Mineral composition of heavy concentrates of the Kamennaya Sanarka gold placer (South Urals)
D.A. Rogov, M.A. Rassomakhin
The paper presents the results of study of heavy concentrates from the Kamennaya Sanarka gold placer in the South Urals. The +1 mm fraction contains kyanite, garnet, and staurolite, which are characteristic of host shists, whereas the –0.5 mm fraction contains accessory minerals of granite plutons; the –1 + 0.5 mm fraction is transitional in composition. Native gold in heavy concentrates is rounded and angular. It mostly contains Ag and Cu in single grains. Mercury in the composition of gold is present due to past gold amalgamation. On the basis of morphological and chemical features, native gold could probably be sourced from gold-(sulfde)-quartz veins in schists and gneisses, which compose the bedrock, as well as gold of remote transportfrom quartz veins of the Kamennaya Sanarka granite pluton.
Keywords: Kamennaya Sanarka, mineralogy, gold, primary source.
Received 25.04.2021, accepted 7.06.2021
MINERALOGY № 2 2020