安徽休宁桃溪铅锌矿地质、物化探特征及其找矿潜力  

Geological features,geochemical and geophysical anomaly characteristics and prospecting potential of the Taoxi lead zinc deposit in Xiuning,Anhui Province

作　　者：翁望飞[1] 王德恩[1] 汪永辉[1] 吴冀明[1] 闫峻[2] 张定源[3] 方捷[3] 

机构地区：[1]安徽省地质矿产勘查局332地质队,安徽黄山245000 [2]合肥工业大学资源与环境工程学院,安徽合肥230009 [3]中国地质调查局南京地质调查中心,江苏南京210016

出　　处：《物探与化探》2018年第1期28-37,共10页Geophysical and Geochemical Exploration

基　　金：中国地质调查局整装勘查区找矿预测与技术应用示范子项目(12120114028501;121201004000150017-4);安徽省国土资源科技项目(2014-K-1);安徽省国土资源厅公益性地质工作项目(2014-g-1)

摘　　要：桃溪地区位于安徽省休宁县—歙县金多金属矿整装勘查区中部,具有良好的金多金属矿成矿地质条件。通过专项地质填图发现,桃溪铅锌矿受近EW走向多期活动叠加的断裂控制,其中第3期高角度张性正断层与成矿作用关系密切;矿化体多为脉状,含矿热液于密集裂隙带充填而成。土壤化探圈定有AP18综合异常,呈长轴近EW走向的长条椭圆状,受上述断裂控制,该异常面积2.6 km^2,由Au、Ag、Cu、Pb、Zn多元素套合。高精度磁法测量圈定有M2和M3异常,与化探异常相吻合;激电中梯和激电测深测量结果进一步反映了异常的真实性,并剖析了极化体的深部特征。通过桃溪地区地质及物化探特征的综合分析,认为该地区具有多金属矿勘查的潜力。The Taoxi lead zinc ore deposit is located neighboring the central area of gold polymetallic deposit integrated exploration area of Xiuning-Shexian County in Anhui Province, and it is provided with favorable metallogenic geological conditions. The Taoxi lead zinc ore deposit is controlled by the EW-trending fault with mutiperiodic activity features, and tensional normal fault of the third stage is closely related to the lead-zinc mineralization. The lead-zinc ore deposit was formed by cavity filling through migration of ore fluids into fissure zones, and the orebodies exhibit vein-like form. The geochemical composite anomaly of AP18 obtained by soil geochemical ex- ploration is oval-shaped with EW-trending long axis, and it is controlled by the fault. The geochemical anomaly consists of muhiele- ments such as Au, Ag, Cu, Pn and Zn, and its area is 2.6105 km2. The geophysical anomalies of M2 and M3 were detected by high precision magnetic method, and they are consistent with geological features and geochemical anomaly. The results of IP intermediate gradient and IP sounding prove the actual existence of the anomaly, and also reveal the polarization body characteristics in subsurface. Through comprehensive analysis of geological features and geochemical and geophysical characteristics of the Taoxi area, the authors hold that the area has further ore-prospecting potential for polymetallic deposits.

关 键 词：桃溪铅锌矿 地质特征 地球化学特征 高精度磁法 激电异常 地质填图 

分 类 号：P632[天文地球—地质矿产勘探]