Interpretation of Aeromagnetic data over parts of Bida Basin, north Central, Nigeria.

Abstract

This study focuses on the analysis and the qualitative and quantitative interpretation of aeromagnetic data over the southern part of Bida basin. The study area covers an area of 24,200 km2 located between latitude 80 30ꞌN and 90 30ꞌN and longitudes 50 00ꞌE and 70 00ꞌE. Aeromagnetic data in grid format containing eight sheets were analysed and interpreted. This study employed several magnetic filtering methods to investigate lineaments and other structural features; reduction to the equator, horizontal derivatives, upward continuation, vertical derivatives, analytical signal, and Centre for exploration targeting grid analysis. Depth estimates using Source parameter Imaging and Euler Depth determination method reveal a maximum depth of 4.2 km around Mokwa and batati areas. Shallow sources also exist around pategi, paiko, Izom and Lapai areas with an average depth ranging from 107.74 m to about 514.82 m. A maximum thickness of sedimentation of 4.0 km was obtained along the modelled profile trending NE-SW. The regional fields of the study area have a trend of NW-SE with some minor structures trending in the NE-SW direction. The study area was found to have a good potential for mineral and hydrocarbon exploration.