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宁陕旬阳坝地区花岗岩类发育。本文主要根据我队历年1/5万矿产普查和前人所获的资料,对区内花岗岩类的成因类型进行初步划分,有错之处,望批评指正。一、区域地质简述本区位于秦岭纬向构造带和新华夏第三沉降带的复合部位。断裂十分发育,有近东西向、北东向、北北东向等,以近东西向和北北东向断裂为主。区内岩浆活动频繁。海西期和印支期岩浆岩广为分布(图1)。由于构造和岩浆活动的影响,区内地层不完整,有泥盆系、志留系、奥陶系、寒武系和震旦系等,以泥盆系为主。其中泥盆系、志留系主要为变砂岩和
Development of granite in Xunyangba area. This article mainly based on my team over the calendar year 150,000 mineral survey and previous data obtained by the region of granite genetic types of the initial division of the wrong place, hope to criticism and correction. First, a brief description of the regional geology The area is located in the Qinling zonal tectonic belt and the new part of the third subsidence zone of China. The faults are well developed with nearly east-west direction, northeast direction, north-north direction and east-west direction and north-north-east direction faults. Magmatic activity is frequent in the area. Hercynian and Indosinian magmatic rocks are widely distributed (Figure 1). Because of the tectonic and magmatic activities, the strata in the area are not complete. There are Devonian, Silurian, Ordovician, Cambrian and Sinian, with Devonian dominated. The Devonian and Silurian are mainly sandstone and sandstone