Email this article Coatings in cryoaridic soils and other records of landscape and climate changes in the Ak-Khol Lake basin (Tyva)
- Authors: Bronnikova M.A.1, Konoplianikova Y.V.1,2, Agatova A.R.3,4, Zazovskaya E.P.1, Lebedeva M.P.1,5, Turova I.V.1, Nepop R.K.3,4, Shorkunov I.G.1, Cherkinsky A.E.6
-
Affiliations:
- Institute of Geography
- Lomonosov Moscow State University
- Sobolev Institute of Geology and Mineralogy, Siberian Division
- Ural Federal University
- Dokuchaev Soil Science Institute
- Center for Applied Isotope Studies
- Issue: Vol 50, No 2 (2017)
- Pages: 142-157
- Section: Genesis and Geography of Soils
- URL: https://journals.rcsi.science/1064-2293/article/view/223867
- DOI: https://doi.org/10.1134/S1064229317020016
- ID: 223867
Cite item
Open Access
Access granted
Subscription Access
Abstract
An assemblage of coatings in cryoaridic soils (Skeletic Cambisols Protocalcic) of southwestern Tyva is considered as a key block of soil memory, which is an intrasoil archive of landscape and climate changes in regional geosystems in the Holocene. The results of hierarchical macro-, meso-, and micromorphological studies of a large assemblage of coatings and the data on the X-ray microanalysis of coatings and composition of stable carbon and oxygen isotopes, as well as on radiocarbon dating of coatings are presented. The synthesis of the results made it possible to reconstruct the main evolutionary phases of cryoaridic soils in the Holocene and landscape and climate changes that induced their alteration. The following climatogenic evolutionary phases of pedogenesis were distinguished: (1) formation of microsparite–micritic dense silica-containing coatings due to short-term fluctuations of the shallow alkaline bicarbonate groundwater level in the semiarid–arid climate; (2) formation of sparitic dense coatings under the slow accumulation of carbonates from low-mineralized bicarbonate water at the higher lake level as compared to the present one in the less arid conditions; (3) the eluvial-illuvial formation of micritic loose coatings under stable automorphic semiarid conditions; (4) formation of Fe-humus coatings in cool humid climate (Al–Fe-humus phase of pedogenesis); (5) the recommencement of the eluvial-illuvial formation of micritic loose coatings under aridization of the last thousand years of the Holocene.
About the authors
M. A. Bronnikova
Institute of Geography
Author for correspondence.
Email: mbmsh@mail.ru
Russian Federation, Moscow, 119017
Yu. V. Konoplianikova
Institute of Geography; Lomonosov Moscow State University
Email: mbmsh@mail.ru
Russian Federation, Moscow, 119017; Moscow, 119991
A. R. Agatova
Sobolev Institute of Geology and Mineralogy, Siberian Division; Ural Federal University
Email: mbmsh@mail.ru
Russian Federation, Novosibirsk, 630090; Yekaterinburg, 620002
E. P. Zazovskaya
Institute of Geography
Email: mbmsh@mail.ru
Russian Federation, Moscow, 119017
M. P. Lebedeva
Institute of Geography; Dokuchaev Soil Science Institute
Email: mbmsh@mail.ru
Russian Federation, Moscow, 119017; Moscow, 119017
I. V. Turova
Institute of Geography
Email: mbmsh@mail.ru
Russian Federation, Moscow, 119017
R. K. Nepop
Sobolev Institute of Geology and Mineralogy, Siberian Division; Ural Federal University
Email: mbmsh@mail.ru
Russian Federation, Novosibirsk, 630090; Yekaterinburg, 620002
I. G. Shorkunov
Institute of Geography
Email: mbmsh@mail.ru
Russian Federation, Moscow, 119017
A. E. Cherkinsky
Center for Applied Isotope Studies
Email: mbmsh@mail.ru
United States, GA, 30602
