论文部分内容阅读
库车坳陷是在地壳或者岩石圈尺度整体挤压作用下,收缩构造变形形成的一个构造单元,膏盐岩层等软弱岩层可能导致滑脱断层发育,并引起盐上和盐下不协调收缩变形,区域挤压作用下一些先存基底断裂带的逆冲位移是控制盐上层冲断褶皱变形的主要因素。运用地震资料、地表露头、钻测井资料以及非地震资料等,对库车坳陷区域大剖面的盐上层、盐下层的构造变形样式进行分析,认为南天山在挤压收缩变形中隆升,诱导盆山过渡带发育基底卷入的高角度逆冲断层,先前基底断层的复活影响了盆地沉积盖层的构造变形,基底断裂与盖层断层组合样式在走向上基本一致,盖层强变形带与基底断裂带上下呼应。
The Kuqa Depression is a tectonic unit formed by the shrinkage tectonic deformation caused by the crust or lithospheric crustal compression. The weak rock formations such as gypsum and salt rock formations may lead to the development of the slip faults and cause uncoordinated shrinkage deformation on the salt and salt rocks, The thrust displacements of some pre-existing basement fault zones under regional compression are the main factors that control the deformation of the upper thrust fold. Based on the seismic data, surface outcrops, drilling and logging data, and non-seismic data, the tectonic deformation patterns of the salt upper and salt subsurfaces in the large section of the Kuqa Depression are analyzed. It is concluded that the southern Tianshan Mountains are uplifted in compression and shrinkage deformation, The high-angle thrust fault induced by the basement in the transitional zone of the basin was induced. The resurrection of the previous basement fault affected the tectonic deformation of the sedimentary cover in the basin. The pattern of basement fault and caprock fault basically coincided with strike. The strong deformation zone of the caprock Basement fault zone echoed up and down.