Abstract:

Based on surveyed results of the soil forming environment and the soil properties,this paper analyzes the clay constituent of the typical soils in the study area,the content of major elements in the clay,silt and soils.The results show:the major secondary minerals are montmorillonite ,illite and chlorite, the chemical weathering processes of the soil minerals include the desalting, stagnant oxidation reduction and very weak desilicification.