Mapping Hydrothermal Altered Mineral Deposits And Iron Oxide Zones Using Landsat-8 OLI Images In The Kabir Koh One To One Hundred Thousand Geological Map, Iran

Evaluating the conventional methods for mapping hydrothermal altered deposits and iron oxide zones by using landsat-8 OLI images in the Kabir koh one to one hundred thousand geological map is the prime target of our study. We used the color composite, band ratio, principal component analysis. The color composite and band ratio methods showed very clearly the hydrothermal altered deposits of clay minerals, iron oxides and ferric oxides around the fumaroles. The principal component analysis also enabled us to represent undoubtedly the altered hydroxyl and iron oxide mineral deposits of this region concentrating around the fumaroles. Finally the target detection method for reference spectral analysis by using EnvI 4.8 detected the representative hydrothermal altered minerals around study area. Therefore, all the methods showed high efficiency for mapping hydrothermal altered mineral deposits and iron oxide zones

Keywords:

Kabir Koh , Hydrothermal Alteration , OLI , Band Ratio , PCA