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The Interaction of Climatic and Tectonic Factors in the Formation of Sediment Runoff in the Holocene in the Khorlakel Lake Catchment (North Caucasus)статья
- Авторы: Shvarev S.V., Alexandrin M.Yu, Ivanov M.M., Golosov V.N.
- Журнал: Doklady Earth Sciences
- Том: 513
- Номер: Suppl.1
- Год издания: 2023
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: s75
- Последняя страница: s95
- DOI: 10.1134/S1028334X23602390
- Аннотация: Abstract—Khorlakel Lake is located in the central sector of the Greater Caucasus, on its northern macroslope.The drainless lake lies at an altitude of 2045.0 m above sea level on a tectonically determined subhorizontalstep with a height of 2020–2100 m a.s.l. associated with the frontal part of the thrust. Two cores weredrilled, and 17 samples for radiocarbon dating were taken in 2017 in the deepest (≈8 m) part of the lake, whichmade it possible to develop an age model for the range from 8000 to 500 yr BP. To interpret the stratigraphic–temporal sequence of lacustrine sediments, integrated geological and geomorphological studies in the catchmentsof the lake and Elbashi Creek and in adjacent territories were conducted. It was established that sedimentationin the lake is associated with the influence of the adjacent Elbashi Creek. A number of episodes ofproluvial activation over the last 8500 years with the formation of an outflow cone have been traced. This wasfollowed by lacustrine sedimentation in a dammed lake, the relic of which is Khorlakel Lake. As a result, sedimentationin Khorlakel Lake and in the adjacent territories is clearly divided into two stages with a boundaryat ≈3 ka BP with the accumulation of mainly nonorganic material at the first stage and organic material at thesecond stage. These stages include ten episodes, which are characterized by different sediments features andvarying proportions of mineral and organic components. It was found that the initial lake during the Holocenedecreased in size due to the uneven growth of the proluvial cone formed by sediments delivered from thecatchment of Elbashi Creek. It has been established that some lithostratigraphic boundaries in the bottomsediments of Khorlakel Lake correlate with known strong earthquakes in the Elbrus region, while otherboundaries relate to climatic events in the Central Caucasus that occurred during the Holocene. The completetermination of the connection between the current Khorlakel Lake and the Elbashi Creek catchmentoccurred in the last ≈1 ka BP.
- Добавил в систему: Шварев Сергей Валентинович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Гранки | EarthSci2360239Shvarev_corrected-szhatyij.pdf | 4,0 МБ | 12 декабря 2023 [ivanovm1991] |