Constructing Lithological/Geochemical Time Series in the Cross Sections of Bottom Sediments of Lake Karakel Using Data from Micro-XRF Scanning with a Beam of Synchrotron Radiation on the VEPP-3 Storage Ring

Cores of bottom sediments of Lake Karakel (Northern Caucasus) were obtained in 2010 and 2014 to perform geochemical studies for reconstructing the regional paleoclimate of the late Holocene. Solid samples of bottom sediments were scanned via micro-XRF with a step of 1 mm at the shared resource center of the Siberian Synchrotron and Terahertz Radiation Center. The contents of more than 20 elements were determined. The scan profiles are used to construct a single reference section with correction for a sediment layer dated via radiocarbon analysis, and to create a sediment core age–depth model.