The features of mineral composition are considered for clastic ores composing the main part of rich Cu-Zn ores of the Novy Shemur massive sulfde deposit, North Urals. Most abundant ore types include sulfde breccias, which are composed of pyrite and sphalerite clasts in chalcopyrite-sphalerite-pyrite matrix, and sulfde turbidites with rhythmic alternation of sphalerite and pyrite layers. The amount of newly formed pyrite, sphalerite and magnetite increases and the amount of clasts of primary ores decreases in a range from breccias to sandstones. In the same direction, the Zn, Cd, Ag, Pb and Ga contents increase, while the Cu, Au, As, Co, and Mn contents decrease. Index accessory minerals of sulfde breccias are electrum, utenbogaardite, tennantite (up to 3.52 wt. % Ag), Ag- and Se-galena (up to 1.7 wt. % Se) and enargite. The sulfde turbidites contain Ag-rich galena, magnetite, arsenopyrite, tetrahedrite, and cassiterite included in newly formed sulfdes. The matrix of clastic ores is characterized by the presence of Ga-bearing chlorite, mica, epidote and albite (Ga2O3 from 1.24 to 4.88 wt. %). Our data refect the peculiarities of mineral composition of rich Cu-Zn ores of the deposit and explain their high and higher contents of elements.

Figures 7. Tables 4. References 19.

Key words: North Urals, Novy Shemur deposit, copper-zinc ores, ore clasts, minerals, elements.

N.P. Safina, Institute of Mineralogy UB RAS, Miass, Chelyabinsk district, 456317 Russia; safina@ilmeny.ac.ru; South Urals State University, Miass branch, ul. 8 Iyulya 10, Miass, Chelyabinsk district, 456301 Russia

N.R. Ayupova,  Institute of Mineralogy UB RAS, Miass, Chelyabinsk district, 456317 Russia; South Urals State University, Miass branch, ul. 8 Iyulya 10, Miass, Chelyabinsk district, 456301 Russia

A.S. Tseluyko, Institute of Mineralogy UB RAS, Miass, Chelyabinsk district, 456317 Russia; South Urals State University, Miass branch, ul. 8 Iyulya 10, Miass, Chelyabinsk district, 456301 Russia

K.A. Filippova, Institute of Mineralogy UB RAS, Miass, Chelyabinsk district, 456317 Russia

