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该区位于新华夏系第三沉降带西缘,属川中褶带与川西褶带交接部位。龙泉山纵贯西部为成都平原以东天然屏障,也是构造分区界线。川西为广袤的第四系复盖,川中基岩广泛出露,构造形迹微弱,且方向散漫不定。龙泉山构造形迹明显,主体褶皱为箱状背斜,两翼走向逆断层发育。一.构造体系划分(一)新华夏系包括龙泉山褶带、成都凹陷等。除有较典型的纵列构造外,尚有与其
This area is located in the western margin of the third subsidence zone of the Neo-Huaxia system and belongs to the junction of the central Sichuan fold and the western Sichuan fold. Longquan Mountain runs through the west as the natural barrier to the east of the Chengdu Plain and is also the boundary of tectonic zoning. The western Sichuan is covered by the vast Quaternary. The bedrock of the Central Sichuan is widely exposed, its structure is weak and the direction is irregular. Longquanshan structural obvious, the main fold is a box-shaped anticline, reverse the development of two wings to the fault. I. Tectonic system division (a) of the New China Department, including the Longquan Shan fold belt, Chengdu depression and so on. In addition to the more typical tandem structure, there are still