内蒙古阿木乌苏地区TM图像褐铁矿化蚀变信息提取研究

The Research of Information Extraction of Hydrosiderite Using TM Image in Amuwusu, Inner Mongolia,China

在利用ＴＭ图像对我国西北干旱地区─—内蒙古阿木乌苏地区的遥感找矿工作方法研究中，特别注意了蚀变信息提取的研究。在热液蚀变信息提取中，引入了主要反映地物波谱信息的饱和度分量，结合波段比值进行定向主组分变换，获得了褐铁矿化蚀变信息。用这个方法所圈定的褐铁矿化蚀变区均已得到了验证，并且发现了新的矿化点。

During the research dealing the mdthod in remote sensing exploration using TM imagein Amuwusu,Inner Mongolia,we paid attention especially to the extraction of hy-drosiderite alteration. The saturation was introduced from the Munsell coordinates whichindecates the spectral feature of geologic bodies,with the result of band ratio,to be under-gone oUected K-L transform to produce the distribution map of hydrosiderite alteration.This method was proved very effective,because all the hydrosiderite regions were provedto be true,and a new ore points were found in one of the extracted hydrosiderite regions.