Open AccessRadioecological situation in the area of monazite placer in South Yakutia
Author(s) -
Peter I. Sobakin,
Ya. R. Gerasimov,
А. А. Перк
Publication year - 2019
Publication title -
geohimiâ
Language(s) - English
Resource type - Journals
ISSN - 0016-7525
DOI - 10.31857/s0016-7525644440-448
Subject(s) - placer mining , monazite , thorium , alluvium , geology , pollution , placer deposit , geochemistry , environmental science , dose rate , natural (archaeology) , radionuclide , radiometric dating , earth science , uranium , radiochemistry , zircon , geomorphology , chemistry , paleontology , ecology , materials science , physics , quantum mechanics , metallurgy , biology
The results of radioecological investigation of the territory of Vasilyevka monazite placer in South Yakutia are given. The processes of deposit development causing radioactive pollution of the territory are described. They induce high exposure rates of gamma-radiation on ground surface and higher concentration of thorium in soil and plants. Identified areas of natural concentrations of thorium in the alluvial sediments, creating the anomalously high values of dose rate of gamma radiation on the surface and is exceeding 9–23 times of the normal natural radiation background. The extent of wind dispersion of thorium from pollution source was estimated along its vertical distribution in a soil profile of podbours.