Abstract
The influence of the Holocene sedimentation conditions on uranium accumulation in sediments in Syrytkul Lake has been studied. The comparison of geochemical, palynological, and diatom data has made it possible to reveal the relation between the U concentration (5–89 ppm) in lacustrine sediments and environmental changes over more than 12 cal ka BP. The Late Glacial lake clay is relatively depleted in U. The maximum enrichment in U has been determined for lake sediments accumulated about 11.6–10.3 cal ka BP under climate warming and humidification. It has been concluded that the climate could have affected U accumulation through the catchment vegetation shifts. The dark coniferous forests that spread out after the climate cooling about 4.2 cal ka BP could have contributed to the U decrease.
Published Version
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