The Vysotskite holotype: Metamorphogenic–Hydrothermal Vysotskite (Pd,Ni)S from the Noril’sk-1 Deposit

AbstractVysotskite is widespread in the Noril’sk-I deposit of Co–Ni–Cu sulfide massive and disseminated (“amygdaloid”) ores affected by posttrap low-grade metamorphism under conditions of prehnite–pumpellyite and zeolite (lomontite) facies, in association with ferruginous chlorite, babingtonite, ilvaite, greenalite, millerite, cummingtonite, grunerite, prehnite, pumpellyite, corrensite, polydymite, galena, and chalcopyrite. This metamorphosed sulfide ores facies formed at a low oxygen potential and the relatively increased fugacity of sulfide sulfur. Vysotskite here is extremely poor in platinum, but is enriched in nickel and partly in iron. Its average composition (wt %, n = 17): Pd 65.65 is Pt, 0.12; Rh, traces; Ni, 8.25; Fe, 0.95; Cu, 0.32; Co, 0.03; S, 25.03; and As 0.03; the sum is 100.38; the formula of this vysotskite is (Pd0.79Ni0.18Fe0.02Cu0.01)1S1. In terms of mineral associations and chemical composition it corresponds to the Vysotskite discovered by A.D. Genkin and O.E. Zvyagintsev (1962). Thus, the vysotskite holotype is a metamorphogenic–hydrothermal vysotskite of the Noril’sk-I deposit with the composition (Pd, Ni)S.