Results of mineralogical and geochemical investigations of rocks and ores of productive horizons of sandstone type of Dzhengeldy deposit

Abstract

Abstract The mineralogical and geochemical study of the productive horizons of the Dzhengeldy site was carried out from 2016 to 2020. It should be noted that each horizon has ore-bearing rocks with similar mineralogical and geochemical characteristics. We studied 2 horizons of the Dzhengeldy site (Maastricht and Lyavlyakan). Below are the results of studying the material composition and geochemical features of rocks and ores from deposits of the productive horizons of the Maastrichtian and Lavlyakan selected for various geochemical subzones: oxidized (oreless, selenium dispersion aureoles, uranium and selenium dispersion aureoles, uranium dispersion aureoles, selenium ores) and unoxidized (selenium dispersion aureoles, uranium and selenium dispersion aureoles, selenium ores, uranium ores, uranium dispersion aureoles, uranium and molybdenum dispersion aureoles, molybdenum dispersion aureoles) parts of zoning. It should be noted that the subzones of uranium-selenium, uranium-molybdenum and molybdenum mineralization localized in the grey part of the section have not been studied due to the lack of samples. The subzone of the uranium-molybdenum dispersion aureoles is represented by only one sample, the subzone of the molybdenum dispersion aureoles is represented by three samples (1 sample from the Lavlyakan horizon, 2 samples from the Maastrichtian horizon).