Morphology and peculiarities of chemical composition of monacites of alluvial piacers of Nizhneselemdzhinsky gold-bearing knot (Priamurie)

For the first time, micro-pond studies of monacites from the placards of the Nizheselemdzhinsky gold-bearing knot were carried out, reflecting their morphological and chemical features. Variations in the chemical composition of minerals have been noted. Concentration of radioactive (Hf up to 0.01, Th up to 8.3%) and noble elements (Ag up to 0.6 and Au up to 0.68%) is shown.