Vasilinovskoe Ore Occurrence: A New Copper–Gold–Platinoid Object in the Polar Urals (Yamal–Nenets Autonomous District, Russia)
Pleiades Publishing Ltd - Trang 1-9 - 2023
Tóm tắt
The first data on the composition of rocks and precious metals in the Vasilinovskoe copper–gold–platinoid ore occurrence, new in the Polar Urals, localized in metagabbro and metapyroxenite of the Late Ordovician Kershor Complex, are presented. Rocks containing a productive gold–platinoid mineralization are confined to hydrothermal alteration zones and are mainly represented by apogabbro and apopyroxenite propylites. The propylite formation temperature obtained with the help of pyrite–pyrrhotite and chlorite geothermometers corresponds to albite–calcite–chlorite and epidote–chlorite facies and varies within 200–310°C. The ore groundmass is composed of pyrite, chalcopyrite, and magnetite. Pyrrhotite, sphalerite, cobaltite, zinc greenockite, galena, ilmenite, titanite, rutile, cinnabar, native tin, molybdenite, coloradoite, supergene minerals such as bornite and covellite, chalcocite–spionkopite minerals, malachite, azurite, and iron hydroxides are minor. The precious metal mineralization is represented by Hg-bearing gold (including Hg-electrum and Hg-küstelite), gold and silver sulfides and tellurides (sylvanite (AuAgTe4), petzite (Ag3AuTe2), acanthite (Ag2S), hessite (Ag2Te), temagamite (Pd3HgTe3), and isomorphic series minerals such as merenskyite–moncheite (PdTe2-Pt,Pd)(Te,Bi)2), stibiopalladinite (Pd5Sb2), kotulskite (PdTe), sperrylite (PtAs2), and sopcheite (Ag4Pd3Te4), intergrowths of platinoids and an unknown mineral with an idealized formula Pd(Sb,Te), and possibly a Te-rich variety of sudburyite (PdSb). According to the mineralogical data, precious metals are released after a sample is crushed to a dimension of –0.25 mm. Relatively large (<0.15 mm) gold grains are separated first, then, during the crushing of sulfides, smaller gold flakes and precious metal grains are separated. The Vasilinovskoe ore occurrence is promising in terms of gold and platinoids.
Tài liệu tham khảo
N. I. Bezmen, N. I. Eremin, I. G. Narazauli, N. V. Pozdnyakova, and N. E. Sergeeva, Geokhimiya, No. 3, 384–389 (1978).
I. V. Vikentyev, R. Kh. Mansurov, Yu. N. Ivanova, E. E. Tyukova, I. D. Sobolev, V. D. Abramova, R. I. Vykhristenko, V. B. Khubanov, A. P. Trofimov, E. O. Groznova, S. S. Dvurechenskaya, and S. G. Kryazhev, Geol. Ore Deposits 59 (6), 482–521 (2017). https://doi.org/10.1134/S1075701517060058
A. P. Pryamonosov, A. E. Stepanov, T. V. Telegina, V. I. Kuznetsov, V. V. Grigor’ev, I. V. Abaturova, and E. Ya. Kuznetsova, The 1 : 200 000 State Geological Map of the Russian Federation, 2nd ed., Ser. Polar Urals, Sheet No. Q-41-XII, Explanatory Note (Karpinsky Russ. Geol. Res. Inst., Moscow, 2013). http://geo.mfvsegei.ru/200k/Zap/Zap_Q-41-XII.pdf.
D. N. Remizov, M. A. Shishkin, S. I. Grigor’ev, A. V. Stepunin, K. V. Kulikova, E. A. Lebedeva, A. D. Matyushkov, M. V. Nosikov, S. Yu. Petrov, M. N. Petrova, S. T. Remizova, M. L. Sakhnovskii, A. O. Kos’yanov, S. N. Sychev, S. N. Surikov, and M. A. Chuiko, The 1 : 200 000 State Geological Map of the Russian Federation, 2nd ed., Digital, Ser. Polar Urals, Sheet No. Q-41-XVI-Khord”yus Mountain, Explanatory Note (Kartfabr. Karpinsky Russ. Geol. Res. Inst., St. Petersburg, 2014). https://webftp.vsegei.ru/GGK200/Q-41-XVI/Q-41-XVI_ObZap.pdf.
L. I. Zyleva, A. L. Konovalov, A. P. Kazak, A. V. Zhdanov, K. V. Korkunov, V. A. Denisov, L. P. Novikova, N. A. Rumyantseva, Yu. P. Cherepanov, A. V. Cherkashin, and L. A. Khryukova, State Geological Map of the Russian Federation 1 : 1 000 000, the 3rd Generation, Ser. Western Siberia, Sheet No. Q-42-Salekhard, Explanatory Note (Kartfabr. Karpinsky Russ. Geol. Res. Inst., St. Petersburg, 2014). https://webftp.vsegei.ru/GGK1000/Q-42/Q-42_ObZap.pdf.
Yu. N. Ivanova, E. E. Tyukova, and I. V. Vikent’ev, in Proc. 12th Int. School on Earth Sciences Named after Professor L. L. Perchuk (ISES-2020), Sept. 11–15, 2020 g. (Inst. Volcanol. Seismol. Siberian Branch Russ. Acad. Sci., Petropavlovsk-Kamchatskii, 2020), p. 26.
V. V. Kenig and K. V. Butakov, Razvedka Okhrana Nedr, No. 11, 22–24 (2013).
L. A. Nikolaeva, A. N. Nekrasova, S. V. Yablokova, and L. V. Shatilova, Native Gold in Lode and Placer Deposits of Russia. Atlas, 2nd ed. (Central Research Institute of Geological Prospecting for Base and Presious Metals, Moscow, 2015) [in Russian].
A. M. Pystin, I. L. Potapov, Yu. I. Pystina, V. I. Generalov, S. A. Onishchenko, V. N. Filippov, A. A. Shloma, and V. V. Tereshko, Low-Sulphide Platinum Group Metals Metallization in the Polar Urals (Ural Branch RAS, Yekaterinburg, 2011) [in Russian].
R. I. Shaibekov, B. A. Makeev, N. N. Kononkova, S. I. Isaenko, and E. M. Tropnikov, Litosfera 21 (4), 574–594 (2021). https://doi.org/10.24930/1681-9004-2021-21-4-574-594
M. Cathelineau and D. Nieva, Contrib. Mineral. Petrol. 91, 235–244 (1985).
M. F. El-Sharkawy, Miner. Deposita 35, 346–363 (2000). https://doi.org/10.1007/s001260050246
L. Warr, Mineral. Mag. 85 (3), 291–320 (2021). https://doi.org/10.1180/mgm.2021.43
W. Zang and W. S. Fyfe, Miner. Deposita 30, 30–38 (1995).