Because the geomechanical environment in the northeastern area of Sichuan basin is complicated and unstable,the combination of structural features is special,especially the planar structural feature.

• 四川盆地东北部由于力学环境复杂且不稳定,因而形成了较为特殊的构造形迹组合,特别是其在平面上构造形迹变化更加特殊。