Abstract
Platinoan vysotskite metacrystals with inverse zoning are described. Their size is up to 0.5 mm. Association of these metacrystals are characterized by a “paracrystalline microboudinage” texture—specifically, corroded vysotskite fragments of the first (Pd0.51Pt0.27Ni0.20Fe0.02)S and second (Pd0.49Pt0.30Ni0.18Fe0.03)S generations, square vysotskite microcrystals of the third generation (Pd0.47Pt0.32Ni0.19Fe0.02)S overgrown with fourth-generation vysotskite (Pd0.45Pt0.33Ni0.19–0.21Fe0.01)S; these generations are overgrown with fifth-generation vysotskite (Pd0.45Pt0.35Ni0.18Fe0.02)S with rims of sixth-generation vysotskite (Pd0.43Pt0.37–0.38Ni0.16–0.17Fe0.02)S and the highest-Pt vysotskite of the seventh generation (Pd0.44Pt0.43Ni0.09Fe0.02Ru0.01)S. Platinoan vysotskite metacrystals are surrounded by halo of small skeletal microcrystals cooperite (Pt0.96–0.97Ni0–0.03Ru0.01)S. Platinoan vysotskite and cooperite develop in low-grade metamorphosed Co–Ni–Cu sulfide ores of the Oktyabrskoe deposit within the Noril’sk ore field, where these minerals replaced ferrous chlorite and corrensite, hydrogrossular, chalcopyrite, pentlandite, cubanite, and fassaite.
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ACKNOWLEDGMENTS
We are grateful to N.N. Korotaeva for high-quality microprobe analyzes and A.G. Mochalov for interesting comments.
Funding
This work was supported by the Russian Foundation for Basic Research (grant no. 19-05-00490) and was carried out using equipment purchased under the Lomonosov Moscow State University Development Program.
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Spiridonov, E.M., Belyakov, S.N., Ivanova, Y.A. et al. Platinoan Vysotskite with Inverse Zoning and Skeletal Cooperite in Metamorphosed Sulfide Ores Within the Eastern Flank of the Oktyabrskoe Deposit, Noril’sk ore Field. Geol. Ore Deposits 63, 842–849 (2021). https://doi.org/10.1134/S1075701521080109
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DOI: https://doi.org/10.1134/S1075701521080109