The first case study of super(230)Th/U and super(14)C dating of mid-valdai organic deposits

• Published in: Doklady earth sciences Vol. 438; no. 1; pp. 598 - 602
• Main Authors: Maksimov, F E, Kuznetsov, VYu, Zaretskaya, N E, Subetto, DA, Shebotinov, V V, Zherebtsov, I E, Levchenko, S B, Kuznetsov, D D, Larsen, E, Lyso, A, Jensen, M
• Format: Journal Article
• Language: English
• Published: 01.05.2011
• Subjects: Freshwater; Russia
• ISSN: 1028-334X; 1531-8354
• DOI: 10.1134/S1028334X11050217

From the viewpoint of precision and reliability of radioisotopic dating, deposits whose quantitative age can be determined through several methods of geochronometry are of special interest. The mutually conforming finite super(14)C and super(230)Th/U dates of buried Neopleistocene organic deposits, taken from the Tolokonka section by the North Dvina River (100 km downstream from the city of Kotlas), have been obtained for the first time in Russia. The stratigraphical reference of these results to those obtained via the optically induced luminescence for upper and lower bedding layers has been established. The presented geochronometric data have allowed us to consider the age of oxbow lake organic deposits completely reliable and refer the time of their formation to the Tyrbei warming within the MIS-3. The applicability of the new version of the super(230)Th/U method for dating of interglacial and interstadial deposits, for the purpose of solving the Middle and Late Neopleistocene chronostratigraphy issues, is confirmed.