一、地质概况金川矿区位于阿拉善台块南部边缘隆起区,河西走廊东部龙首山北缘与潮水盆地相毗连处。隆起的南北两侧发育两条区域性大断裂,长数百公里,走向北西,构成区域主要构造线方向,并控制了该区的地质发展。矿区正处于隆起北侧区域性大断裂(编号F_1)附近。区内岩石主要是前震旦纪深变质岩以及与频繁的岩浆活动有关的起基性岩和花岗岩。在漫长的地质年代中,该区经历了多次构造变动,致使矿区构造十分复杂,其中近东西向 First, the geological overview Jinchuan mining area is located in the southern edge of the Alashan uplift area, the eastern margin of the first west of the Hexi Corridor and the tidal basin adjacent to the junction. Two large regional faults are developed on both sides of the uplift. They are hundreds of kilometers long and go northwest, forming the main tectonic line in the area and controlling the geological development of the area. The mining area is in the vicinity of a large regional fault (No. F_1) on the northern side of the uplift. The main rocks in the area are pre-Sinian deep metamorphic rocks and basic rocks and granites associated with frequent magmatic activities. In the long geological years, the area experienced many structural changes, resulting in a very complex structure of the mine, in which the near east-west