The Radionuclide 60Co as a Marker for Estimating the Scale of Transfer of Bottom Sediments in the Yenisei River during the Flood of 2006

The studies of bottom sediments of the Yenisei River from 2006 to 2016 near the Mining and Chemical Combine (MCC) and at a distance of up to 250 km from it downriver revealed an increased content of the radionuclide 60 Co (including radioactive microparticles) in the upper layers. The specific activ...

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Bibliographic Details
Published inDoklady earth sciences Vol. 505; no. 2; pp. 527 - 533
Main Authors Bolsunovsky, A. Ya, Dementyev, D. V., Vakhrushev, V. I.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 2022
Springer Nature B.V
Subjects
Bottom sediments
Caesium 137
Cesium 137
Cesium isotopes
Cesium radioisotopes
Earth and Environmental Science
Earth Sciences
Floodplains
Floods
Fluvial sediments
Geochemistry
Markers
Microparticles
Radioisotopes
Radionuclide kinetics
Rivers
Sediment
Sediments
Surface boundary layer
Surface layers
the Yenisei River
artificial radionuclides
bottom sediments
flood
dating of layers
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Summary:The studies of bottom sediments of the Yenisei River from 2006 to 2016 near the Mining and Chemical Combine (MCC) and at a distance of up to 250 km from it downriver revealed an increased content of the radionuclide 60 Co (including radioactive microparticles) in the upper layers. The specific activity of 60 Co in the river floodplain increased due to the extreme flood of 2006. The 137 Cs/ 60 Co ratio in the surface layers of bottom sediments after the flood varied from 0.2 to 1.0 and differed significantly from the 137 Cs/ 60 Co ratio (2.5–6.0) in the surface layers before the flood. The increased content of 60 Co in the upper layers of bottom sediments can serve as a marker of the 2006 event for calculating the sedimentation rate and dating the input of radionuclides into bottom sediments.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X22080049