摘要
通过阿尔泰山西北山区不同海拔的6个土壤剖面，从土壤的机械组成、底上层矿物、粘土矿物类型和粘粒的化学全量等，分析了其风化特征．研究结果表明，整个山区总体上风化较弱，在粘土矿物类型和粘粒的硅铝铁率比值方面无明显差异粘土矿物都以水云母为主，粘粒的硅铝铁率为2．78～3．37．风化程度的一定差异只表现在山区不同的高度带其土壤表层粘粒含量、X射线衍射峰的高度以及底土层矿物组成等方面在高山带寒冻湿润的条件下，土壤剖面底上层的矿物已产生风化，矿物的崩解使粘粒含量增高。
In this paper 6 soil profiles in different elevation zones in the Altay Mountains are chosen and the mechanical composition of soil, the eroded degree of mineral in the ground layer, the clay mineral through X-ray diffraction pattern, and the silica sesquioxide ratio of the clay particles are analyzed.The results show that, as a whole, weathering of soil was weak and there was no obvious difference in the type of clay mineral and molecular ratio SiO2/ R2O3 of clay particles in different elevation zones. Clay mineral was dominated by hydromica and the silica sesquioxide ratio of the clay particles is 2.78 ~3.37. Only were the differentials of the weathering degree observed at several respects. The content of the clay particles in the surface layer in alpine area was higher than that in lower mountain area, whereas the peak height of X-ray differaction pattern of the main clay mineral was reverse. Because of cold and wet condition in the alpine areas, the eroded degree of the original minerals in the ground layer was stronger than that in the lower mountain areas.
出处
《冰川冻土》
CSCD
北大核心
1999年第2期164-168,共5页
Journal of Glaciology and Geocryology
