New Data on Age and Conditions of Buried Organic-Rich Sediments Formation in the Central Ob River
F. E. MAKSIMOV1, L. A. SAVELIEVA1, S. A. LAUKHIN2,3,4, V. Yu. KUZNETSOV1, Kh. A. ARSLANOV1, A. Yu. PETROV1, V. A. GRIGORIEV1, S. B. LEVCHENKO1
1Saint-Petersburg State University, 199034, St. Petersburg, Universitetskaya emb., 7-9
2Sergo Ordzhonikidzе Russian State Geological Prospecting University, 117997, Moscow, Miklukho-Maklay str., 23
3Nationаl Research University Moscow State University of Civil Engineering, 129337, Moscow, Yaroslavskoe Shosse, 26
4Earth Cryosphere Institute, SB RAS, 625026, Tyumen, Malyginа str., 86
Keywords: радиоизотопное датирование, спорово-пыльцевой анализ, межстадиальные и межледниковые условия, Th/U and С dating
, palynology, interstadial and interglacial conditions
Abstract
The article presents results of a comprehensive geochronological study of gyttja sediments from a profile located on a terrace above flood-plain on the right bank of the Ob River near Kolpashevo Town. The Th/U dating of the gittya yielded in ages in the range of 110-95 kyr. The results of the spore-pollen analysis suggest that the gyttja layer was formed in widespread middle taiga forest landscapes, with a dominance of spruce and that the climatic conditions were similar to modern. We assume that gyttja was formed in the interstadial time during MIS-5c or at the end of the Kazantsevo interglacial during the MIS-5e.
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