Open AccessMINERALOGICAL COMPOSITION OF ELUVIAL-GLEY ZHELTOZEMS AS EXEMPLIFIED BY SOILS OF THE ARBORETUM IN SOCHI CITY
Author(s) -
Н. П. Чижикова,
I. A. Gurov
Publication year - 2012
Publication title -
bûlletenʹ počvennogo instituta imeni v.v. dokučaeva/bûlletenʹ počvennogo instituta im. v.v. dokučaeva
Language(s) - English
Resource type - Journals
eISSN - 2312-4202
pISSN - 0136-1694
DOI - 10.19047/0136-1694-2012-69-60-76
Subject(s) - eluvium , vermiculite , kaolinite , chlorite , weathering , clay minerals , geology , gleysol , geochemistry , soil water , podzol , mineralogy , composition (language) , horizon , laterite , mica , soil science , quartz , chemistry , paleontology , nickel , linguistics , philosophy , physics , organic chemistry , astronomy
The composition of fine-dispersed fractions (<1, 1-5 5-10 mkm) extracted from zheltozems located in the northern part of humid-subtropical zone in the North-Western Caucasus is represented by clay and accompanying minerals, which have been fixed earlier in weathering crusts and their derivates characteristic of the given natural zone. The clay fraction consists of a set of mixed-layer minerals, in which chlorite-vermiculite and mica-smectite are dominating within the soil profile. Hydromicas of dioctahedric type and kaolinite are subordinates. In the course of soil formation the profile became differentiated according to the content of the fraction < 1 mkm and the composition of minerals in it. In the eluvial part of the profile the individual smectite is absent but hydromicas, kaolinite, chlorite-vermiculite reveal accumulation. Among destruction products the lepidocrocite is segregated in the AYEL horizon to a considerable extent.. The 1-5, 5-10 mkm fractions are evenly distributed, quartz is dominated.