Volume 49, Number 7, 583-589, DOI: 10.1134/S1075701507070148

Mineralogy of oxidized ores at the Ik-Davlyat gold-base-metal deposit, the southern Urals

E. V. Belogub, K. A. Novoselov, V. A. Kotlyarov and I. B. Fadina

View Related Documents

Abstract

Three types of oxidized ores are identified in the Ik-Davlyat gold-base-metal deposit in the southern Urals: (1) carbonate-sericite-chlorite mineralized rock, (2) vein-shaped quartz-goethite-illite clay, and (3) limonitized rock related to veins. Heavy concentrate of the first type of ore is composed of goethite, rutile, native gold Au0.91Ag0.08Cu0.01, and chalcophanite Zn1.02Mn2.98O4 · 3H2O. The second type of ore contains goethite, rutile, Pb-bearing jarosite, native gold Au0.90−0.93Ag0.06−0.08Cu0−0.01Fe0−0.01, silver amalgamide (schachnerite) Ag0.75Hg0.97Au0.98-Ag0.75Hg0.97Au0.28, coronadite (Pb1.72Mn7.51Fe0.41Cu0.36)8O16, a chalcophanite-hydrohetaerolite mixture, and cerussite. Gold of the highest fineness (Au0.98Ag0.01Cu0.01) is associated with silver amalgamide. The third type of ore is quite similar to the first variety but contains a jarosite impurity. The composition of oxidized ores indicates a difference in composition of primary ores, in particular, the presence of lead minerals in primary veins. The first finding of chalcophanite in Russia is confirmed by chemical, optical, and X-ray data.
Original Russian Text © E.V. Belogub, K.A. Novoselov, V.A. Kotlyarov, I.B. Fadina, 2006, published in Zapiski Rossiiskogo Mineralogicheskogo Obshchestva, 2006, Pt CXXXV, No. 5, pp. 35–43.

Fulltext Preview

Image of the first page of the fulltext document