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塔里木盆地西南缘的构造变形是新生代喜山运动的产物,按变形卷入的深度及构造样式可分为两带:南带为前陆叠瓦逆冲-褶皱变形带.基底发生变形;北带为前陆滑脱挤压道冲-褶皱带,以盖层滑脱为主要表现形式。两带的变形受控于统一的应力场,并呈前展式逐渐向道冲带前纷扩展。变形样式表现为断裂及相关褶皱,变形方式自南而北从叠瓦状边冲向滑脱挤压过渡,变形强度自南而北逐渐减弱,反映出应力是自前而北逐渐释放的。应力释放及滑距耗散的方式有:分支断层的发育、断展褶皱作用、分支断层叠置形成双重构造以及上覆褶皱和滑脱褶皱作用等。
The tectonic deformation in the southwestern margin of the Tarim Basin is a product of the Cenozoic Himalayan movement. According to the depth and tectonic style involved in the deformation, the tectonic deformation can be divided into two zones: the southern zone is the foreland sub-wedge thrust-fold deformation zone. The basement is deformed. The northern zone is the foreland slip-extrusion ductile-fold belt, with caprock as the main manifestation. The deformation of the two belts is controlled by a unified stress field, and is gradually expanding to the front of the Tao-Chong zone with a pre-exhibition type. The deformation pattern shows faults and related folds. The deformation mode transits from shingles to slippage from south to north, and the deformation intensity gradually decreases from south to north, which shows that the stress is gradually released from the north to the north. The ways of stress release and slippage dissipation are as follows: the development of branch faults, faulting and folding, the formation of double faults by branching faults and the overlying folds and slipping folds.