名山—洪雅地区浅部构造层中褶皱和断层的初步研究

A preliminary study on the folds and faults in the shallow structural layers of Mingshan—Hongya area

四川名山—洪雅地区位于四川盆地西缘,是扬子板块的一部分,位于北东向龙门山构造带的东侧及川滇南北构造带的北段,一级大地构造单元属扬子地块西部,二级构造单元位于四川盆地西部的川西前陆盆地,西与青藏板块毗邻;龙门山构造带为两者之间的推覆结合带,构造运动较为活跃。名山—洪雅地区出露的浅部构造主要为中新生代的褶皱和断裂,其特征以开阔平缓的褶皱和浅层断裂为主。

Sichuan Mingshan--Hongya area is located in the western margin of the Sichuan basin, is a part of the Yangtze plate, located in the North East to the Longmen shah tectonic belt of the East and the Sichuan Yunnan north-south tectonic belt of the northern section, a tectonic unit belongs to the Western Yangtze block, two tectonic units located in the west of Sichuan basin, Western Sichuan foreland basin, and the West Qinghai Tibet plate adjacent to the Longmenshan tectonic belt; thrust between the two combined with tectonic movement is active. The shallow structures in the Hongya area are mainly Meso Cenozoic folds and faults, which are characterized by open gentle folds and shallow faults.