Predicted reconstruction of the profile distribution of minerals according to the content of the stable component in the crust light solonetz of dry-steppe zone in the south of Russia

• Main Authors: E. B. Varlamov, N. A. Churilin, A. E. Kaganova
• Format: Article
• Language: Russian
• Published: V.V. Dokuchaev Soil Science Institute 2021-01-01
• Series: Бюллетень Почвенного института им. В.В. Докучаева
• Subjects: clusters minerals; clay minerals; к-feldspar; quartz; mixed layer minerals; illite; chlorite; kaolinite
• Online Access: https://bulletin.esoil.ru/jour/article/view/550

On the basis of detailed, conjugated, qualitative and quantitative analysis of clay and clastogenic minerals of the crust solonetz of the Volga region, the profile composition of minerals is calculated according to the content of a stable component. At the same time, the initial mineralogical homogeneity of the soil profile, determined by the method of a stable component – the content of К-feldspar in the profile, was adapted. Soil density indicators were not involved in the calculations. Profile calculations of minerals were carried out at the level of losses and increases of their percentage in genetic horizons relative to the rock, expressed in kg/100 kg of rock. Design values for clay minerals – negative in suprasolonetz and positive – in solonetz horizons. For clastogenic minerals, negative design values are set in suprasolonetz, with a maximum decrease in solonetz gori-umbrellas, and positive in accumulative-carbonate horizons. The calculated values of minerals and masses of the silicate part allowed establishing the deep development of the soil profile, which was revealed by negative values of the mass of clastogenic minerals and an excess mass of clay minerals in the illuvial part of the profile with respect to potassium feldspar. The accumulation of illite in the surface horizons is explained both by the illitization process and by the significant physical crushing of mica minerals of large fractions to the size of silty particles. The lithological heterogeneity of the profile affects the distortion of the calculation results. Calculated model of substances is formed in solonetz profile by real distribution of mineralogical components of eluvial-illuviation process.