Mineralogical Composition of Particle-Size Fractions of Solonetzes from the North Crimean Lowland
- Authors: Chizhikova N.P.1, Khitrov N.B.1, Tronza G.E.2, Kol’tsov S.A.3, Varlamov E.B.1, Chechetko E.S.1, Churilin N.A.1
-
Affiliations:
- Dokuchaev Soil Science Institute
- Vernadsky Crimean Federal University
- JSC Agrotech
- Issue: Vol 50, No 12 (2017)
- Pages: 1468-1482
- Section: Mineralogy and Micromorphology of Soils
- URL: https://journals.rcsi.science/1064-2293/article/view/224308
- DOI: https://doi.org/10.1134/S1064229317120055
- ID: 224308
Cite item
Abstract
Data on the mineralogical composition of clay (<1 μm), fine silt (1–5 μm), medium silt (5–10 μm), and coarser (>10 μm) fractions of meadow solonchakous solonetzes (Calcic Gypsic Salic Stagnic Solonetz (Albic, Siltic, Columnic, Cutanic, Differentic)) developing from loesslike loam and clay in the North Crimean Lowland are presented. Fractions >5 μm constitute nearly 50% of the soil mass and are characterized by the same mineralogical composition in the entire profile; they consist of quartz, plagioclases, potassium feldspars, and micas (biotite and muscovite). The eluvial-illuvial redistribution of clay in the course of solonetzic process is accompanied by changes in the portion of mixed-layer minerals and hydromicas in the upper part of the profile; a larger part of the smectitic phase is transformed into the superdisperse state. In the eluvial SEL horizon and in the illuvial BSN horizon, the clay fraction is impoverished in smectitic phase and enriched in trioctahedral hydromicas. Upon calculation of the content of clay minerals per bulk soil mass, the distribution of mixed-layer minerals is either eluvial, or eluvial-illuvial, whereas the distribution of hydromicas has an illuvial pattern without distinct eluvial minimum in the SEL horizons. The eluvial-illuvial distribution pattern of clay minerals in solonetzes of the North Crimean Lowland is compared with the distribution pattern of clay minerals in solonetzes of the West Siberian Lowland. Coefficients characterizing differentiation of solonetzes by the contents of particular mineral components are suggested.
Keywords
About the authors
N. P. Chizhikova
Dokuchaev Soil Science Institute
Email: khitrovnb@gmail.com
Russian Federation, per. Pyzhevskii 7, Moscow, 119017
N. B. Khitrov
Dokuchaev Soil Science Institute
Author for correspondence.
Email: khitrovnb@gmail.com
Russian Federation, per. Pyzhevskii 7, Moscow, 119017
G. E. Tronza
Vernadsky Crimean Federal University
Email: khitrovnb@gmail.com
Russian Federation, prosp. Akad. Vernadskogo 4, Simferopol, 295007
S. A. Kol’tsov
JSC Agrotech
Email: khitrovnb@gmail.com
Russian Federation, ul. Akad. Trubilina 128, Krasnodar, 350047
E. B. Varlamov
Dokuchaev Soil Science Institute
Email: khitrovnb@gmail.com
Russian Federation, per. Pyzhevskii 7, Moscow, 119017
E. S. Chechetko
Dokuchaev Soil Science Institute
Email: khitrovnb@gmail.com
Russian Federation, per. Pyzhevskii 7, Moscow, 119017
N. A. Churilin
Dokuchaev Soil Science Institute
Email: khitrovnb@gmail.com
Russian Federation, per. Pyzhevskii 7, Moscow, 119017