Recently

the technology

through using remote sensing to classify rock

seek altered belt and to find mine eventually

has developped rapidly. Because vibration of H2O

OH

CO3-2

metal ion and oxide inside rock and mineral yield the great number of sharp and unique spectral absorption features mainly in the region 2.0-2.5 μm

so that research in this aspect is very active. In this paper

the process to obtain and analysis the field spectral data is described using a multiband radiometer which has the same bands with airbrone multichannel IR scanner used at gold mining areas

oil mining areas

etc in Xinjiang

because the effects of OH

CO3-2 in spectra of rocks is obvious

so that the method is very useful in seek altered belt. The spectra of same rocks in different place are similar. The interfere caused by colour of rock surface in 2.0-2.5 um is less than that in visible-near infrared band. The method also have greater potentiality in seek rocks with Fe+3 and rocks with hydrocabon. It also deal with the classfica-tion results for rocks in a gold mining areas arcording to the material mentioned. By variatesspace transformation the correlation between variates and the numbers of variate have been decreased and the correct rate of classfication has reached 95.3%.