Abstract: The information of tectonic structure and surrounding rock alteration is extracted from ETM remote sensing data through data amalgamation and image enhancement by ratio transformation, main component analysis and digital elevation model (DEM). According to the image characteristics of linear structures, three structural trends are identified: nearly EW, NE and NW direction. The paper uses fractal theory for remote sensing alteration anomaly extraction, and contrast the result with fault and geochemical abnormal area.