Geological Aspects of EMT+ landsat and SRTM Radar Imageries on Parts of Central Nigeria

Abstract

Lithologic and structural interpretation of EMT+ landsat and SRTM radar imageries were carried out for parts of North Central Nigeria bounded by latitudes 9°11'21.80'' N to 11°3'37.20''N and longitudes 7°43'53.00''E to 6°25'50.60''E. Both visual and computer aided interpretation were performed using Arc Gis 9.2TM, MultispecTM, Ilwis 3.4TM and Microsoft Paint. Dendritic drainage pattern dominates the northern part of the study area, and are associated with schists intruded by granites. Rectangular drainage pattern associated with mylonitic quartzites, dominate the South West section of the study area around Zungeru. Annular and braided drainage patterns are associated with resistant migmatites. Undisplaced lineaments on the north of Shiroro Dam indicate joints, while relatively displaced lineaments indicate faults. Lineaments analysis indicates dominant joints trending NNE-SSW. Lineaments are concentrated on the portion defined by 6°20.00'E to 7°40.00'E and 9°10.00'N to 10°50.00'N. Exploration for primary gold mineralization and zones with adequate groundwater potential to meet urban needs should be focussed on this portion. Synforms and antiforms are common in North-West of the study area where lineaments are absent. This reflects the presence of plastic rocks and agrees with widespread outcrops of schists and pelites in this part of the study area.