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本文泛指的西昌地区包括北起冕宁—越西;南至会理—会东;东起昭觉—巧家;西达盐边—盐源的区域。该区域位于华南台块的最西缘,包括康滇台背斜的中北部、滇桂台向斜的西部边缘及盐源台缘拗陷。近年来,许多研究工作表明,一定类型的岩浆岩组合发育于一定类型的地壳结构的地区中,并与地质构造发育的阶段和构造的性质相联系。这种规律已普遍地被人们承认。西昌地区,尤其是安宁河谷两侧,广泛出露不同时代、不同产状、不同成分的岩浆岩,组成了岩浆杂岩带。另外从地震活动的历史记载和近代记录来看,安宁河谷又是一条地
This article refers to the Xichang area from north to Mianning - Vietnam; west to Huili - will be East; east of Zhaojue - Qiao home; West salt Yanbian - Yanyuan area. The area is located in the westernmost part of the South China block, including the central-northern part of the Kang Diantai anticline, the western edge of the Dian Kwai-Taiwan syncline and the Yanyuan platform margin depression. In recent years, many studies have shown that certain types of magmatic rock assemblages develop in certain types of crustal structures and are linked to the stages of geotectonic development and the nature of the structure. This law has generally been recognized. Xichang area, especially on both sides of the Anning River valley, widely exposed different age, different origin, different composition of magmatic rocks, composed of magmatic complex belt. In addition, from the historical records of earthquake activity and modern records, the tranquility valley is another land