The paper discusses the application of airborne and spaceborne remote sensing data which are optically and digitally processed to analyse the features of the mineralized geological units on imagery and its mechanism

and also to identify and determine the anomalous area of possibly mineralized geological bodies on imagery. It is discovered that one group of linerments interpreted from image existing in acid alkali-granites in arid area in the western China controls mineralization and contains mineral zones

especially on the airborne color infrared photograph they have excellent exposure. In the meanwhile

the greisen veins were interpreted from photograph

which are the good indications of tin deposit. In 1987

two tin deposit were discoverred during two months field investigation. In the surveying areas

it is found that in the densely intermittent linear image feature zone and in the altered rocks in NE 80?direction exists a outer contact zone between granites and Devonian system marine volcanic-sedimentary clastic rocks

which was regarded as the favourable place for activating and re-enriching gold element in gold-bearing strata by structural and magmatic movement. In August 1988

a gold deposit of structural fractured crevice altered rocks was found in the remote sensing field investigation. It is a valuable achievement of remote sensing technology. The avove examples show that remote sensing technology can rapidly undertake geological investigation and mineral exploration over large area and gain better economic results with very limited data in geologic working area difficult of conditions.