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ASTER Spectral Analysis and Lithologic Mapping in Bangong Suture, Tibet, China

The study applies ASTER imagery for lithologic mapping in Nianqu, Gaize, Tibet, which is a part of the west segment of the Bang suture. According to the mineralogy and lithology of the study area, spectral characteristic of the rock-forming minerals and alteration minerals are analyzed. After resampling the characteristic spectra in to the ASTER spectral resolution, pertinent image processing methods are used to extract the diagnostic features of respective lithology. The results show that the methods and procedures described in this study is applicable to other relevant areas of the Bangong suture.