一、腾冲地区地质、水文及地貌概况 腾冲地区位于欧亚板块的边缘部份。东以瑞所一泸水大断裂为界,西以摩谷克断裂为界。 区内出露的地层有上古生界变质岩系及新生界第三系砂、砾岩系;侵入岩有燕山期和喜山期的花岗岩类,以及第三纪和第四纪的英安岩和玄武岩类。区内自新生代以来,火山活动很强烈。各类火山约80余 First, Tengchong geology, hydrology and geomorphology Overview Tengchong area is located in the edge of the Eurasian plate. East to Switzerland by a large water fault Lushui boundaries, the west Moguk fracture. The strata exposed in the area include Upper Paleozoic metamorphic rocks and Neozoic Tertiary sand and conglomerate series, intrusive rocks with Yanshanian and Himalayan granitoids, and Tertiary and Quaternary dacite And Basalt. Volcanic activity has been very strong since the Cenozoic in the area. About 80 various types of volcanoes