Abstract
Ablah area is a basin among the deformed and weakly metamorphosed, post-amalgamation volcanosedimentary sequence in the Arabian shield, Saudi Arabia. It is a promising area for some economic deposits. This study aims to construct a detailed geological map and rock unit discrimination of the area, using digital image processing techniques. The satellite digital data comprise Landsat-7 and SPOT-5 are used for regional, reconnaissance, and detailed geological mapping. The high spatial resolution (HR) digital data of SPOT-5 were processed to create a detailed lithologic and structure maps of the study area (1:10,000). The outcomes of the work reflect that the mineralization in the Ablah area (e.g., gold, copper, and associated minerals) are mainly associated with the altered metasediments and metavolcanics. The alteration zones in the Ablah area are aligned in a way controlled by structural lineaments trending NNW-SSE, WNW-ESE, NE-SW, and N-S.