招远黄埠岭金矿断裂构造性质及其控岩控矿作用

Character of faults and their function on rock and ore control in Huangbuling gold deposit,Zhaoyuan

黄埠岭金矿主矿体产于灵北断裂带主断裂上盘次级断裂中,根据7号和10号矿体旁侧小角度斜交剪节理与矿体锐夹角指向的判断,控矿断裂具左旋性质。根据7号矿体旁侧节理统计及共轭剪节理产状的分析,黄埠岭矿区含矿断裂形成的最大主压应力方向为30°∠37°。NE向次级断裂是成矿前煌斑岩脉侵位的重要空间,也是主要的容矿构造。灵北主断裂带则主要扮演了一种导矿构造的作用。

The major gold orebodies occur in the secondary fractures on the hanging wall of main fracture of Lingbei fracture zone. Judged by the direction indication of the included sharp angle between No7 or No10 orebody and the inclined shear joints on side of the orebodies, the ore controlling fracture is characterized by laevorotation. According to the statistics of the joints on side of No7 orebody and analysis on the conjugate shear joint occurrence, the maximum main stress direction for forming ore bearing fractures in Huangbuling ore field is 30＂L37~, NE trending secondary fractures was very important location for emplacement of lamprophyre veins before mineralization, also a major host structure. Lingbei main fracture zone mostly played an ore conducting role in the orocess.