MINERALOGY OF THE SWELL-SHRINK SOILS OF THE STAVROPOL REGION

Citation
Nb. Khitrov et Np. Chizhikova, MINERALOGY OF THE SWELL-SHRINK SOILS OF THE STAVROPOL REGION, Eurasian soil science, 28(10), 1996, pp. 251-264
Citations number
33
Categorie Soggetti
Agriculture Soil Science
Journal title
ISSN journal
10642293
Volume
28
Issue
10
Year of publication
1996
Pages
251 - 264
Database
ISI
SICI code
1064-2293(1996)28:10<251:MOTSSO>2.0.ZU;2-M
Abstract
Analysis of 196 samples has shown that the mineral content of the clay in the Solonchakic and deeply Solochakic soils of the Stavropol regio n includes a smectitic phase (20-50 percent), dioctahedral hydrous mic a (11-50 percent), kaolinite (12-26 percent), chlorite (10-22 percent) , and finely dispersed quartz. The smectitic phase consists mainly of complex unordered mixed-layer formations of several kinds, including a predominance of smectitic mica with a high content of smectitic packe ts, as well as individual smectite usually in the lower horizons. The composition of the smectite packets is discussed in detail on the basi s of K and Li tests.