青海多彩地玛铅锌矿区物化探异常特征  

Characteristics of geophysical and geochemical anomalies in the Duocaidima lead and zinc deposit area,Qinghai

作　　者：赵利[1] 陈根[1] 寇明[1] 李钧[1] 

机构地区：[1]四川省核工业地质调查院,成都610052

出　　处：《矿产勘查》2015年第4期429-437,共9页Mineral Exploration

基　　金：青海省地质勘查基金项目(编号:青国土资勘[2012]87)资助

摘　　要：应用双频激电法在多彩地玛铅锌矿区圈定出了4条激化异常带,其中2条呈现高幅频率、中低电阻率特征,指示存在矿化体;2条呈现高幅频率、高(中高)电阻率特征,主要由矿化带(体)和断裂构造所引起。矿区西龙弄AS13乙3Pb、Ba地球化学元素异常显示两个高值区,进一步圈定出3个异常,异常主元素为Pb,其次为Ba、Cd和Mo,显示了热液活动的特征。在综合分析多彩地玛铅锌矿区物、化探异常特征的基础上,结合区域地质背景、矿区地质(构造)特征,将为矿区明确找矿方向提供依据。Four IP anomalous zones were outlined in Duocaidima lead - zinc deposit area by using dual - frequency induced po- larization survey. Among them, two zones show features of high amplitude - frequency rate and medium - low electrical resistivity, which indicate the existence of hidden orebodies. And, the other two belts show features of high amplitude - frequency rate and high （medium -high） electrical resistivity, which were caused by the mineralized belts or faults. There are apparent geochemical anomalies of As, Pb and Ba elements in the Xilongnong deposit area, two anomalous zones with intensive values were identified and three anoma- lies were outlined. The main anomalous element is Pb, followed by Ba, Cd and Mo, which shows the combination characteristics of hy- drothermal activity. Based on comprehensive analysis of geophysical and geochemical anomalies in combination with regional geological setting and the ore - controlling structures, the prospecting targets were proposed for the further exploration in the deposit area.

关 键 词：多彩地玛 铅锌矿 双频激电法 视幅频率 异常解释 青海 

分 类 号：P618.42[天文地球—矿床学] P618.43[天文地球—地质学]