Distribution of micas using aster data and field sample in nuri deposit of tibet

Nuri Cu polymetallic deposit locates in south rim of Eastern of Gangdise in Tibet. It is presented for large metallogenic scale and special mineralized combination. Using the ASTER imagery band ratio methods, the content and composition distribution of micas were implemented. And from measuring the spectral of rock and mineral using SVC portable spectrograph, it derived consequence of exists some main altered mineral micas. According to altered mineral spectral wavelength changes near 2200nm position, distribution map of micas is displayed. Through analysis, it is considered that the epithermal center located at the NNE orientation of the deposit center. The result is very important meaning for mineral prospecting.