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该区位于西秦岭东西向构造带的西段,地质构造复杂,矿产种类繁多,地质构造与矿产有着密切关系。因此,对地质构造特征进行探讨具有重要的意义,现依据有关资料提一些看法,供讨论。 一、地质构造背景 秦岭东西向复杂构造带为该区的一级构造,而北东向构造斜列叠加于东西向构造带中,构成了两个沉降带和一个隆起带,自东而西依次为天礼沉降带,通渭-宕昌隆起带和定西-岷县西沉降带(图1)。
The area is located in the western section of the West Qinling east-west tectonic belt with complex geological structure and a wide range of mineral resources. Geological structure and mineral resources are closely related. Therefore, to explore the characteristics of geological structure is of great significance, is based on the information put forward some views for discussion. I. Geological Structure Background The Qinling east-west complex tectonic belt is a primary structure of this area, while the northeast tectonic oblique stack is superimposed on the east-west structural belt, forming two subsidence zones and one uplift zone, from east to west in turn For the day ceremony subsidence belt, Tongwei - uplift belt and Dingxi Dingxi - Minxian West subsidence belt (Figure 1).