烟台张家金矿弧形断裂构造控矿特征及找矿方向研究

Study on Ore Controlling Characteristics and Prospecting Direction of Arc Fault Structures in Zhangjia Gold Deposit in Yantai City

摘要:

胶西北NNE向断裂构造带弧形控矿断裂系统，直接控制了胶东特大型、大型金矿床及大部分中小型金矿床。张家断裂为胶东东北部NNE向弧形控矿断裂的伴生构造，断裂沿走向、倾向具波状变化，发育有倾斜擦痕，并有厚度0.3～0.5m灰色、灰绿色断层泥。已发现中型金矿张家金矿、小型金矿汪家沟金矿即赋存于该断裂之中。研究发现张家断裂弧形构造沿走向、倾向变化较大的区域为“焦家式破碎带蚀变岩型金矿”成矿有利区域，矿床沿断裂走向大体以2～3km等距分布；在弧形断裂弧顶西侧300～500m为“河西式破碎带石英网脉带型金矿”成矿有利区域，与东侧“焦家式破碎带蚀变岩型金矿”对应分布。

Abstract:

The arc ore controlling fault system with the trend of NNE in the west and north of Jiaodong directly controls super large and large gold deposits and most small and medium-sized gold deposits in Jiaodong area. Zhangjia fault is an associated structure of arc-shaped ore controlling fault with the trend of NNE in the northeast of Jiaodong area. The fault changes wavy along the strike and tendency, develops inclined scratches, and has gray and gray green fault gouge with a thickness of 0.3~0.5m. Zhangjia gold deposit with medium size and Wangjiagou gold deposit with small size have been found in the fault. It is found that the area where the arc structure of Zhangjia fault changes greatly along the strike and dip is a favorable metallogenic area of "Jiaojia type fracture zone altered rock type gold deposit", and the deposits are generally distributed at an equal distance of 2~3km along the strike of the fault; 300~500m in the west of the arc top of the arc fault is a favorable metallogenic area of "Hexi type fracture zone quartz network vein zone type gold deposit", which is distributed corresponding to "Jiaojia type fracture zone altered rock type gold deposit" in the east.