The study geological Structures by using Remote Sensing and Geographic Information Systems of Al- Sabaloka area ..River Nile state

Abstract

Sabaloka region comprises some of the old basement rocks in Sudan surrounded with Cretaceous sediments forming an inlier, extending between Khartoum and River Nile States. The study area is located inside this inlier between latitudes N 16 00′ -12 00′ and longitudes 33E and 33'00 36'00E. The digital image processing of Landsat 8 (OLI) oriented to enhance the satellite images to discriminate the boundary between the different rock units in the inlier and their dimensions. Also to explain the structural features at macro scale, recognize and analyze them. From colour combinations discriminated the various rock types which is useful in delineating the geological boundaries. From filters image were able to interpret the image easily and obtain information about the drainage systems. At this research interpolate GOCE (The Gravity Field and Steady-State Ocean Circulation Explorer) gravity data used IDW interpolation showed the gravity anomaly high in the northwestern increasing from south to north trend maximum value 49mGal at the region which has igneous rock at these represent high density Rocks, where the northwestern at the 33˚-34˚E ,16˚ 20'N have low gravity this indicate of low density sedimentary, in this area show very low anomaly in the eastern Sudan (31mGal) with faulted as contour show steep gradient at eastern and western for this anomaly.