Presented paper

IMWA2019 Students work

Supergene Gold In The Gold-Bearing Wastes Of Sulfide Deposits

Khusainova, Alfiia (1,2)
1: Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences (IGM SB RAS); 2: Novosibirsk State University (NSU)

The dumps of the pyrite-barite-polymetallic deposits of the Ursk ore field (Salairsky Ridge) have been studied by the author. As a result of research, it was found that secondary gold enrichment horizon was formed at the bottom of the dump, and it consists of supergene gold. Gold morphology was studied using scanning electron microscopy. This research makes an attempt to prove that this gold is newly formed, bearing traces of growth and consolidation. In addition, factors that contribute to the formation of this gold are considered. The obtained results are evidence of the high mobility of the dissolved forms of gold in an acidic medium, followed by their deposition on the geochemical barrier.