Rare elements in coal of the Ogodzha deposit (Upper Amur Region, Russian Far East)

Results of geochemical analysis for rare elements are present for coals of the Seam V-VI in the southeastern portion of the Ogodzha deposit. The concentration coefficients demonstrate low contents of almost all rare and dispersed elementsin the sampled section of the coalseam. The pair correlation and projection of variable values of the chemical elements onto the factor plane allow one to distinguish at least two groups of elements: the first group, Nd, Pr, Ce, La, Gd, Sm, Tb, Dy, Y, Ho, Er, Eu, Tm, Yb, Lu, and Pb, and the second group, Be, Rb, Mo, Cr, Ge, Co, Sc, V, Nb, U, Th, Cs, Sn, Li, Hf, Ga, and Zr. The grouping of rare elements according to the geochemical correlations suggests the presence of two separate metallogenic sources. The prospects for discovery of commercial-grade contents of rare elements in coals of the Ogodzha deposit remain quite high.