塔里木盆地巴楚地区构造样式与演化

塔里木盆地巴楚地区断裂较发育，可分为３ 组（ 北西向，分布最广泛；东西向和北西西向；北北东向，主要分布于该区东南部） ，主要是基底卷入型断裂，断面较陡，上盘发育断展褶皱和伴生断裂。巴楚地区构造样式可分为盖层滑脱型和基底卷入型。下寒武统泥岩、膏泥岩和下第三系膏泥岩是该区的两套区域性滑脱层，盖层滑脱型构造可分为两种：沿下寒武统滑脱层发育的断展背斜、叠瓦状逆冲断片和沿下第三系滑脱层发育的滑脱型逆冲断块。基底卷入型构造有多种构造样式，包括单斜式断块、“Ｙ”形及反“Ｙ”形断块和背冲式、对冲式断块。巴楚地区构造发育史可分为３ 期：加里东期—海西期，海西晚期，这两期构造形成与中、晚志留世西昆仑早古生代火山弧和塔里木板块碰撞及西昆仑晚古生代火山弧的演化相关；喜山期，构造形成与印度板块同欧亚大陆南缘的碰撞密切相关。图３ 参３（王孝陵摘）

The structural styles and their evolution in Bachu area of Tarim basin.

The structural styles and their evolution in Bachu faulted uplift are discussed in this paper. The faults are well developed in Bachu faulted uplift, and they stretch along NW,EW and NWW , NNE . The formation of local structures is closely related to these faults. The structural styles of Bachu faulted uplift can be classified into two classes: detachment structures and basement involved structures. There are two regional detachment layers, Lower Cambrian and Paleogene. According to the layers on which detachment happens, the detachment structures can be subdivided into two types: one detached on Lower Cambrian detachment layer and the other on Paleogene detachment layer. The basement involved structures include a series of faulted blocks controlled by faults, such as uniclinal block upwarping, Y shape faulted block, reserved Y shape faulted block, recoil faulted block and ramp faulted block. The tectonic evolution in Bachu faulted uplift can be divided into three stages, Caledonian Early Hercynian orogenies, Late Hercynian orogenies and Himalayan orogenies. The structural formation is related to the evolution of Tarim plate and its adjacent plates.