黔西北猪拱塘矿区北西向断裂构造演化与控矿

Structural evolution of NW direction faults in Zhugongtang ore district,Northwest Guizhou Province,China

猪拱塘矿床位于黔西北铅锌矿集区内,累计查明铅锌金属资源量327万t,是贵州省近年来发现的首个超大型铅锌矿床。区内铅锌矿体受北西向断裂构造控制,F1、F2以及隐伏F20、F30断层为主要控矿断层。本文对矿区北西向断裂构造的演化过程分析表明,该组断裂不仅是含矿热液的运移通道,也是含矿热液交代、沉淀的场所。北西向断裂、北西向次级断裂及层间断裂是区内有利的成矿构造系统。基于上述认识,本文认为北西向断裂走向及倾向延伸区域,是区内寻找铅、锌、银等多金属矿的有利靶区。

The Zhugongtang deposit is located in the lead-zinc ore clustered area,of northwest Guizhou province,which preserved 3.27 million tons of lead-zinc metal resources.It is the first super-large lead-zinc deposit discovered in Guizhou province in recent years.The Pb-Zn ore bodies in the area are controlled by the NW direction fault structure.F1,F2 and concealed F20,F30 faults are the main ore-controlling faults.By analyzing the evolution process of the NW direction fault structure in the ore district,it is shown that these faults had played as migration pathway for ore-forming hydrothermal fluids and deposition space for ore-forming metals during the mineralization.NW direction faults,NW direction secondary faults and interlaminar faults are favorable metallotectonic systems in this area.According to the opinions mentioned above,it is considered that the strike and dip extension area of the NW direction faults are favorable target areas for the search of Pb,Zn and Ag polymetallic ore deposits.