All bauxite deposits of Northern Kazakhstan are of Mesozoic age of continental type and are represented by hydrargillitic ores. The largest of them are located within the western side and central part of the Turgai Trough and the southeastern slope of the Kazakhstan Shield (respectively, deposits of the West-Turgai, Central and Amangelda bauxite-ore districts).

The role of concentrations of dispersed matter in the formation of its micro-component composition was elucidated on the material of 160 samples of insoluble organic matter concentrates obtained by the enrichment method from sediments of different ages and different regions of the Soviet Union.