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辽宁省清原县下大堡金矿主要为控矿构造,下大堡金矿即赋存于F1、F2、F3三条北西向断裂中。北西向断裂具多期活动的特点,早期为张性断裂,充填有花岗斑岩、石英斑岩、煌斑岩等脉岩;晚期为压扭性。延走向及倾向均呈舒缓波状,平面展布上具膨缩,及分叉现象。断裂规模一般长在50~400m,最长达1150m(F1断裂),宽一般十几厘米至1.5m,倾角40~75°,断裂一般由两条边界明显的断面控制着上下盘的界线及其间的矿化体,断裂带内发育有断层泥、蚀变岩及黄铁矿化硅质脉。北西向断裂多呈斜列式平行展布,断裂带内金矿化较好,为本区主要的导矿和储矿构造。
The Xiaobabao gold deposit of Qingyuan County, Liaoning Province is dominated by ore-controlling structures. The Xiaobubao gold deposit is hosted by three NW faults in F1, F2 and F3. The northwest fault has the characteristics of multi-period activity. Early is Zhang Zhang fault, filled with granite porphyry, quartz porphyry, lamprophyre and other vein rocks; The extension and tendency of extension are soothing wavy, with the expansion of the flat surface, and bifurcation. Fractures are generally 50 to 400 meters in length with a maximum length of 1150m (F1 fracture), generally 10 centimeters to 1.5 meters wide and dip angles of 40 to 75 degrees. Fractures generally dominate the boundary between the upper and lower plates with two clear cross-sections Of the mineralized body, the fault zone development of fault mud, altered rocks and pyrite silicate veins. The NW-trending faults are mostly obliquely paralleled, and the gold mineralization within the fault zone is good, which is the main ore-bearing structure and ore-storage structure in this area.