Abstract. The ore hand specimens and technological ore samples from the Porokhovskoe and Yugo-Konevskoe W greisen deposits in the South Urals are studied. The major W minerals of primary ores at both deposits include hubnerite and scheelite. The secondary and accessory minerals are pyrite, chalcopyrite and molybdenite, rare minerals include sphalerite, galena, bismuthinite, aikinite, unidentifed chalcogenides and sulfosalts, magnetite, rutile, ilmenite, titanite and columbite. The veins are mainly composed of quartz and muscovite with subordinate calcite, dolomite and fuorite, rare chlorite and amphibole and accessory zircon, apatite and uraninite. No zonation in the distribution of wolframite with various Fe content is identifed relative to the Yugo-Konevsky granite pluton, however, wolframite of the Northern area of the Porokhovskoe deposit is enriched in Fe compared to that of the Central area and Yugo-Konevskoe deposit. In addition to veined wolframite and scheelite, the oxidized ores also contain Fe and Mn oxyhydroxides, malachite, pyromorphite and bromargyrite. Tungsten is part of Mn and Fe oxyhydroxides, which replace wolframite and less often sulfdes. The WO3 content of pseudomorphic Mn and Fe oxyhydroxides after hubnerite 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, therefore all ores of both deposits were ascribed to primary type.
Keywords: South Urals, Porokhovskoe deposit, Yugo-Konevskoe deposit, tungsten, hubnerite, scheelite, stolzite, trace elements.
Received 22.03.2023, accepted 18.05.2023

D.A. Rogov, South Ural Federal Scientifc Center of Mineralogy and Geoecology UB RAS, Miass, Chelyabinsk district,  Russia; danil.rogov99@mail.ru

E.V. Belogub, South Ural Federal Scientifc Center of Mineralogy and Geoecology UB RAS, Miass, Chelyabinsk district,  Russia;

K.A. Novoselov, South Ural Federal Scientifc Center of Mineralogy and Geoecology UB RAS, Miass, Chelyabinsk district,  Russia;

M.A. Rassomakhin, South Ural Federal Scientifc Center of Mineralogy and Geoecology UB RAS, Miass, Chelyabinsk district,  Russia;

R.R. Irmakov, Urals Geological Exploration Expedition LLC,  Yekaterinburg,  Russia;

A.E. Chugaev, Urals Geological Exploration Expedition LLC,  Yekaterinburg,  Russia

1. Berger A., Janots E., Gnos E., Frei R., Bernier F. (2014) Rare earth element mineralogy and geochemistry in a laterite profle from Madagascar. Applied Geochemistry, 41, 218–228. Elokhin V.A. (2009) [Endogenic Mo-bearing rare metal complexes of the Urals]. Litosfera [Lithosphere], (3), 47–63. (in Russian)
2. Filatov V.V. (2005) [Uralian tungsten: the history of discovery]. Uralsky geologichesky zhurnal [Urals Geological Journal], (2), 139–154. (in Russian)
3. Filippova N.A. (1975) [Phase analysis of ores and products of their processing]. Moscow, Khimiya, 280 p. (in Russian)
4. Kasatkin A.V., Kuznetsov A.M., Arzamassev N.A.(2022) [Ore minerals of the Buranovskoe tungsten deposit (South Urals)]. Mineralogiya [Mineralogy], 8(3), 23–46. (in Russian)
5. Korovko A.V., Dvoeglazov D.A., Kuzovkov G.N. et al. (2015) [State Geological Map of the Russian Federation. Scale 1 : 200,000. Second edition. Central Urals Series. Sheet O-41-XXXII. Explanatory note]. Moscow, VSEGEI, 274 p. (in Russian)
6. Levin V.Ya., Savelyeva K.P., Barantsev V.V. et al.(1993) [Unpublished report «Assessment and geological and economic analysis of forecast resources of categories P3, P2, P1 of the main solid minerals as of 1.01.1993 on the territory of the activity of Uralgeolcom». Book 7 (tantalum, rare earths, tungsten, molybdenum)]. Yekaterinburg, 104 p. (in Russian)
7. Ling Q., Liu C. (2002) Review of rare earths and fuid-rock interaction. Rare Earths, 20, 570–578.
8. McDonough W.F., Sun S.-S. (1995) The composition of the Earth. Chemical Geology, 120(3–4), 223–253.
9. Morozova A.V. (2006) [Geochemistry of granites of the Central and South Urals productive for W-Mo and Be-W-Mo mineralization]. Litosfera [Lithosphere], (3), 171–177. (in Russian)
10. Novoselov K.A., Belogub E.V., Polenova E.E., Zabotina M.V., Kotlyarov V.A. (2022) The Koklan W-Mo deposit, Transuralia: mineralogical-geochemical zoning. Geology of Ore Deposits, 64, 221–242.
11. Petrov S.V. (1998) [Typomorphic and technological properties of wolframite]. Avtoreferat dissertatsii na soiskanie stepeny kandidata geologo-mineralogicheskikh nauk. [Abstract of Dissertation of Candidate of Geological-Mineralogical Sciences]. St. Petersburg, St. Petersburg State University, 16 p. (in Russian)
12. [Photometric analysis of W in rocks in form of a rhodanide complex]. Moscow, VIMS, 1968. 15 p. (in Russian)
13. Pokrovsky P.V. (1950) [Mineral composition, structural features and localization conditions of the Karas’evskoe, Porokhovskoe and P’yankovskoe W deposits of the Boevsky-Yugo-Konevskaya group]. Trudy Ural’skogo FAN SSSR [Proceedings of the Urals Branch of the Academy of Sciences of the USSR], 15–24. (in Russian)
14. Puchkov V.N. (2017) General features relating to the occurrence of mineral deposits in the Urals: what, where, when and why. Ore Geology Reviews, 85, 4–29.
15. Rundquist D.V. (1964) [Structures and principle of occurrence of quartz-rare metal vein deposits in the eastern slope of the Urals]. Geologiya rudnykh mestorozhdeny [Geology of Ore Deposits], (2), 21–37. (in Russian)
16. Solntsev N.I., Leontieva K.D. (1958) [Phase analysis of W ores and concentrates]. Sbornik nauzhnykh trudov GINTsVETMETa [Collection of Scientifc Works of GINTsVETMET], 14, 155–168. (in Russian)
17. Zoloev K.K., Levin V.Ya., Mormil S.I., Shardakova G.Yu. (2004) [Minerageny and deposits of rare metals, molybdenum, tungsten of the Urals]. Yekaterinburg, Ministry of Natural Resources of the Russian Federation, GUPR for the Sverdlovsk Region, Institute of Geology and Geochemistry UB RAS, UGSE, 336 p. (in Russian)
18. Zoloev K.K., Levin V.Ya., Rapoport M.S. (1995) [Geological and economic types of rare metal deposits of the Urals]. Izvestiya VUZov. Gorny zhurnal [News of Universities. Mining Journal], (10–12), 50–57. (in Russian)