Abstract
Remote sensing technology can detect alteration information.Choose Danghe-Nanshan district as the study area,based on ETM and ASTER remote sensing data,using principal component transform,mask analysis,threshold segmentation method,ectraction alteration information from the Landsat-7 ETM and forecast possible mineralization area.The method is accurate,effective,eliminating cloud,snow and other interference information,the use of the information obtained with the known mineralization alteration minerals point is very consistent,the method is helpful for extraction of alteration information.
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