Lithologic and Structural Mapping Using Aeromagnetic and Ground Radiometric Data in Song Area, N. E. Nigeria

Abstract

This work analyses jointly aeromagnetic and ground radiometric data over Song region of Hawal Basement Complex. The area is marginally located with respect to the Yola Rift, an arm of the Benue Trough. The area comprises of gneiss, migmatite, granitoids and basalt as the main lithologies. Residual magnetic map was produced from the total intensity data using statistical analysis. Both magnetic and radiometric data were contoured using surfer 9 surface mapping software. The tectonic setting of the study area is manifested in complex lithologies and structures which have been observed in the field and reflected in magnetic and radiometric anomalies. NW, NE, E-W, and N-S lineaments have been identified on the magnetic and radiometric maps. These are interpreted in terms of lithological emplacements, fracture and foliation directions in the basement. The magnetic and radiometric data have revealed some features not observed in the field. It is suggested that mapped lineaments would serve as guide in sustaining local quarrying industry in the area.