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- Title
Palladium and gold minerals from the Baronskoe-Kluevsky ore deposit (Volkovsky complex, Central Urals, Russia).
- Authors
Zaccarini, F.; Anikina, E.; Pusharev, E.; Rusin, I.; Garuti, G.
- Abstract
Drill cores from the newly discovered Baronskoe-Kluevsky Pd-Au deposit (Volkovsky massif, Central Urals) have been investigated by reflected-light and electron microscopy, and the ore minerals were analyzed by electron microprobe. The most abundant Platinum-group mineral (PGM) is vysotskite, ideally PdS, characterized by an unusual Pt,Ni-poor composition. Palladium also occurs in kotulskite (PdTe), stillwaterite (Pd8As3), and unknown Pd-As-Te compounds with vincentite-type Pd3(As,Te), stillwaterite-type Pd8(As,Te)3, and Pd7(As,Te)2 stoichiometries. The main carrier of Au is Pd-rich electrum, approaching the composition Au75Ag15Pd10, with minor Fe, Cu, Ni and Pt. The precious minerals are closely associated with minute blebs of chalcopyrite+magnetite disseminated throughout serpentinized olivine-apatite host rock. Paragenetic relationships among the ore minerals define a succession of crystallization events in the order: 1) Cu-Pd sulfides+electrum, 2) replacement by Pd-Te-As and late Pd-As PGM, 3) final replacement by magnetite. The paragenesis is tentatively related with cooling of a fluid phase in the late- to post-magmatic stage.
- Subjects
DRILL cores; ELECTRON microscopy; ORES; MINERALS; PLATINUM
- Publication
Mineralogy & Petrology, 2004, Vol 82, Issue 1/2, p137
- ISSN
0930-0708
- Publication type
Article
- DOI
10.1007/s00710-004-0049-1