Abstract
The Lake Natron- Oldoinyo Lengai geothermal area is confined to Natron- Manyara rift, part of the East Africa Rift System in northern Tanzania and characterized by Pliocene through Pleistocene to the recent volcanic events. The area has numerous geothermal manifestations which to large extent remain poorly studied in geothermal resource potential context. The image processing methods; false colour band composite (FCC) and Principal Component Analysis (PCA) transformation are applied to satellite imagery data acquired from OLI sensor to assess the surface hydrothermal alterations for characterizing the hydrothermal water-rock interaction.