Taking noise attenuation processing to the geophysical EM38 data from Mandamah Area in New South Wales, Australia by using wavelet transformation,then the data after the processing is acquired which have contained useful information and in which noises have been eliminated based on data decomposing and restructuring.Compared processed EM38 data with the abnormal characteristics of Cu element,the mineralization forecast is made.This method is effective in removing noises while retaining the useful information. The practical application result indicates that wavelet-analysis could play a special role in processing geophysical data,gives satisfing results and can be applied not only to the copper mineral deposits but also to other mineral deposits and other geological data.In this sense，this method is universal in application.%利用小波变换对澳大利亚新南威尔士Mandamah地区所测得物探数据EM38进行全局阈值消噪处理,通过分解与重构,从中提取有效信息,去除干扰,得到去噪后的数据.将去噪后的数据与地球化学铜元素的异常特征和已知的铜矿化区域进行分析与对比,推测出该地区的铜矿化预测区.该方法能有效地去除噪声,又不会损失有用信息.实际资料处理结果表明:小波分析方法在物探数据处理中可以起到独特的作用与效果.该方法还适用于其它地质数据和矿床,具有普遍的意义.
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