Abstract:

The study area is located in Areletuobie, Xinjiang. The redundant vegetation and cloud may seriously interfere with the discrimination of the minerals with diagnostic features. Crosta technique taken to the image of the study area didn’t acquire good results. As a result, masking technique was undertaken to eliminate the influence of the vegetation and cloud. Crosta technique was taken to the new images to identify the diagnostic features of the hydroxylminerals, carbonateminerals and the iron oxides. The relevant images, for instance, hydroxyl layer from TM1, 4, 5 and 7, were classified by four thresholds, i.e.<μ+1.64 σ-μ+2σ、μ+2σ-μ+3σ and >μ+3σ3. Being treated as remote sensing anomalies the last three groups were endued with special colors and overlapped with the false composite images that were combined with geochemical surveying data through data fusion. The ore exploration targets were delineated by synthetic analyses of multiinformation. Through field work the existences of several altered outcrops were confirmed and a copper deposit was discovered. The validity of the method has been approved.

Key words: Crosta technique, masking technique, mineral spectral features, Areletuobie area, Xinjiang