(一) 朱家坝山字型构造的地质概况朱家坝山字型构造位于汉南隆起的东南端,北接秦岭纬向构造带,南邻四川盆地沉降带,东有巴山歹字型构造,西为龙门山隆起褶带。区内出露着一套完整的震旦亚界火地垭群地层,其上覆有震旦统灯影组及下寒武统郭家坝组盖层。当时的岩浆、火山活动较为活跃,因此本区的基性、中性、酸性岩浆或火山岩颇 (I) Geological Survey of Zhujiaba Mountain Font Structure The Zhujiaba Mountain Figuration is located at the southeastern end of the Hannan Uplift, to the north of the Qinling Zonal Structure Belt, to the south by the subsidence zone of the Sichuan Basin and to the east by the Badsha character structure West Longmenshan uplift fold belt. The area is exposed with a complete set of Sinian sub-region Hudiadi Group, which is covered by the Sinian Dengying Formation and the Lower Cambrian Guojiaba Formation. At the time of the magma, volcanic activity is more active, so the area of ​​basic, neutral, acidic magma or volcanic quite