Abstract
Potsash feldspathization is one of the alterations which are closely related with gold mineralization in Hadamengou gold deposit, Inner Mongolia Autonomous Region. Piedmont potassic alteration zone is the product of potsash feldspathization, part of the zone is ore body. In the paper, we utilize Principal Component Analysis and Spectral Unmixing to extract the piedmont potassic alteration zone based on MAIS data. The result demonstrates that after Selective Principal Component Analysis, false color composite of the first, third and seventh principal components and false color composite of the results from Spectral Unmixing and arithmetic operator both achieve good results.
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