Recent Data of Multidisciplinary Studies of the Major Pleistocene Climatic Events: Glaciations, Formation of Ice-Dammed Lakes, and Their Catastrophic Drainage in Altai (Mountains of Southern Siberia)

Agatova, A.R.; Nepop, R.K.; Moska, P.; Nikitenko, B.L.; Bronnikova, M.A.; Zhdanova, A.N.; Zazovskaya, E.P.; Karpukhina, N.V.; Kuzmina, O.B.; Nepop, A.R.; Ovchinnikov, I.Y.; Petrozhitskiy, A.V.; Uspenskaya, O.N.

Авторы: Agatova A.R., Nepop R.K., Moska P., Nikitenko B.L., Bronnikova M.A., Zhdanova A.N., Zazovskaya E.P., Karpukhina N.V., Kuzmina O.B., Nepop A.R., Ovchinnikov I.Yu, Petrozhitskiy A.V., Uspenskaya O.N.
Журнал: Transactions (Doklady) of the Russian Academy of Sciences. Earth Science Section
Том: 510
Номер: 2
Год издания: 2023
Первая страница: 459
Последняя страница: 464
Аннотация: The use of geological–geomorphological and geochronological (14C, OSL) methods allowedestablishing that the bordering mountains of the Chuya basin (Russian Altai) were affected by glaciation as early as the Middle Pleistocene, about 160–180 ka (MIS 6). However, the ice-dammed lake with the highest (up to 2100 m a.s.l.) strandlines in the Chuya and Kurai basins existed later than 90–80 ka, i.e., in the Late Pleistocene. This chronological benchmark limits the influence of the catastrophic outburst floods of the largest 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. The lake drained no later than 16 ka. Synchronously (about 17–16 ka) the accumulation of diluvial–lacustrine cyclites began in the Inya mouth. It was found that the accumulation of the Saldzhar formation in the Katun River valley between the mouths of the Chuya and Sema rivers was long-lasting during the entire MIS 2 not only as a result of flood events, but also due to gradual hydrological processes. It is necessary to revise the concept adopted by SibRISC in 2018. This concept assumes (i) the absence of ice-dammed lakes in intermont basins of Russian Altai in MIS 2 and (ii) the accumulation of the Inya and Saldzhar catafluvial formations, as well as thehigh and medium terraces they deposited in the valleys of the Chuya and Katun rivers before 90 ka.
Добавил в систему: Бронникова Мария Артемовна

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Recent Data of Multidisciplinary Studies of the Major Pleistocene Climatic Events: Glaciations, Formation of Ice-Dammed Lakes, and Their Catastrophic Drainage in Altai (Mountains of Southern Siberia)статья

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