RARE AND TRACE ELEMENTS OF THE VERKHNIODNIPROVSKE DEPOSIT OF THE DNIPRO BROWN COAL BASIN AS AN INDICATOR OF UKRAINIAN SHIELD METALLOGENY

• Date: 2025
• Main Authors: Іванова, А.В., Зайцева, Л.Б., Гаврильцев, В.Б.
• Format: Article
• Language: English
• Published: Institute of Geological Sciences, NAS of Ukraine 2025
• Subjects: Dnipro brown coal basin; Ukrainian Shield; rare and trace elements; coal microcomponents; correlation analysis
• Online Access: http://geojournal.igs-nas.org.ua/article/view/316816
• Journal Title: Geological journal

The geochemical features of the coal from the Verkhniodniprovske deposit of the Dnipro brown coal basin, located within the Dnipro megablock of the Ukrainian Shield, have been studied. The position of the deposit within the Shield was defined according to metallogenic, geochemical, and landscape-geochemical zoning. It is shown that the crystalline rocks of the Ukrainian Shield are the source of rare and trace elements in the coal. Correlation analysis was used to evaluate the associations between the considered elements. Two stable associations have been found: Yb-Y-Be and Ti-Zr-Sc-V-Cr. The migration pathways of the elements into the peat bed and the possible forms of fixation of the elements in the organic matter of the coal are demonstrated. For the first time, an analysis of the correlations of the considered elements with the microcomponents of the coal organic matter of the lignitite, huminite-helite, fusinite and liptinite groups is presented. The most coalphilic elements are Be, Yb, Y, Ge, Mo, Sc. Elements such as Ti, Zr, V, Cr, Pb, Ga, Cu, La, Mn, Ni are more often associated with terrigenous material, which does not exclude their presence in coal in sorption and organically bound form. A highly correlated dependence of Ge on the resin content in the benzene extract was found, which makes it possible to recover Ge in the technological process of bitumen extraction from coal.