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  • Platinoan Vysotskite with I...
    Spiridonov, E. M.; Belyakov, S. N.; Ivanova, Yu. A.; Egorov, K. V.; Naumov, D. I.

    Geology of ore deposits, 12/2021, Letnik: 63, Številka: 8
    Journal Article

    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 (Pd 0.51 Pt 0.27 Ni 0.20 Fe 0.02 )S and second (Pd 0.49 Pt 0.30 Ni 0.18 Fe 0.03 )S generations, square vysotskite microcrystals of the third generation (Pd 0.47 Pt 0.32 Ni 0.19 Fe 0.02 )S overgrown with fourth-generation vysotskite (Pd 0.45 Pt 0.33 Ni 0.19–0.21 Fe 0.01 )S; these generations are overgrown with fifth-generation vysotskite (Pd 0.45 Pt 0.35 Ni 0.18 Fe 0.02 )S with rims of sixth-generation vysotskite (Pd 0.43 Pt 0.37–0.38 Ni 0.16–0.17 Fe 0.02 )S and the highest-Pt vysotskite of the seventh generation (Pd 0.44 Pt 0.43 Ni 0.09 Fe 0.02 Ru 0.01 )S. Platinoan vysotskite metacrystals are surrounded by halo of small skeletal microcrystals cooperite (Pt 0.96–0.97 Ni 0–0.03 Ru 0.01 )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.