NEW RESULTS OF MULTIDISCIPLINARY STUDIES OF MAJOR PLEISTOCENE CLIMATIC EVENTS: GLACIATIONS, FORMATION OF ICE-DAMMED LAKES AND THEIR CATACLYSMIC DRAINING IN ALTAI (MOUNTAINS OF SOUTHERN SIBERIA)
- Authors: Agatova A.R.1,2, Petrozhitskiy A.V.3,4, Ovchinnikov I.Y.1, Nepop A.R.5, Kuzmina O.B.6, Karpukhina N.V.7, Zazovskaya E.P.7, Zhdanova A.N.1, Bronnikova .A.7, Nikitenko B.L.6, Moska P.8, Nepop R.K.1,2, Uspenskaya O.N.9
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Affiliations:
- Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
- Ural Federal University
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- Novosibirsk State University
- Moscow Institute of Physics and Technology
- Trofimuk Institute of petroleum geology and geophysics, Siberian Branch of the Russian Academy of Sciences
- Institute of Geography, Russian Academy of Sciences
- Silesian University of Technology
- All-Russian Research Institute of Vegetable Crowing
- Issue: Vol 510, No 2 (2023)
- Pages: 201-207
- Section: СТРАТИГРАФИЯ
- URL: https://journals.rcsi.science/2686-7397/article/view/135775
- DOI: https://doi.org/10.31857/S2686739723600108
- EDN: https://elibrary.ru/UKEHUU
- ID: 135775
Cite item
Abstract
Application of geological geomorphological and geochronological (14C, OSL) methods allowed to establish that the bordering mountains of the Chuya basin (Russian Altai) were affected by glaciation already in the Middle Pleistocene – about 160–180 ka ago (MIS 6). However, the maximal ice-dammed lake with the highest (up to 2100 m a.s.l.) strandlines both in the Chuya and Kurai basins existed later than 90–80 ka ago, in the Late Pleistocene. This chronological benchmark limits the influence of the cataclysmic outburst floods from the largest ice-dammed lakes on the accumulation of the Inya formation in the Chuya and Katun river valleys. It is confirmed that a large ice-dammed lake existed and had a water level of at least 1730 m a.s.l. in MIS 2 in the Kurai basin. It was drained no later than 16 ka ago. Synchronously (about 17–16 ka ago) the accumulation of diluvial-lacustrine cyclites began in the Inya mouth. The Saldzhar formation had been depositing as a result of not only flood events, but also gradual hydrological processes in the Katun river valley between the mouths of the Chuya and Sema rivers during the entire MIS 2. It is necessary to revise the concept adopted by SibRISC in 2018. This concept assumes i) absence of ice-dammed lakes in intermountain basins of the Russian Altai in MIS 2 and ii) accumulation of the Inya and Saldzhar formations deposited by glacial megafloods in the valleys of the Chuya and Katun rivers before 90 ka ago.
About the authors
A. R. Agatova
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; Ural Federal University
Author for correspondence.
Email: agat@igm.nsc.ru
Russian,
Novosibirsk; Russian, Yekaterinburg
A. V. Petrozhitskiy
Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences; Novosibirsk State University
Email: agat@igm.nsc.ru
Russian, Novosibirsk; Russian, Novosibirsk
I. Yu. Ovchinnikov
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
Email: agat@igm.nsc.ru
Russian,
Novosibirsk
A. R. Nepop
Moscow Institute of Physics and Technology
Email: agat@igm.nsc.ru
Russian, Moscow
O. B. Kuzmina
Trofimuk Institute of petroleum geology and geophysics, Siberian Branch of the Russian Academy of Sciences
Email: agat@igm.nsc.ru
Russian,
Novosibirsk
N. V. Karpukhina
Institute of Geography, Russian Academy of Sciences
Email: agat@igm.nsc.ru
Russian, Moscow
E. P. Zazovskaya
Institute of Geography, Russian Academy of Sciences
Email: agat@igm.nsc.ru
Russian, Moscow
A. N. Zhdanova
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
Email: agat@igm.nsc.ru
Russian,
Novosibirsk
M. A. Bronnikova
Institute of Geography, Russian Academy of Sciences
Email: agat@igm.nsc.ru
Russian, Moscow
B. L. Nikitenko
Trofimuk Institute of petroleum geology and geophysics, Siberian Branch of the Russian Academy of Sciences
Email: agat@igm.nsc.ru
Russian,
Novosibirsk
P. Moska
Silesian University of Technology
Email: agat@igm.nsc.ru
Poland, Gliwice
R. K. Nepop
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; Ural Federal University
Email: agat@igm.nsc.ru
Russian,
Novosibirsk; Russian, Yekaterinburg
O. N. Uspenskaya
All-Russian Research Institute of Vegetable Crowing
Email: agat@igm.nsc.ru
Russian, Moscow
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