Email this article Cyclic structure of the isotopic diagram of the lithalsa and its radiocarbon age, Sentsa River valley, Eastern Sayan
- Authors: Vasil’chuk Y.K.1, Vasil’chuk J.Y.1, Alexeyev S.V.2, Budantseva N.A.1, Alexeyeva L.P.2, Vasil’chuk A.C.1, Kozyreva Y.A.2, Svetlakov A.A.2
-
Affiliations:
- Lomonosov Moscow State University
- Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences
- Issue: Vol 489, No 5 (2019)
- Pages: 506-511
- Section: Geography
- URL: https://journals.eco-vector.com/0869-5652/article/view/18847
- DOI: https://doi.org/10.31857/S0869-56524895506-511
- ID: 18847
Cite item
Full Text
Abstract
The lithalsa, located on the first terrace of the Sentsa River in Okinsky district of the Republic of Buryatia, were studied. The most typical features of isotopic diagrams, obtained from the ice core from the 20-meter borehole, is their stage structure: three isotope minima at depths of approximately: 3-5, 9-12, and 18-21 m are separated by two distinct isotope maxima. Most likely, this is due to the cycle of the triple flooding of the growing permafrost mound and the subsequent active evaporation of the lake water - the main source of water in the ice core of lithalsa. Based on the detailed radiocarbon dating of organic material from the upper layers of the highest and surrounding lithalsas, the time of their formation was established. The active accumulation of organic material in dried heaving soils occurred from 0,5 to 0,2 ka BP. This is the time of the beginning of the formation of permafrost, active ice formation and the associated heaving process and lithalsa growth. The age of at least 3 of 4 studied mounds is not older than 200 years, it coincides with the cooling in the early 19th century.
Keywords
About the authors
Yu. K. Vasil’chuk
Lomonosov Moscow State University
Author for correspondence.
Email: vasilch_geo@mail.ru
Russian Federation, 1, Leninskie gory, Moscow, 119991
J. Yu. Vasil’chuk
Lomonosov Moscow State University
Email: vasilch_geo@mail.ru
Russian Federation, 1, Leninskie gory, Moscow, 119991
S. V. Alexeyev
Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences
Email: vasilch_geo@mail.ru
Russian Federation, 128, Lermontova street, Irkutsk, 664033
N. A. Budantseva
Lomonosov Moscow State University
Email: vasilch_geo@mail.ru
Russian Federation, 1, Leninskie gory, Moscow, 119991
L. P. Alexeyeva
Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences
Email: vasilch_geo@mail.ru
Russian Federation, 128, Lermontova street, Irkutsk, 664033
A. C. Vasil’chuk
Lomonosov Moscow State University
Email: vasilch_geo@mail.ru
Russian Federation, 1, Leninskie gory, Moscow, 119991
Ye. A. Kozyreva
Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences
Email: vasilch_geo@mail.ru
Russian Federation, 128, Lermontova street, Irkutsk, 664033
A. A. Svetlakov
Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences
Email: vasilch_geo@mail.ru
Russian Federation, 128, Lermontova street, Irkutsk, 664033
References
- Arzhannikov S.G., Braucher R., Jolivet M., Arzhannikova A.V., Vassallo R., Chauvet A., Bourles D., Chauvet F. // Quaternary Science Reviews. 2012. V. 49. P. 16-32.
- Vasil’chuk Yu.K., Alekseev S.V., Arzhannikov S.G., Alekseeva L.P., Budantseva N.A., Chizhova Ju.N., Arzhannikova A.V., Vasilchuk A.C. // Permafrost and Periglacial Processes. 2016. V. 27. Iss. 3. P. 285-296. doi: 10.1002/ppp.1876.
- Светлаков А.А. Особенности температурного режима грунтов в условиях южной геокриологической зоны Восточной Сибири: Дис. ... канд. геол.-минер. наук. Иркутск, 2018. 153 с.
- Котелевец Д.В., Васильчук Дж.Ю. // Арктика и Антарктика. 2018. № 1. С. 122-132. DOI: 10.7256/ 2453-8922.2018.1.25935.
- Алексеев С.В., Алексеева Л.П., Светлаков А.А., Козырева Е.А., Васильчук Ю.К. // Арктика и Антарктика. 2017. № 2. С. 136-149. doi: 10.7256/2453-8922.2017.2.23037.
- Алексеев С.В., Алексеева Л.П. // Лед и снег. 2018. Т. 58. № 4. С. 524-536. doi: 10.15356/2076-6734-2018-4-524-536.
- Васильчук Ю.К. // Криосфера Земли. 2011. Т. XV. № 3. С. 51-55.
- Rayleigh J.W.S. // Philosophical Magazine. Ser. 5. 1896. V. 42. № 259. P. 493-498. DOI: 10.1080/ 14786449608620944.
- Harris S.A. // Proc. Sixth Int. Permafrost Conf. Beijing, China. 1993. V. 1. P. 238-243.
- Gaanderse A.J.R., Wolfe S.A., Burn C.R. // Earth Surface Processes and Landforms. 2018. V. 43. Iss. 5. P. 1032-1043. doi: 10.1002/esp.4302.
- Calmels F. Genése et Structure du Pergélisol. Étude de Formes Périglaciaires de Soulévement au Gel au Nunavik (Québec Nordique), Canada: Thése de doctorat, Faculté des études supérieures de l’Université Laval, Québec, 2005. 169 p.
- Eddy J.A. // Science. New Series. 1976. V. 192. № 4245. P. 1189-1202.
- Wagner S., Zorita E. // Climate Dynamics. 2005. V. 25. Iss. 2/3. P. 205-218.
Supplementary files
