Extraction of remote sensing mineralization alteration information and delineation of prospecting potential areas based on Crosta technique: A case study of Yichun area in Xiaoxinganling Mountains

Based on the Landsat8 OLI remote sensing data, with ASTER and ALOS data as the interpretation base maps, this study interprets the strata, and linear and ring structures in Yichun area, Xiaoxinganling Mountains, by visual interpretation. Guided by the theory of diagnostic spectra for altered wall rocks, the hydroxyl alteration and ferric contamination anomaly information are extracted with band ratio and principal component analysis(PCA). The alterations in principal components are graded by density slicing. Through comprehensive analysis of remote sensing interpreted faults, ring structures and alteration-mineralization information, potential mineralization areas are delineated from the perspective of remote sensing to provide references for field prospecting.