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

Abstract

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.