Mineral Paragenesis, formation stages and trace elements in sulfides of the Olympiada gold deposit (Yenisei Ridge, Russia)

• DOI: 10.1016/j.oregeorev.2022.104750
• Publication Date: 2022-02-05T15:24:46Z
• Authors: Sergey A. Silyanov; Anatoly M. Sazonov; Evgeny A. Naumov; Boris M. Lobastov; Yelena A. Zvyagina; Dmitry A. Artemyev; Natalia A. Nekrasova; Franco Pirajno
• Keywords: Arsenopyrite; Stibnite; Tetrahedrite; Paragenesis

The mineral sequence and LA-ICP-MS study of the trace-elements distribution in chalcogenides (arsenopyrite, pyrite, pyrrhotite, sphalerite, chalcopyrite, ullmannite, tetrahedrite, berthierite, stibnite, gudmundite, jamesonite) Olympiada gold ore deposit (Yenisei Ridge, Russia) are presented. was formed three stages, separated by tectonic breaks. Early (I) corresponds to paragenesis acicular arsenopyrite + pyrite pyrrhotite. At stage base-metal sulfides (II), deposition bulk sphalerite galena occurred. Mineral associations these stages determined gold-arsenic (Au-As) type ores. late (III) is characterized antimony minerals (stibnite berthierite gudmundite) gold-antimony (Au-Sb) type. Commercial concentrations were at early lattice bonded nanosize mode (12.5–1,512 ppm). progress process with formation polymetallic stibnite-berthierite mineralization led recrystallization (prismatic Au ∼ 36.4 ppm → dipyramidal 0.5 ppm), remobilization re-deposition a native form. Pyrite does not contain significant amounts (∼0.4 Silver absent sulfides, but concentrated tetrahedrite (348.0–3,811 jamesonite (0.1–7.7 (0.1–2.3 ppm) stibnite (0.2–2.0 later (III). (stage I) As-Au-W-Se-Te geochemical association; II) — Cu-Zn-Pb-Cd-In III) Sb-Co-Ni-Te-Bi-Pb-Hg-Ag association.