内蒙哈达门沟金矿区山前钾化带遥感信息提取

钾长石化与内蒙哈达门沟金矿金成矿作用关系密切。矿沤山前钾化带是钾化蚀变的产物，局部地段构成矿体。利用ＭＡＩＳ成像光谱数据，运用了选择主成分分析法、混合像元分解技术进行信息提取，结果发现第一、三、七主成分的假彩色合成图像和混合像元分解后再作算术运算的假彩色图像均清晰显示了山前钾化带。

Remote Sensing Extraction of Piedmont Potassic Alteration Zone in Hadamengou Gold Deposit District, Inner Mongolia Autonomous Region

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.