Volume 50, Number 7, 590-598, DOI: 10.1134/S1075701508070106

Maucherite from metamorphic-hydrothermal assemblages of the Noril’sk ore field

Yu. D. Gritsenko and E. M. Spiridonov

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Abstract

In the Noril’sk ore field, maucherite, Ni11As8, occurs in magmatic pentlandite-pyrrhotite-chalcopyrite ores transformed into pyrite-millerite-chalcopyrite and millerite-bornite ores under conditions of prehnite-pumplellyite and zeolite facies of metamorphism. Maucherite spatially associated with aggregates of Pd and Pt minerals, probably, as a pseudomorph after mayakite, PdNiAs, contains up to 1.5 wt % Pd. Maucherite is relatively abundant in metamorphic-hydrothermal apophyllite-anhydrite-calcite veins hosted in metaore. In these veins, maucherite occurs as finely split and long-prismatic crystals, their intergrowths, and as a constituent of complexly zoned antimonide-sulfoarsenide-arsenide nodules. Maucherite from veins contains up to 0.6 wt % S and Sb, whereas Pd, Pt, and Au are below the detection limit of an electron microprobe.
Original Russian Text © Yu.D. Gritsenko, E.M. Spiridonov, 2007, published in Zapiski Rossiiskogo Mineralogicheskogo Obshchestva, 2007, No. 3, pp. 79–85.

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