安徽繁昌紫山岭地区铜铅锌成矿地质条件分析

Analysis of metallogenic geological conditions of copper,lead and zinc in Zishanling area,Fanchang,Anhui Province

繁昌紫山岭地区位于板石岭背斜北西翼至倾伏端之间,有石炭系—三叠系对铜铅锌成矿有利地层,北北东向、北北西向及层间滑脱破碎带发育,岩浆活动强烈,含矿热液充足,成矿地质条件十分有利。文章在分析紫山岭地区地质特征的基础上,对该区1/10000高精度磁法测量圈出的5处磁异常、1/10000土壤地球化学测量发现的多个多元素组合异常区及物化探综合剖面结果进行分析,并给出槽探、钻探工程验证结果,进一步认识了区内地层的含矿性及构造特征。研究结果表明,该区具备寻找热液充填型、层控矽卡岩型铜铅锌多金属矿找矿潜力。

The Zishanling area in Fanchang is located between the northwest flank of the Banshiling anticline to the tip of the dip.There are Carboniferous to Triassic strata that are favorable for copper-lead-zinc mineralization.The NNE,NNW and interlayer detachment fracture zones are widespreadly developed,and magmatic rock activities are common.Based on the analysis of the geological characteristics of the Zishanling area,five magnetic anomalies in the area circled by 1/10000 high-precision magnetic measurement,multiple multi-element combination anomalies found by 1/10000 soil geochemical survey and the comprehensive profile results of geophysical and geochemical exploration were analyzed,and the verification results of trenching and drilling engineering were given,and the ore-bearing and structural characteristics of the strata in the area were further understood.The research results show that this area has the potential to find hydrothermal filling type and stratified skarn type copper-lead-zinc polymetallic deposits.