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1地质背景研究区位于云南南涧县太平村(割救母村)附近,构造位置属于红河断裂及其派生巍山断裂右旋走滑作用下所形成的巍山盆地南端。区域构造主要受南部公郎推覆构造带、东部金沙江一哀牢山断裂带及巍山盆地中轴断裂的控制(云南省地质矿产局,1990;李兴振等,1999)。区内的岩浆岩属于喜马拉雅期大佛山岩群。其主要沿莲花山—大佛山背斜核部断裂贯入,岩性以正长斑岩和二长斑岩类为主。区内岩体总体呈北西-南东向展布;岩石
1 Geological Background The research area is located in Taiping Village, Nanjian County, Yunnan Province, where the tectonic site belongs to the southern end of Weishan Basin formed by the dextral strike-slip of the Honghe fault and its derivative Weishan fault. The regional structure is mainly controlled by the southern Langlang nappe tectonic belt, the east Jinshajiang-Ailaoshan fault zone and the Weishan Basin middle-axis fault (Yunnan Bureau of Geology and Mineral Resources, 1990; Li et al., 1999). The magmatic rocks in the area belong to the large Famaoshan rock mass in the Himalayas. It mainly breaks along the core of Lianhuashan-Dafoshan anticline, and the lithology mainly consists of orthorhombic porphyrite and two-long porphyry. The rock mass in the area is generally NW-SW distribution; rocks