Paleolimnological reconstructions for Lake Arakhley (Central Transbaikalia, Russia) inferred from high-resolution reflection seismic data

D.A. Chensky; N.A. Gubin; V.A. Kazantsev; A.P. Fedotov

doi:10.31951/2658-3518-2022-A-4-1405

Authors

D.A. Chensky ¹
N.A. Gubin ¹
V.A. Kazantsev ²
A.P. Fedotov ³

¹ National Research Irkutsk State Technical University, 83 Lermontov str., Irkutsk, 664074, Russia
² Institution of Science Institute of Natural Resources, Ecology and Cryology of SB RAS, 26 Butina str., Chita, 672014, Russia
³ Limnological Institute SB RAS, 3 Ulan-Batorskaya str., Irkutsk, 664033, Russia

DOI:

https://doi.org/10.31951/2658-3518-2022-A-4-1405

Keywords:

high-resolution seismic data, Ivan-Arakhley lake system, Transbaikalia, LGM, Holocene

Abstract

High-resolution seismic data (65 km profiles) have been used to study the sedimentary infill of Ivan-Arakhley lake system (Lakes Arakhley, Ivan and Shakshinskoe). It found that full limnological cycle bears only sediment cover of Lake Arakhley. Total sediment infill of Lake Arakhley is 6-7 m, and it was be divided into three sequences. The uppermost ~2.5 m of sediment cover was presented by a normal lacustrine filling. Lacustrine sediments began to form ca. 21 cal. ka BP. The lake was almost dried during the regression occurred between ca. 3 and 2.6 cal. ka BP.