广西河池五圩矿田箭猪坡铅锌锑矿地质特征与成矿规律

The geological characteristics and metallogenic regularity of Jianzhupo Pb-Zn-Sb deposit in Wuxu ore field,Guangxi

箭猪坡铅锌锑矿位于江南古陆南缘、右江再生地槽北部边缘的丹池多金属成矿带上。矿区出露地层以泥盆系泥岩、泥灰岩、砂岩为主。地区构造是由NNW走向呈弧形展布的压扭性构造形迹组合而成,在扭裂带产生的部位,形成矿床的构造形态。包裹体及同位素分析矿床属中低温热液裂隙充填矿床,隐伏的花岗岩为该区岩浆后期热液多金属矿床成矿提供物质来源。矿床形成于统一的构造成矿场与构造应力场,矿体侧伏规律一致,铅锌锑矿化带产于NNW向张扭性断裂构造剪切带内,矿化作用的方式以热液充填为主,在裂隙网络系统较发育而复杂地段铅锌锑矿化强。主矿体在延伸方向上未控制,随着深度的增加矿化元素的组合发生变化,且在深部存在有似层状矿化体,这为该区深、边部找矿提供了重要信息和指向。

Jianzhupo Pb-Zn-Sb deposit is located in the southern edge of the southern part of the Jiangnan ancient land and also the Nandan-Hechi poly-metallic metallogenic belt in northern edge of the regenerative geosyncline in Youjiang.There exist stratum with Devonian mudstone,marl,sandstone as the main component in mining area.Regional structure is composed of NNW trending transpressional structural which is curved distribution.In the parts of the torsional crack zone comes into being form the structural form of the deposit.Analysis of inclusions and isotopes showed that the deposit was medium and low temperature hydro-thermal fissure filling deposit.The concealed granite provided material source for the mineralization of late magmatic hydro-thermal poly-metallic deposit.The deposit was formed in a unified structure of mines and tectonic stress fields,and the lateral voltages of orebodies are the same.The lead-zinc antimony mineralization zone occur in the north to West torsional fault structural shear zone,and the mineralization was carried out by hydrothermal filling.Mainly,Lead zinc antimony mineralization is strong in the more developed and complex crack network system.The extension direction of the mother-lode has not been controlled.As the depth of mining increases,the combination of mineralization elements changes,and there are layered mineralized bodies in the deep.This provides important information and direction for the deep and edge prospecting in this area.