Geowebinar Insights

The report focuses on evaluating the technological properties of low-grade ferruginous manganese ores of weathering crust origin and determining the feasibility of their processing by geotechnological methods to obtain a high-value product—electrolytic metallic manganese. The study examined ores from the Kozinskaya ore area within the Seibinsk ore field, represented by redeposited ferruginous manganese formations containing 12–17% Mn and unsuitable for conventional beneficiation. The main scientific objective was to assess whether heap leaching could produce productive solutions suitable for manganese precipitation and subsequent electrolysis. Laboratory and pilot-scale column experiments were carried out, including ore pelletizing, sulfuric acid leaching in the presence of a reducing agent, purification of solutions from iron and non-ferrous metals, precipitation of manganese carbonate, and final electrolysis. The results showed efficient dissolution of manganese hydroxides, while pyrolusite and cryptomelane were more resistant. The produced electrolytic manganese fully met GOST quality standards. The study demonstrated the practical feasibility of processing high-iron and phosphorus-rich oxidized ores of the Seibinsk type and highlighted the importance of local reagent production for improving economic performance.

The report focuses on improving geochemical interpretation methods for regional geological mapping at a scale of 1:200,000 within the diamond-prospective Miniftyagskaya area, where kimberlite pipes with confirmed diamond mineralization had previously been identified. The main scientific problem is that the standard geochemical sampling density is insufficient for detecting small kimberlite bodies whose dimensions are significantly smaller than the observation grid spacing. To enhance data resolution, a denser computational GRID network with a reduced interpolation step and a finer contour interval system was proposed. In addition, an approach based on a calculated node matrix was developed, enabling rapid estimation of complex geochemical indicators, including additive and factor indices as well as area productivity parameters. Factor analysis and separation of geochemical fields into regional and local components were applied. As a result, linear and local anomalies of magnesium, chromium, nickel, and other elements were identified and interpreted as indicators of deep fault zones and possible kimberlite bodies. The study demonstrates how the predictive efficiency of geochemical surveys can be significantly improved without increasing the volume of field operations.