一、地质概况先锋盆地位于昆明市区之东北约60千米。盆地之东有南北向小江断裂之西支嵩明-沧溪断裂,西有南北向普渡河断裂,两断裂所夹持的法古-磨腮背斜呈近东西向。背斜的南侧为蟒蛇河断裂(F_1),北侧有代理堡断裂(F_2),这两条断裂具有相同的应力场和形成演化特征。F_1和F_2所夹持的地带于三叠纪晚期发育成先锋聚煤断陷盆地,尤其是背斜南翼以蟒蛇河断 First, the geological overview Pioneer Basin is located in the Kunming City, about 60 km northeast. In the east of the basin there is the Songmian-Cangxi fault of the north-south Xiaojiang fault, the north-south Puduhe fault in the west, and the Fakou-Mogao anticline in the west of the basin in the east-west direction. On the south side of the anticline is the Python River fault (F_1) and on the north side there is the Fort Borg (F_2) fault, which has the same stress field and evolutionary characteristics. F_1 and F_2 clamped by the Triassic in the late Triassic developed into a coal-bearing basin collapse, in particular, the anticlinal southern wing to Python River