Native metals, selenides, halogenides and brown ore assotiated minerals from the Amur and Verkhnyaya Arsha deposits (Southern Urals)

Abstract

The ores of Amur (Zn) and Verkhnyaya Arsha (Pb-Zn) stratiform sulfide deposits are replaced by brown ores in a supergene conditions. The main types of brown ores are massive aggregates of iron hydroxides, quartz breccias cemented by iron hydroxides and goethite pseudomorphoses after sulfide minerals. The supergene minerals include native metals (gold, zincian cooper, zinc), selenides (clausthalite, tiemannite), sulfides (acantite, galena), zincite, salts of oxyacids (minerals of jarosite, alunites and crandallite groups), phosphates (pyromorphite), sulfates (barite, anglesite), carbonates (cerussite), halogenides (iodargyrite, I-Br-chlorargyrite). Selenides in brown ores are found for the first time.

Keywords

• зона окисления
• бурые железняки
• гипергенные селениды
• группа ярозита
• группа крандаллита
• Амурское месторождение
• Верхне-Аршинское месторождение
• oxidation zone
• brown ores
• supergene selenides
• jarosite
• alunite
• crandallite group
• Amur and Verkhnyaya Arsha deposits