Absolute dating of sediments forming the Lena river terraces (Northeastern Siberia)
Vasilieva A.N. Murray A.S. Taratunina N.A. Buylaert J.-P. Lytkin V.M. Shaposhnikov G.I. Stevens T. Ujvari G. Kertész T.G. Kurbanov R.N.
August 2024Elsevier B.V.
Quaternary Geochronology
2024#83
Sediments of the Lena River represent an important environmental archive for understanding the Quaternary history of North-Eastern Siberia. However, at present, the structure, origin and age of the Lena River terraces are poorly known. This article presents results of lithofacies analysis and absolute dating of the Ust’-Buotama section exposing the fourth (Bestyakh) terrace of the Lena River. We report the first quartz and K-feldspar luminescence ages, the reliability of which was argued by age relations and standard tests. Three stratigraphic units have been recognized in the section (depths from the top): lacustrine-alluvial deposits (85–120 m) of the Mavrinka Formation; aeolian sand deposits of the Dolkuma Formation (23–85 m), and Holocene aeolian dune sediments (0–23 m). The resulting chronology suggests that the sediments of the Mavrinka Formation were deposited no later than 300 ka (MIS 9 or later). Deposition of the Dolkuma Formation occurred from ∼30 ka to ∼15 ka (late MIS 3 - late MIS 2). Holocene aeolian dune formed during initial Neoglacial cooling post climatic optimum (c. 5.5 cal ka BP). More extensive Late Holocene dune sediments which formed ∼400 years ago are coeval with Little Ice Age (11th-19th centuries).
Aeolian deposits , Aeolian dunes , Fluvial terraces , Holocene , Late pleistocene , Quaternary
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Al-Farabi Kazakh National University, Almaty, Kazakhstan
Department of Geoscience, Aarhus University, Aarhus, Denmark
Department of Physics, Technical University of Denmark, Roskilde, Denmark
Institute of Geography and Water Security, Almaty, Kazakhstan
Department Earth Sciences, Uppsala University, Uppsala, Sweden
Department of Geosciences and Geography, University of Helsinki, Helsinki, Finland
Institute for Geological and Geochemical Research, HUN-REN Research Centre for Astronomy and Earth Sciences, Budapest, Hungary
CSFK, MTA Centre of Excellence, Budapest, Hungary
Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Bem tér 18/c, Debrecen, H-4026, Hungary
Institute of Water Problems, Hydropower and Ecology, National Academy of Science of Tajikistan, Dushanbe, Tajikistan
Al-Farabi Kazakh National University
Department of Geoscience
Department of Physics
Institute of Geography and Water Security
Department Earth Sciences
Department of Geosciences and Geography
Institute for Geological and Geochemical Research
CSFK
Isotope Climatology and Environmental Research Centre
Institute of Water Problems
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