Basic functional relations in coal petrology

Abstract

Functional relations between the parameters of the organic system and external factors are established. The following parameters of the organic system are considered: the petrographic composition of the coal’s organic mass, expressed as the ratio of newly formed components F/Vt; the ash content A^d; and the concentration of microelements in the coal. The external factors considered are the partial pressure \({p_{{O_2}}}\) of pfree oxygen (in aerobic conditions), the oxygen activity [O₂] (in anaerobic conditions), and the activity of HCl^–, HS^–, and Cl^– in the infiltrating aqueous solution. The microelement content in the coal’s organic mass is determined from the concentrations in the infiltrating solution that reaches the organic system. The influence of the petrographic composition and the ash content of the coal on its microelement concentration is assessed. The characteristics of the mic roelements and their removal from associations in paragenesis are discussed.