D. A. Rogov, E. V. Belogub, K. A. Novoselov, M. A. Rassomakhin, R. R. Irmakov, A. E. Chugaev
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引用次数: 0
Abstract
Ore hand specimens and technological ore samples from the greisen-type Porokhovskoe and Yugo-Konevskoe tungsten deposits in the Southern Urals were studied. The major tungsten minerals in primary ores of both deposits are hübnerite and scheelite. Secondary and accessory minerals are pyrite, chalcopyrite and molybdenite; rare minerals are sphalerite, galena, bismuthinite, aikinite, unidentified Bi chalcogenides and sulfosalts, magnetite, rutile, ilmenite, titanite, and columbite. Veins are mainly composed by quartz–muscovite aggregate with secondary (calcite, dolomite, and fluorite), minor (chlorite and amphibole), and accessory (zircon, apatite, and uraninite). No distinct zonation in the distribution pattern of wolframite with varying Fe content relative to the Yugo-Konevsky granite pluton is identified. However, wolframites from the Northern area of the Porokhovskoe deposit are enriched in Fe compared to those from the Central area and Yugo-Konevskoe deposit. Along with through vein wolframite and scheelite, the oxidized ores also contain Fe and Mn oxyhydroxides, malachite, pyromorphite, and bromargyrite. Tungsten enters the composition of Mn and Fe oxyhydroxides, which replace wolframite and less often sulfides. The WO3 content in pseudomorphs of Mn and Fe oxyhydroxides after hübnerite reaches 18 wt %. Single grains of stolzite and russellite are found. According to the results of phase chemical analysis of technological samples, the amount of tungstite in oxidized ores is minor. Due to this, all ores of both deposits can be ascribed to primary technological type.
期刊介绍：
Geology of Ore Deposits is a periodical covering the topic of metallic and nonmetallic mineral deposits, their formation conditions, and spatial and temporal distribution. The journal publishes original scientific articles and reviews on a wide range of problems in theoretical and applied geology. The journal focuses on the following problems: deep geological structure and geodynamic environment of ore formation; distribution pattern of metallogenic zones and mineral deposits; geology and formation environment of large and unique metallic and nonmetallic deposits; mineralogy of metallic and nonmetallic deposits; physicochemical and isotopic characteristics and geochemical environment of ore deposition; evolution of ore-forming systems; radiogeology and radioecology, economic problems in exploring, developing, and mining of ore commodities.
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