1矿区地质概况位于西秦岭的甘肃省西和-成县(简称西成)铅锌(银)金多金属矿化集中区,是秦岭铅锌金成矿带的重要组成部分。矿集区内累计铅锌金属量超过1400万吨,金金属量超过17吨(邓海军和朱多录,2010)。厂坝-李家沟铅锌矿床位于矿集区北部,是该区规模最大的铅锌矿床。该矿床产于矿田内吴家山复式背斜的次级褶皱——干鱼廊向斜北翼和王家山背斜南翼,黄渚关深大断裂南侧。矿区发育两组断层,一组为 1 Geological Survey of Mining Area The lead-zinc (silver) gold-polymetallic mineralization zone in Xihe-Chengxian, Gansu Province, located in West Qinling, is an important part of the Pb-Zn-Au metallogenic belt in Qinling. The total lead and zinc content in the mining area exceeds 14 million tons and the gold metal content exceeds 17 tons (Deng and Jun Zhu 2010). Changba-Lijiagou lead-zinc deposit is located in the northern part of the ore district, which is the largest lead-zinc deposit in the area. The deposit is produced in the secondary fold of the Wujiashan multiple anticline in the orefield - the syncline to the northwest of the Qianhai corridor and the south wing of the Wangjiashan anticline, and to the south of the Huangzhuguan deep fault. There are two sets of faults in the mining area, one set being