华南及邻区有序变形及其动力学初探

A Preliminary Discussion on Features and Dynamics of Sequence Deformation in South China and Neighboring Areas

龙门山断裂带以东、江南雪峰隆起带以西的华南地区 ,在断裂、褶皱变形等构造形迹上存在非常规律的有序性。其构造形迹 (断裂、褶皱等 )大都沿NE—NNE排列 ,并且变形强度从SE向NW逐渐减弱。这种有序变形规模巨大 ,仅川东的隔挡式褶皱 冲断带规模就超过了著名的侏罗山式褶皱。这种变形的有序性是与基底存在多层次的倾向SE的拆离滑脱面密切相关的 ,它们起始于印支—早燕山期 ,定型于晚燕山—喜马拉雅期 。

From the east of Longmen Mountain fault belt to the west of Xuefeng Mountain fault belt,the structural deformation is well regulated. Structural features, such as faults and folds, are mostly arranged in NE direction, and their deformation intensity weakens from SE to NW in this region. This regulated deformation is considerable in scale, and hence the partition wall style fold-thrust belt in the east of Sichuan is much bigger than the famous Jurassic style folding. The regulated deformation is intimately related to the multi level substrata decollement that inclines southeastward in basement. Such deformation occurred during early Indochina Yanshanian period, and took shape during late Yanshanian Himalayan period, and its dynamic force might have come from the South China plate which moved from SE to NW.