneness varies from 970‰ in magnetite-hematite assemblage to 733–860‰ in pyrite-chalcopyrite assemblage. Silver occurs as admixture in native gold and, occasionally, as silver telluride. Native gold is associated with bi and Pb minerals: rucklidgeite, galenaclaustalite, and tetradymite-kawazulite. According to chlorite geothermometry, the Au, Ag and bi minerals precipitated at temperatures of 250-230 °С. These features are typical of the porphyry gold deposits worldwide.
Figures 5. Tables 3. References 17.
Key words: Urals, Kazakhstan, pophyry deposits, Yubileinoe deposit, mineralogy, gold, silver
About autors
O.Yu. Plotinskaya, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry RAS, Staromonenty per. 35, Moscow, 119017 Russia; plotin@igem.ru
References
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MINERALOGY № 3 2020