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前陆冲断带可以分为3种基本类型:弧后前陆型、周缘前陆型和再生前陆型冲断带。相对国外典型前陆冲断带,中国中西部前陆冲断带在构造演化和变形方面具有独特性,属于再生前陆型冲断带,普遍经历了两期逆冲构造变形、或者“伸展-挤压-伸展-挤压”多期构造变形的叠加。中国中西部的再生前陆冲断带多具有“分带、分段和分层”的结构特征,表现出以主干断裂为界往往可以划分为若干个冲断变形带,沿走向方向表现为几个在构造变形上具有明显差异的变形区段,在垂向上由于滑脱层的发育表现出不协调的分层收缩、上下叠置的变形特征。
Foreland thrust belt can be divided into three basic types: the backarc type, the perimeter foreland and the regeneration foreland type thrust belt. Relative to typical foreland thrust belt in China, the foreland thrust belt in central and western China is unique in tectonic evolution and deformation and belongs to reclaimed foreland thrust belt, which generally experienced two stages of tectonic deformation, or “stretching - Squeeze - Stretch - Squeeze ”Multi-stage tectonic deformation superimposed. The reclaimed foreland thrust belt in central and western China mostly has the structural characteristics of “zoning, segmentation and stratification”, which shows that the main fault can be divided into several thrust deformation zones along the strike direction For several deformed sections with obvious difference in tectonic deformation, the stratified shrinkage due to the development of the slipping layer in the vertical direction shows upwards and downwards superimposed deformation features.