Abstract
The article deals with the research findings of peculiarities of REE, Uranium and Thorium distribution in the territory surrounding the tailing of former Komsomolsk gold concentration plant according to the data from Betula pendula leaf testing. In the leaf element composition the slight deficiency of MREE and substantial excess of HREE are presented. In the nearest impacted area around the tailing, La, Yb, U and Th content, and Th/U ratio are lower than in the distant buffer area. It is shown, that value of Th/U ratio and REE can be an indicator for geochemical transformations of technogenic landscapes in mining districts. The results of the research can be used for biomonitoring of the territory around the tailing.
Highlights
For applied problem solving in geochemical researches, rare earth (REE) and radioactive (U, Th) elements are often used
The REE content of Betula pendula leaf around Komsomolsk tailing is shown in fig
Geochemical peculiarities of rare earth and radioactive elements distribution in the territory of Komsomolsk tailing according to the data of Betula pendula leaf testing are shown in the diagrams of indicator ratios of Th/U and La/Yb
Summary
For applied problem solving in geochemical researches, rare earth (REE) and radioactive (U, Th) elements are often used. The study of their distribution in natural and technogenic environments gives an opportunity for detecting of different classification features, determining of regularities, assessment of substance income sources and its differentiation degree [1,2,3,4]. Th/U ratio, REE in plant and soil matters can reflect geochemical compound of underlying rocks in the conditionally background areas, they allow detecting of the nature imbalance of these elements in technogenic landscapes [5,6,7,8,9,10]. The nonnatural geological features – tailings – have the most negative impact, where the significant amount of waste with untreated mineral components is stored. Heavy metals containing there migrate actively into the environment, pollute its components: atmosphere, surface water, ground waters, soil, flora, exceeding background concentrations and maximum permissible concentrations [11, 12]
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