1. Ayupova N.R. (2016) [Bi minerals in gossanites of the Aleksandrinskoe massive sulfde deposit (South Urals)]. Nauka YUUrGU. Materialy 68-y nauchnoy konferentsii [Science of SUSU. Materials of the 68th Scientifc Conference]. Chelyabinsk, SUSU, 261-264. (in Russian)
2. Ayupova N.R, Maslennikov V.V., Kotlyarov V.A., Maslennikova S.P., Danyushevskiy L.V., Large R. (2017) Selenium and indium minerals in the zone of submarine hypergenesis of the Molodezhnogo massive sulfde deposit, South Ural. Doklagy akademii nauk [Doklady Earth Sciences], 473(2), 190-194.
3. Ayupova N.R, Maslennikov V.V., Tessalina S.G., Shilovsky O.P., Sadykov S.A., Hollis S.P., Danyushev-sky L.V., Safna N.P., Statsenko E.O. (2017) Tube fossils from gossanites of the Urals VHMS deposits, Russia: Authigenic mineral assemblages and trace element distributions. Ore Geology Reviews, 85, 107-130.
4. Ayupova N.R, Melekestseva I.Yu., Maslennikov V.V., Tseluyko A.S., Blinov I. А. (2018) Uranium accumulation in modern and ancient Fe-oxide sediments: examples from the Ashadze-2 hydrothermal sulfde feld (Mid-Atlantic Ridge) and Yubileynoe massive sulfde deposit (South Urals, Russia). Sedimentary Geology, 367, 164-174.
5. Erdmann L., Graedel T.E. (2011) Criticality of non-fuel minerals: a review of major approaches and analyses. Environmental Science and Technology, 45, 7620-7630.
6. Kontar E.S. (2013) [Geological and economin types of Cu, Zn and Pb deposits of the Urals: geological setting, genesis, prospects]. Yekaterinburg, 199 p. (in Russian)
7. Kuskov V.N. (1983) [Structure of the Shemur ore feld (Northern Urals)] / Geologiya, poiski i razvedka mestorozhdeniy rudnykh poleznykh iskopayemykh [Geology prospecting and exploration of mineral deposits]. Irkutsk, 76-81. (in Russian)
8. Longinov V.V. (1973) [Sketches of ocean lithodynamics]. Moscow, Nauka, 243 p. (in Russian).
9. Maslennikov V.V. (2006) [Lithogenesis and formation of massive sulfde deposits]. Miass, IMin UB RAS, 348 p. (in Russian).
10. Maslennikov VV., Ayupova N.R, Maslennikova S.P., Tret’yakov G.A., MelekestsevaI.Yu., Safna N.P., Belo-gub E.V., Large R.R, Danyushevsky L.V, Tseluyko A.S., Gladkov A.G., KraynevYu.D. (2014) [Toxic elements in massive sulfde systems]. Yekaterinburg, UB RAS, 340 p. (in Russian)
11. Maslennikov V.V., Zaykov V.V. (2006) [Method of ore-facial analysis in geology of massive sulfde deposits]. Chelyabinsk, South Urals State University, 224 p. (in Russian).
12. Maslennikov V.V., Zaykov V.V. (1991) [Seafoor erosion and oxidation of sulfde mounds in paleooceanic structures] / Kremnisto-zhelezistyye otlozheniya kolche-danonosnykh rayonov [Silica-iron-rich sediments of VMS-bearing regions]. Sverdlovsk: UB AS USSR, 211-226. (in Russian)
13. Prokin V.A., Buslaev F.P., Ismagilov M.I. et al. (1988) [Massive sulfde deposits of the Urals: geological structure]. Sverdlovsk: UB AS USSR, 241 p. (in Russian).
14. Sankovich P.P., Kirkin E.V, Kuskov V.N. (1986) [Novy Shemur massive sulfde deposit in the Northern Urals. Unpublished report on exploration results from 1976 to 1986, with reserves at 1.09.86]. Ivdel, Vol. 1, 285 p. (in Russian).
15. Safina N.P., Ayupova N.R. (2017) [Diagenetic bournonite (CuPbSbS3) of clastic ores from the Saf’yanovka copper-zinc massive sulfde deposit, Central Urals]. Zapiski RMO [Proceedings of Russian Mineralogical Society], 146(2), 73-87. (in Russian)
16. Safina N.P., Ayupova N.R, Maslennikov V.V, Tseluiko A.S. (2018) Textural, structural and mineral peculiarities of ore facies of the Novy Shemur massive sulfde deposit, North Urals. Metallogeniya drevnikh i sovremennykh okeanov-2018 [Metallogeny of ancient and modern oceans-2018]. Miass, IMin UB RAS, 97-100. (in Russian)
17. Safina N.P., Maslennikov V.V. (2009) [Ore clastic sediments of the Yaman-Kasy and Saf’yanovka massive sulfde deposits, the Urals]. Miass, IMin UB RAS, 260 p. (in Russian).
18. Tseluyko A.S., Maslennikov V.V, Artemyev D.A. (2018) Microtopochemistry of pyrite nodules of siliceous siltstones from the Yubileinoe massive sulfde deposit (Southern Urals): LA-ICP-MS data. Litosfera [Lithosphere], 4(91), 621-641. (in Russian).
19. Zlotnik-Khotkevich A.G. (1984) [Mineral products of palagonitization of submarines basalts and their role in formation and localization of massive sulfde ores]. Metasomatizm i rudoobrazovaniye [Metasomatism and ore formation]. Moscow, Nauka, 160-172. (in Russian).