Geological views on the sandy desertification of the east part of northern China

Land desertification of the east part of Northern China is mainly controlled by the geological backgrounds such as the tecto-sedimentary characteristics, global climatic changes, especially the monsoon current in east Asia. The regional geologic subdivisions of sandy desertification here could be divided into three types, which are termed as the localized type, the windblown type and the coarse-grained desertification type. Localized sandy desertification is mainly distributed over the areas of sands and deserts of which are MuUs Shadi,Horqin Shadi,Hun shandake Shadi and Hulun Buir Shadi,areas of paleochannels which p a ssed through these sands and deserts,the areas in which fluviatile and lacustrine sandy sedimentaries are widely spread,and the areas in which soil is developed on sandy sediments as well. The windb lown sandy desertification is distributed mainly at the edge of above deserts,such as sand-covered loess areas at the south of MuUs Shadi desert.