Abstract:Altered rock information extraction is one of the important topics in the remote sensing exploration. This paper has proposed a functional technological process, which includes data preparation, information enhancement, thresholding and mapping. On the basis of a study of such means as principal component analysis, band ratio, spectral angle method, this process can surely play an effective role in the prospecting work within important metallogenic belts of western China. Some major problems in current work of this aspect are also discussed.
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