中文摘要：

通南巴背斜发育于四川盆地东北米仓山冲断构造带和大巴山弧形冲断构造带的构造叠合部位，其形成与演化受到米仓山与大巴山的联合影响，然而目前其变形特征以及变形机制认识尚且不清楚，精细研究通南巴背斜构造几何学、运动学对于揭示背斜成因机制以及认识陆内构造变形具有积极作用。本文以覆盖通南巴背斜的三维地震资料为基础，运用断层相关褶皱理论和平衡复原等方法，精细刻画出通南巴背斜几何学与运动学特征，并建立构造模型，探讨其成因机制。研究表明，通南巴背斜总体具有“东西分段、上下分层、早晚期构造叠加”的特征，具体表现为：1）受控于三叠系嘉陵江组膏盐滑脱层、志留系泥岩局部滑脱层以及前震旦系滑脱层，通南巴背斜分为上、中、下、深4套构造层，表现为多层滑脱变形特征，其中，中部构造层变形强度最大；2）深部（前震旦系）构造楔发育于整个通南巴背斜，其个数和几何学形态的变化直接影响了上覆背斜形态以及分段性背斜高点差异；3）位移沿楔端点向前传递过程中，受到川中刚性基底的阻挡，背斜前翼旋转，形成次级褶皱调节断层；4）通南巴背斜晚期受大巴山向西南推覆挤压的叠加作用，表现为中部构造层在东北段发育一系列双重构造和叠瓦构造，并导致嘉陵江组以上地层被动变形褶皱。

英文摘要：

Tongnanba anticline is located in the eastern part of Micang Mountain front in the north- eastern Sichuan Basin. It is the second largest anticline bearing oil-gas in the Sichuan Basin with comparatively lower prospecting degree than the rest parts in the basin. The NW-SE thrusting from Micang Mountain greatly influenced the origin of Tongnanba structure. Yet, the deformation feature and mechanism is still not fully understood. To discuss the geometry and kinematics of Tongnanba structure is of great value to reveal the origin of the anticline and to future guild oil-gas prospecting. Based on high-quality 3D seismic profile covering most of the anticline, we depict its structural geometric and kinematic feature by employing fault-related- fold theory and balanced restoration, and then present the structural model and discuss the origin of the anticline. Our study shows that the general feature of Tongnanba structure is： 3 segments, 4 structural layers and 1 structural superposition. Specifically, 1） Bounded by 3 detachments： The gypsum salt layers in Triassic Jialingjiang Formation, the mudstone layer in the top of Silurian and metamorphic rocks in the Precambrian serving as a weak detachment, 4 vertical structural layers and multi-detachments deformation system are therefore recognized （i.e., the upper structural layer, the middle structural layer, the lower structural layer and the deep structural layer）, with the middle structural layer being greatest deformed. 2）The deep structural wedges are developed across the entire anticline, the number and geometry of these wedges directly affect the geometry overlying anticline and the difference in different segments. 3） Blocked by the rigid basement in the center of Sichuan Basin, the displacement of the wedge tip is unable to accommodated forward, but have to be accommodated by secondary fold accommodated faults developed by the rotation of the forelimb of the anticline. 4）Tongnanba anticline received NE-SW structural superposition from the thrusting