中文摘要：

晚新生代以来，由于青藏高原的隆起，四川盆地周边及盆地内部，发育众多的褶皱变形及逆冲断裂。四川盆地西南缘的雅安-名山地区也发育系列褶皱变形如蒙顶山背斜。根据野外实地调查、DEM及卫星遥感影像的解译，古青衣江的一条古代主干河道在蒙顶山背斜被识别出来，该古河流控制了名邛台地的冲-洪积沉积。伴随古青衣江上游发生河流改道事件，名邛台地也停止发育，一段废弃河道在蒙顶山中被保留下来，并在蒙顶山背斜持续褶皱过程中，河流纵剖面遭受变形。根据名工口台地的ESR测年，可确定古青衣江被袭夺事件发生在312±3．0ka，结合河流纵剖面变形的几何计算，获得背斜开始发育的时间为3．2～3．8Ma，蒙顶山背斜相对于下里向斜的隆升速率为0．46mm／a。研究结果可以限定该地区褶皱构造活动的起始时间、变形速率以及山体的剥蚀速率。

英文摘要：

The Ya＇an-Mingshan area lies in the southwest corner of the Sichuan Basin, where several linear folds including the Mingdingshan anticline occur. A paleo-channel of the Qingyijiang River was identified in DEM and satellite remote sensing images. It controlled the development of an alluvial-fluvial fan named the Ming-Qiong terrace. The upstream of the paleo-Qingyijiang River was captured,and so the Ming-Qiong terrace stopped building. However, one channel of the paleo-river was preserved, and it was then deformed during the rise of the Mingdingshan anticline. The ESR dating shows that the river capture or piracy event occurred in 312.0±3.0ka. It is estimated from deformation of that paleo-channel that the rise of the Mingdingshan anticline began in 3.2 - 3.8Ma. So the rise rate might be 0.46mm/a.