【摘要】 隐伏矿是当前矿产地质勘查的重点对象。在综合研究冀北地区1∶20万区域示矿信息基础上,优选出锥子山花岗岩体一带的龙头山为找矿靶区,研究显示其具有较好的找矿潜力。1∶5万水系沉积物地球化学测量圈定出11处综合异常;其中H6异常属于矿致异常。H6异常经1∶1万地物化测量显示:Ag、Pb、Zn、Au等元素异常值高,具有外带—中带—内带三级分带;同时具有中低阻高极化的激电异常、蚀变矿(化)带与物化探异常相耦合的特征。通过进行系统地不同尺度地物化测量,缩小了找矿靶区,经工程验证发现了龙头山铅多金属矿床。矿体赋存在北西西向延伸、宽30～60 m的龙头山(F3)断裂构造系统中、产状较陡,赋矿围岩为太古界单塔子群(花岗)片麻岩和晚侏罗世张家口组安山岩,矿石多为细脉—浸染状、致密块状构造,矿床特征与毗邻的小扣花营、牛圈等多金属矿床类似,属于中低温热液脉型铅多金属矿床。最后,根据大比例尺地物化示矿信息特征,厘定了热液脉型铅多金属矿床的找矿标志,建立了地物化综合找矿模型,有利于推进冀北地区的找矿勘查。更多还原

【Abstract】 Concealed ore is the key object of mineral exploration at present. Based on the 1 ∶ 200000 regional prospecting information in northern Hebei province,the Longtoushan prospecting target around the Zhuizishan granite mass has good prospecting potential. 1 ∶ 50000 geochemical survey of stream sediement delineates 11 comprehensive anomalies,among them,H6 anomaly is the mineral-induced anomaly. The results of the 1 ∶ 10000 geological,geophysical and geochemical survey show that anomaly of Ag,Pb,Zn,Au and other elements have high outlier values,with three levels of zones from the outer zone,middle zone to the inner zone. It has the characteristics of low resistance and high polarization induced electrical anomaly. Altered and mineralized zones are coupled with geophysical and geochemical anomalies. Through systematic geophysical and geochemical survey of different scales and the engineering verification,the Longtoushan lead polymetallic deposit was discovered. Orebodies occur in the F3 fault system with NWW extending and 30 ～ 60 m wide. The wall rocks are the archean Dantazi group gneiss and late Jurassic Zhangjiakou group andesite. The ores are mostly vein-disseminated and dense block structured,and the deposit features are similar to the adjacent Xiaokouhuaying deposit,the Niujuan deposit and other polymetallic deposits,belonging to the medium-low temperature hydrothermal vein type lead polymetallic deposit. According to the characteristics of geological,geophysical and geochemical prospecting information,the integrated prospecting model is established and the prospecting indicators of hydrothermal vein type lead polymetallic deposits are determined,which is conducive to advancing the prospecting and exploration in northern Hebei province.更多还原