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Mineralogy of Precious Metals in Ores of the Biksizak Base–Metal Deposit, South Urals, Russia

Authors
  • Plotinskaya, O. Yu.1
  • Novoselov, K. A.2
  • Seltmann, R.3
  • 1 Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences, Moscow, 109017, Russia , Moscow (Russia)
  • 2 South Ural Federal Research Center of Mineralogy and Geoecology, Ural Branch, Russian Academy of Sciences, Institute of Mineralogy, Miass, 456317, Russia , Miass (Russia)
  • 3 Department of Earth Sciences, Natural History Museum, Center for Russian and Central EurAsian Mineral Studies, Cromwell Road, London, SW7 5BD, UK , London (United Kingdom)
Type
Published Article
Journal
Geology of Ore Deposits
Publisher
Pleiades Publishing
Publication Date
Nov 01, 2020
Volume
62
Issue
6
Pages
439–456
Identifiers
DOI: 10.1134/S1075701520060045
Source
Springer Nature
Keywords
License
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Abstract

AbstractGold and silver mineralogy is studied in ores of the Biksizak base-metal deposit (South Urals, Russia). This is a skarn-related carbonate replacement mineralization typical for marginal zones of porphyry-epithermal systems. The variability of precious metals minerals is established. Native gold (fineness 853 to 939) in assemblage with chalcopyrite and sphalerite is the most abundant. A telluride assemblage (tetradymite, hessite, stützite, petzite, galena, tellurobismuthite, rucklidgeite, altaite and native gold with a fineness of 830–900) and a silver–pearceite–acanthite assemblage (acanthite/argentite, pearceite–polybasite and gold–silver alloy from native gold with fineness of 747 to native silver) are identified. It is shown the exhibited variability is controlled by decreasing the temperature and variations in the tellurium and sulfur fugacities.

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