Clay mineralogy in agrochernozems of western Ukraine
- Authors: Papish I.Y.1, Chizhikova N.P.2, Poznyak S.P.1, Varlamov E.B.2
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Affiliations:
- Ivan Franko National University of Lviv
- Dokuchaev Soil Science Institute
- Issue: Vol 49, No 10 (2016)
- Pages: 1161-1173
- Section: Soil Mineralogy and Micromorphology
- URL: https://journals.rcsi.science/1064-2293/article/view/223547
- DOI: https://doi.org/10.1134/S1064229316080111
- ID: 223547
Cite item
Abstract
The mineralogy of clay fractions separated from deep low-humus deep-gleyic loamy typical agrochernozems on loess-like loams of the Upper Bug and Dniester uplands in the Central Russian loess province of Ukraine consists of complex disordered interstratifications with the segregation of mica- and smectite-type layers (hereafter, smectite phase), tri- and dioctahedral hydromicas, kaolinite, and chlorite. The distribution of the clay fraction is uniform. The proportions of the layered silicates vary significantly within the profile: a decrease in the content of the smectite phase and a relative increase in the content of hydromicas up the soil profile are recorded. In the upper horizons, the contents of kaolinite and chlorite increase, and some amounts of fine quartz, potassium feldspars, and plagioclases are observed. This tendency is observed in agrochernozems developed on the both Upper Bug and Dniester uplands. The differences include the larger amounts of quartz, potassium feldspars, and plagioclases in the clay material of the Upper Bug Upland, while the contents of the smectite phase in the soil profiles of the areas considered are similar. An analogous mineral association is noted in podzolized agrochernozems on loess-like deposits in the Cis-Carpathian region of the Southern Russian loess province developed on the Prut–Dniester and Syan–Dniester uplands. The distribution of particle-size fractions and the mineralogy of the clay fraction indicate the lithogenic heterogeneity of the soil-forming substrate. When the drifts change, the mineral association of the soils developed within the loess-like deposits gives place to minerals dominated by individual smectite with some mica–smectite inter stratifications, hydromicas, and chlorite.
About the authors
I. Ya. Papish
Ivan Franko National University of Lviv
Author for correspondence.
Email: igorpapish@gmail.com
Ukraine, ul. P. Doroshenko 41, Lviv, 79000
N. P. Chizhikova
Dokuchaev Soil Science Institute
Email: igorpapish@gmail.com
Russian Federation, per. Pyzhevskii 7, Moscow, 119017
S. P. Poznyak
Ivan Franko National University of Lviv
Email: igorpapish@gmail.com
Ukraine, ul. P. Doroshenko 41, Lviv, 79000
E. B. Varlamov
Dokuchaev Soil Science Institute
Email: igorpapish@gmail.com
Russian Federation, per. Pyzhevskii 7, Moscow, 119017
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