渣滓溪大型锑矿的控矿构造与成矿作用

渣滓溪大型脉状充填锑矿床主要产于区域性2条NE向逆冲断层所挟持的抬升断块内,矿脉均赋存于矿区NWW向F3导矿断层上盘成组成带分布的次级NW-NWW向扭性断裂内。构造的特点是,先在反扭挤压条件下形成,尔后顺扭上隆,在引张条件下张开和充填。研究表明,不同级次的构造彼此间具有良好的连通性,组成一个复杂的构造网,促使矿液上升、分配和沉淀,并逐级逐次地控制着矿床、矿脉和矿体的成生与分布。成矿具有沿倾向发育较深、侧伏延伸和柱状富集的特点。构造动力成矿作用是形成渣滓溪锑矿床柱板状矿体垂向延深超千米的主要因素。

The ore-controlling structure and metallization of the Zhazixi large size antimony deposit

The Zhazixi large size fracture-filling vein type Sb deposit is located in a uplift block held by 2 regional NE thrust faults. Ore veins all occur in the sub-scale NW-NWW pressure-shear faults which are distributed in groups or zones at upper plate of the ore-conductive NWW fault F₃. The structure evolved in sequence:sinistral pressure shear-dextrral tension-open-filling. The different scale faults connect with each other as a complex network. Ore fluid moved up along and partioned into and precipitated within them thus formation and distribution of the ore deposit, vein and body are controlled by the different scale faults. The ore is characterized by deeper development along dip, extension along pitch and column enrichment. The structural dynamics is the main factor of more than 1000 m vertical extension of tabulate ore body to depth in the Zhazixi Sb deposit.