Mineralization Zones Delineation in Part of Central Nigeria Using Analytical Signal, Derivatives, Downward Continuation and Centre for Exploration Targeting Plug-IN (CET).

Abstract

A digitised aeromagnetic data covering part of central Nigeria was acquired and analysed with the aim of delineating mineralisation zones within the area using analytical signal, downward continuation, second vertical derivative and structural complexity analyses of the CET. From the analysis of analytical signal, the map reveals areas of low amplitude of 0.0024m in deep blue colour around south central portion of the area while the pinkish colour that dots all over the area has an amplitude of 0.2157m. This pinkish colouration concentrated around central portion to the western end of the study area. Application of downward continuation and second vertical derivative filters produces similar maps in which prospective zones of mineralisations were mapped out. These mineralisation zones were seen to be concentrated in areas with high magnetic signal of amplitude 0.2157m. Application of structural complexity analysis due to CET located deposits occurrence favourable zones that coincided with zones mapped out from SVD and downward continuation maps. Structural trends as revealed by CET Plug-IN are NESW, NW-SE, minor E-W and N-S trends