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Geoekologiya, 2020, Vol. 3, P. 64-73

MINERAL COMPOSITION, RADIOACTIVITY AND HEAVY METALS IN THE PLACER GOLD MINING WASTE OF THE AMUR REGION
I. V. Kuznetsovaa,# and N. V. Moiseenkoa,##

a Institute of Geology and Natural Management, Far Eastern Branch, Russian Academy of Sciences,
Relochny per. 1, Blagoveshchensk, 675000 Russia

#E-mail: kuzia67@mail.ru
##E-mail: kaunamka82@mail.ru

Research of placer gold mining waste in the basins of Neklya, Orlovka, Nadyaga, Gar'-3, Ul'degit and Ultu- chi rivers (Mazanovsky and Selemdzhinsky districts of the Amur Region) is presented. The mineralogical analysis, atomic adsorption analysis and scanning electron microscopy methods were used. The background radiation was measured by the SOEKS Quantum dosimeter. Mercury, arsenic, lead, zinc, antimony and oth­er heavy metals were determined. Radioactive minerals (zircon, monazite, columbite, thorite, ilmenite, etc.) were revealed in heavy fraction. In the considered placer gold mining waste, an increased background radia­tion was found. As a result of research, it is recommended to intensify ecological and radiation monitoring of the composition of rocks, which are assumed to contain radioactive minerals.

Keywords: technogenic placers, gold mining wastes, heavy metals, mercury, radioactive elements and minerals

DOI: 10.31857/S0869780920030054

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