309队1957年至1958年初普查找矿工作都在滇小地区进行。这些地区的大地构造单元属于张文佑划分的华南地块,康滇台背斜与横断山块段带接壤区,这些地区前人所作的工作很少,出露地层大多数是三叠紀、侏罗紀地层,旧资料的记载矿产不多,其他地质情况也记载很少。解放后地质部524队及昆明勘探公司307队在这些地区都进行过工作,認为沒有希 309 team 1957 to early 1958 census prospecting work in small areas in Yunnan. The tectonic units in these areas belong to the South China block divided by Zhang Wanyou. The junction of the Kang-Dian-Tai anticline and the Hengduan Mountains block has little work in these areas. Most of the exposed strata were Triassic and Jurassic Records of the old strata and old data are few and few other geological conditions are recorded. After the liberation of the Department of Geology 524 teams and 307 Kunming prospecting team in these areas have been working, that there is no hope