The paper gives a simple introduction to he foundamental techniques and methods for the enhancement of composite image

which consists of physical and chemical exploration and geological information. Detailed description has been given individually to the abnormal colours

lineament and circular structure and image features on the multi-geographycal information composite image. We have studied the ore control effect of circular and lineament structure to the multimetal ore

and come to the point that the Xianghualing region is a complex ore control area by circular and lineament structure.Therefore

we build a remote sensing imag model for ore field in the region. Within the circular structure

the northwest lineament crosses the northweast lineament and forms frames that control the metal ore distribution. According to the features of the found deposits and their coherent image

we conclude that there are two symbols for ore looking. The first symbol is the close lineament feature on the image

the second is the circular structure crossing lineament feature on the image. These two symbols are of he significance of indication for ore looking in the granite growing areas in the south of Hunan province. At the end of this paper

two areas expecting to have ore have been determined according to the comprehensive analysis of multi informations

which have grown great effects.