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临沧花岗岩基呈近南北向分布于澜沧江西侧,北自云县,南至景洪、勐海一带,延长350公里,出露面积近9000平方公里。岩体构造复杂,总貌呈现具有部份侵位的半原地造山花岗岩特征。围岩主要为变质程度不深的澜沧群。东侧为澜沧江大断裂,发育有上古生界至中生界的线状分布的火山岩。 1979年,我组沿景洪——勐海公路,系统的采集了岩基南段花岗岩同位素测试样品。1981年在西德联邦矿产资源研究院同位索实验室,测定了部份样品的Rb——Sr同位素。1981
Lincang granite base nearly south-north distribution in the west of Lancang River, north from Yunxian, south to Jinghong, Menghai area, extending 350 kilometers, exposing an area of nearly 9000 square kilometers. The rock mass is complex in structure with the general appearance of semi-in-situ orogenic granite with partial emplacement. Surrounding rocks are mainly Lancang group with less metamorphism. On the east side of the Lancang River is a large fault with the linear distribution of volcanic rocks from the Upper Paleozoic to the Mesozoic. In 1979, along the Jinghong-Menghai Highway, our group systematically collected granite isotope test samples from the Yanjikan section. In 1981 in the West Federal Institute of Mineral Resources isotope laboratory, determination of some samples of Rb - Sr isotopes. 1981