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内蒙地区由花岗岩、玄武岩和黄土状沉积物等三种不同母质所发育的暗粟钙土,经理化分析、差热分析和X射线鉴定表明,剖面中颗粒分布状况大致相近,剖面中部微有粘化现象。原生矿物的组成随母质不同而异,但粘土矿物的主要成分都是濛脱?我惩量笪锏某煞植钜旆从沉四钢实牟煌?这种差异在剖面下部愈益显著。各层粘土矿物组成的差异似乎表明,濛脱在干草原条件下,可经复钾作用而演变为伊利石,也可风化为高岭石。
Inner Mongolia area from the granite, basalt and loess sediments and other three kinds of dark parent material development of the dark travertine soil, the chemical analysis, differential thermal analysis and X-ray identification showed that the distribution of particles in the profile is generally similar to the central profile of a slight sticky The phenomenon. The composition of primary minerals vary with the parent material, but the main components of clay minerals are montmorillonite. The differences in the composition of clay minerals in each layer seem to indicate that montmorillonite may evolve to illite by recalcification under the conditions of the steppe and may also be weathering to kaolinite.