Radiochronological Studies of Modern Lake Sediments of the Kola Peninsula (Russia) Using Unsupported Pb-210 Isotope

For the study of modern sedimentation rates (up to 100–150 years), for example, in inland, shelf seas, and lakes, Pb-210 radionuclide was used. For two columns of modern lake sediments of the Kola Peninsula, Russia (Lake Shuonijaur—N69° 15′ 03,50″ E30° 02′ 32,37″ and Lake Virtuovoshjaur N68°46′ 09,05″ E28°49′ 26,77″) radiochronological studies were carried out. The reliability of the use of unsupported Pb-210 isotope for sedimentation rates estimation was shown. It confirms the constant sedimentation in these lakes during the last 100–150 years and the absence of strong mixing during sedimentation.