Abstract

The study of the mineralogical composition of sand (0.25–0.10 mm) and coarse silt (0.10–0.05 mm) fractions revealed a significant lithological heterogeneity of soil-forming material in the area of the Zvenigorod Biostation. The domination of ore minerals in heavy fractions (to 42% of grains) and, to a smaller rate, of hornblende and biotite, explains iron accumulation in soil profiles and the brown color of sandy loam soils. This feature, along with the insignificant presence of the clay fraction, enables us to assign texturally undifferentiated soils to the division of iron-metamorphic soils and more differentiated soils to the division of eluvial soils.

中文翻译：

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莫斯科国立大学Zvenigorod生物工作站的粗级分矿物组成特征及其与土壤成因和性质的关系

摘要

对砂（0.25–0.10 mm）和粗粉砂（0.10–0.05 mm）级分的矿物学组成的研究表明，在兹韦尼哥罗德生物站地区，土壤形成材料具有明显的岩性非均质性。矿石矿物的主要成分（占谷物的42％）占主导地位，角闪石和黑云母占主导地位，这解释了土壤剖面中铁的积累和沙壤土的褐色。此功能以及粘土部分的微不足道的存在，使我们能够将质地上未分化的土壤分配给铁质变质土壤，将更多分化的土壤分配给冲积土。