Determination of Depth to Magnetic Basement over Biu Plateau and Yola Sub-Basin, Northeastern Nigeria, using Source Parameter Imaging (SPI) and Euler Deconvolution Techniques

Abstract

Quantitative analysis of aeromagnetic data covering total area of 48,000 km2on latitude 11.000N to 13.000N and Longitude 9.000E to 11.000E,which corresponds to Basement Complex part of upper Benue trough northeastern, Nigeria was carried out with the aim of estimating the sedimentary thickness using Spectral analysis. Two dimensional spectral analyses of aeromagnetic data using Oasis Montaj was carried out to determine the average depths of magnetic basementover Biu Plateau Basalt and Yola Sub -basin, north east Nigeria.The results revealthe presence of two source depths that is the deeper and shallow source depth. The deeper magnetic sources vary between 900 to 3810 m and the shallower magnetic sources; vary between 340 to 810 m. The deeper sources correspond to the basement topography underlying the area, while the shallower magnetic sources are associated with basic intrusive within the Middle Benue Trough and the adjoining basement formed by the Cameroon Volcanic line. Areas of deeper magnetic basementare potential sites for hydrocarbon exploration within the Benue rift and groundwater exploration on the basement area.