Integrated interpretation of dual frequency induced polarization measurement based on wavelet analysis and metal factor methods  

基于小波分析和金属因子的双频激电综合解释(英文)

作　　者：韩世礼[1,2] 张术根[1,2] 柳建新[1,2] 胡厚继[1,2] 张文山[1,2,3] 

机构地区：[1]中南大学有色金属成矿预测教育部重点实验室,长沙410083 [2]中南大学地球科学与信息物理学院,长沙410083 [3]中色金地资源科技有限公司,北京100012

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第5期1465-1471,共7页中国有色金属学报（英文版）

基　　金：Project(41174103)supported by the National Natural Science Foundation of China;Project(2010-211)supported by the Foreign Mineral Resources Venture Exploration Special Fund of China

摘　　要：In mineral exploration, the apparent resistivity and apparent frequency （or apparent polarizability） parameters of induced polarization method are commonly utilized to describe the induced polarization anomaly. When the target geology structure is significantly complicated, these parameters would fail to reflect the nature of the anomaly source, and wrong conclusions may be obtained. A wavelet approach and a metal factor method were used to comprehensively interpret the induced polarization anomaly of complex geologic bodies in the Adi Bladia mine. Db5 wavelet basis was used to conduct two-scale decomposition and reconstruction, which effectively suppress the noise interference of greenschist facies regional metamorphism and magma intrusion, making energy concentrated and boundary problem unobservable. On the basis of that, the ore-induced anomaly was effectively extracted by the metal factor method.在矿产勘查中,人们常应用电阻率和极化率参数来解释激电异常。当地质体和激电异常较为复杂时,利用这些参数就难以对异常源的性质进行合理解释,还可能推断出错误结论。采用小波处理法和金属因子法综合解释阿迪布拉达矿区复杂地质体的激电异常,选择db5小波基对激电数据进行二尺度分解与重构,较好地压制了绿片岩相区域变质和岩浆侵入的噪音干扰,且其能量较集中,边界问题不明显。在此基础上利用金属因子法有效提取了激电矿致异常。

关 键 词：dual frequency induced polarization method wavelet analysis metal factor Arabian-Nubian shield volcanogenic massive sulfide deposit 

分 类 号：P631.3[天文地球—地质矿产勘探]