The key point for gold exploration using remote sensing technology is the information extraction of ore-forming structures and the spectral character of the ferroxides and alterated hydrous dinerals. JERS-1 SAR is of great potential in structural extraction

which can be achieved by suppressing the speckled noise and edge enhancement using spatial filters. With the help of principal component analysis of the band or ratio imagery of the landsat TM

the spectral character of alterated minerals can be extracted

while the influnce of the vegetation can be suppressed. Both alteration and structural information can be extracted by the integration of the two above remote sensing data.