小波分析在物化探剖面数据处理中的应用  

Application of wavelet analysis on data processing of geophysics and geochemical profile

作　　者：吴冀明[1] 吴磊 胡江 WU Jiming;WU Lei;HU Jiang(No.332 Geological Team,Anhui Bureau of Geology and Mineral Resources Exploration,Huangshan 245000,Anhui,China)

机构地区：[1]安徽省地质矿产勘查局332地质队

出　　处：《矿产与地质》2019年第2期325-329,共5页Mineral Resources and Geology

基　　金：安徽省地质矿产勘查局“安徽省徽州区伊坑铅银多金属矿普查项目”(编号:2013-06)资助

摘　　要：文章简要介绍了小波分析的原理和流程。对磁法剖面数据进行小波转换处理,得到一系列细节数据,通过功率谱法求得各阶细节场埋深,利用Surfer软件绘制磁异常断面图。从磁异常断面图上了解磁性体剖面特征,较之传统的利用切线、割线、渐近线等定量或半定量法,求取磁性体的埋深,根据异常曲线的陡缓或上下延拓的结果,判断场源体的倾向,可以更直观地了解地质体剖面形态,获取更多、更精确的几何参数,为后续工作提供更充分更可靠的依据。另外,利用小波分析对化探剖面数据进行了处理,得到的各元素化探异常剖面图,可以大致判断是背景场还是矿致异常,以及矿体矿化带的剖面产出状态,能更好地为钻孔布置提供依据。This paper briefly introduces the principle and process of wavelet analysis.In this study,we had the magnetic profile data wavelet transformed,got a series of detailed data.Then by means of the power spectrum method,got the depth of field for each order details of the processed data.In last processing,made the magnetic anomaly profile with the Surfer software.Compared with the traditional method-to which the burial depth of the magnetic body is obtained by quantitative or semi-quantitative methods such as tangent,secant,and asymptote,the magnetic body section in the magnetic anomaly profile with wavelet analysis data processing can reflect more intuitively of the geological body-judged by the anomaly curve steep or slow or by the result of the up-down continuation,and obtain more precise geometric parameters-judged by the tendency of field source body,providing fully reliable basis for the follow-up work.In addition,we also had the geochemical anomaly profile data wavelet transformed,the geochemical anomaly profiles got by wavelet analysis data processing can roughly discriminate ore causing anomaly from the false ones,and even to get the occurrence state of the ore bodies or mineralized belt,providing a better guidance for drilling holes arrangements.

关 键 词：小波分析 磁异常断面图 几何参数 磁性体 

分 类 号：P631.2[天文地球—地质矿产勘探] P632[天文地球—地质学]