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库车坳陷克拉苏构造带发育大量与膏盐相关的收缩构造,其深、浅构造变形不协调具有明显差异性。构造建模表明:克拉苏构造带属于库车坳陷北部强变形带,自西向东具有不同的变形样式。西部大北区段受前缘拜城断裂控制,发育断层规模小的基底卷入冲断叠瓦扇;东部克深区段则受后缘克拉苏断裂控制,发育大位移断层控制的盖层滑脱冲断叠瓦扇。克拉苏构造带基底断裂位移分布具有差异平衡的特点,基底断裂活动对膏盐层厚度及分布具有再调整作用。砂箱物理模拟结果显示,构造变形强度、膏盐层厚度及其分布差异是克拉苏构造带东、西段结构和垂向变形差异的主要控制因素。
There is a great deal of shrinkage structure associated with gypsum salt in the Kelassu structural belt of the Kuqa Depression. There is a significant difference in the uncoordinated deformation between the deep and shallow structures. The tectonic modeling shows that the Kelassu tectonic belt belongs to the strong deformation belt in the north of the Kuqa Depression and has different deformation styles from west to east. The western Great Dabei Section was controlled by the Baicheng Fault on the leading edge and the basement with a small fault size was involved in thrusting and folding fan. The eastern Ke’er Segment was controlled by the trailing edge Kelasu Fault and the caprograde controlled by the large displacement fault developed Thrust stacked fan tile. The distribution of fracture distribution in the base of Kelasu structural belt has the characteristics of differential balance. The basement fault activity has a readjustment effect on the thickness and distribution of the paste salt layer. The results of physical simulation of sand box show that the main controlling factors of the structural deformation and vertical deformation of the eastern and western sections of the Kelasu structural belt are the structural deformation strength, the thickness of the gypsum salt layer and their distribution.