Hyperspectral mapping for rock and alteration mineral with Spectral Angle Mapping and Neural Network classification method: Study case in Warmbad district, south of Namibia

摘要

This study observed rock and alteration mineral mapping using HyMap hyperspectral data over the Warmbad district, south of Namibia. The classification result using proposed methods consist of PPI derived from the Spectral Hourglass method and field spectra with the Neural Network classification method show good result for mapping various sericites in pegmatite veins, propylitic alteration of chlorite and epidote, and amphibole in mafic and ultra mafic rock of gabbro, gabbro norite, which are mostly observed in the Warmbad district.