小波多尺度分解方法在尕林格Ⅱ矿群深部找矿中的应用  

Application of Wavelet Analysis in Deep Mineral Exploration of Ⅱ Mine Group in Galinge Mineral Area of Qinghai

作　　者：朱朝吉 周肇武 张恒磊[2] 刘天佑[2] 

机构地区：[1]青海省有色矿产勘查院,西宁810007 [2]中国地质大学,武汉430074

出　　处：《地质科技情报》2011年第1期71-75,共5页Geological Science and Technology Information

基　　金：青海省科技厅资助科研项目(2009-G-118-02);全国危机矿山接替资源找矿项目(200799084)

摘　　要：尕林格矿区Ⅱ矿群由于地表有近200m覆盖层影响,磁异常呈北西向似纺锤状,形态简单规则,难以再深入分析磁异常特征与深部找矿方向。运用小波多尺度分析与功率谱分析方法得到不同深度磁性体所反映的磁异常特征,发现了小波5阶细节(场源似深度600m)为矿异常特征,由此推断Ⅱ矿群深度500m以下可能存在磁铁矿体。通过人机交互反演进一步解释证实了24线在高程3 050m处有一铁矿体存在,其倾向南西。小波分析与人机交互反演方法等新技术为扩大尕林格矿区远景储量提供了新思路。Because of the 200 m thick overburden in Galinge Mineral area,the mag netic anomaly,which is like spindle-shaped and with the direction north west,i s simple and so it is difficult to make any further analysis of magnetic anomali es and deep mineral prospecting direction.By wavelet analysis and spectral anal ysis on the magnetic anomaly,it is found that the 5th detail of wavelet analysi s is reflected by mine,whose depth may be 500 meters underground.Hence,it is suggested that at the depth of 500 meters,there could be the existence of a mag netite body.2.5D interactive inversion further confirmed that at the depth of 3 050 m at line 24,there exists an iron ore body.Both the wavelet analysis and 2.5D interactive inversion methods provide a new idea for the expansion of longterm reserves in Galinge mineral area.

关 键 词：小波多尺度分解 二度半人机交互反演 磁异常 青海 尕林格 

分 类 号：P631.2[天文地球—地质矿产勘探]