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本工作区位于青藏川滇歹字型构造体系东支,巴塘——哀牢山褶皱带中段西翼(图1、图2)。区内主要地层有中三迭统上兰组、上三迭统歪古村组、三合洞组,均作北北西向展布。一系列巨大的走向断裂十分发育。上三迭世早期火山活动强烈,其中歪古村组发育了一套中酸性火山岩系,南北向延伸达数百公里,明显地受主干断裂控制,作线状产出。一系列火口呈链状分布与火山岩带一致。
The work area is located in the east branch of the Tibetan-Yunnan-Yunnan-Zihe-type tectonic system and west wing of Batang-Ailao Mountain fold belt (Fig. 1 and Fig. 2). The main strata in the area are the Upper Triassic Shanglan Formation, the Upper Triadian Wretched Ancient Village Group and Sanhendong Formation, all of which are distributed north-northwest. A series of tremendous fractures are well developed. During the early Triassic period, volcanic activity was intense. Among them, the Yushuguan village developed a set of intermediate-acid volcanic rock series extending hundreds of kilometers in the north and south direction and was obviously controlled by the main faults for linear output. A series of crater-shaped chain distribution and volcanic rock consistent.