Radiation situation at the gold-bearing deposits of the Kuranakh ore field (South Yakutia)
https://doi.org/10.25587/SVFU.2022.27.3.003
Abstract
For the first time, a comprehensive assessment of the radiation and environmental situation was carried out at 9 gold deposits of the Kuranakh ore field (KOF), namely “Severnoye”, “Porphyrovoe”, “Tsentralnoye”, “Yuzhnoye”, “Pervukhinskoye”, “Bokovoe”, “Dorozhnoye”, “Delbe” and “Kanavnoye”. During the research, an integrated approach was used based on the application of geoecological, radioecological and geochemical research methods in combination with express and precise methods of field and laboratory work. It is shown that the gamma background in the study area varies from 7 to 26 mkR/h and does not exceed the background values characteristic of carbonate and terrigenous sedimentary rocks. In the fine-grained rocks of dumps and quarries, concentrations of 40K vary in the range of 0.6-10.1 mg/kg, 238U – 0.8-12.3, and 232Th – 0.5-10.8 mg/kg and generally correspond to those characteristic of sedimentary rocks. The effective specific activity of radionuclides in the fine-grained rocks varies from 38 to 386 Bq/kg. In addition to assessing the radioecological situation in the study area, we also studied the general ecological state of the natural environment in the KOF area. There is also a multifactorial anthropogenic and technogenic impact on natural landscapes. In particular, it is shown that in this area 47 % of the total area of the territory of natural landscapes is disturbed by geological exploration and mining operations. In general, according to the results of the conducted research, the radioecological situation in the studied area is currently assessed as favorable, and the ecological and geological situation can be characterized as tense, and in some cases even as a crisis.
About the Authors
A. P. Chevychelov
Institute of Biological Problems of Cryolithozone
Russian Federation
Russian Federation
CHEVYCHELOV Alexandr Pavlovich – Doctor of Biological Sciences, Сhief Researcher
Yakutsk
P. I. Sobakin
Institute of Biological Problems of Cryolithozone
Russian Federation
Russian Federation
SOBAKIN Pyotr Innokentievich – Doctor of Biological Sciences, Сhief Researcher
Yakutsk
A. N. Gorokhov
Institute of Biological Problems of Cryolithozone
Russian Federation
Russian Federation
GOROKHOV Alexey Nikolaevich – Candidate of Biological Sciences, Senior Researcher
Yakutsk
L. I. Kuznetsova
Institute of Biological Problems of Cryolithozone
Russian Federation
Russian Federation
KUZNETSOVA Lyubov Ivanovna – Research Engineer
Yakutsk
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Review
For citations:
Chevychelov A.P., Sobakin P.I., Gorokhov A.N., Kuznetsova L.I. Radiation situation at the gold-bearing deposits of the Kuranakh ore field (South Yakutia). Vestnik of North-Eastern Federal University Series "Earth Sciences". 2022;(3):33-43. (In Russ.) https://doi.org/10.25587/SVFU.2022.27.3.003
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