“…The resulted components provide accurate lithological discrimination and hydrothermal alteration detection [ 53 , 54 ]. The first three components involve the maximum of geological information and provide the highest variance ( Table 3 , Table 4 ), this is why MNF1, MNF2 and MNF3 were visualized as RGB composite in attempt to differentiate the lithological limits [ 50 , 55 ].…”