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Sediment thickness and depth to magnetic sources computations from high-resolution aeromagnetic data over Yola arm of the upper benue and adjoining basement regions, Northeastern Nigeria

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Author Affiliations

  • 1Physics Dept, Federal University Kashere PMB 0182 Gombe, Gombe state Nigeria
  • 2Geology Dept, AkwaIbom state University, MkpatEnin, PMB 1076 Uyo, Nigeria
  • 3Physics Dept, Federal University Kashere PMB 0182 Gombe, Gombe state Nigeria

Int. Res. J. Earth Sci., Volume 8, Issue (2), Pages 1-8, August,25 (2020)

Abstract

The study of high-resolution aeromagnetic data was carried out over Yola arm (Upper Benue) and adjoining basement regions of northeastern Nigeria, so as to determine the sediment thickness and depths to magnetic sources using radially average power spectrum and depth to basement topographic map. Data processing by polynomial fitting was done on the total magnetic intensity mapso as to expose the residual features. Oasis Montaj software (7.0.1) was used to generate radially average power spectrum and basement topography for depth computation. Results show that these diment thickness over the region as showed by the power spectrum is in the range of 0.5-1.8km for the shallow sources and 1.8-4.5km for deep sources. The depth to basement of the region is in the range of 0.2-2.2km for shallow sources and 1.2-3.8km for the deeper sources. The two results agrees to some extent, the numerical values are very much in agreement but they differ in some places. Areas of thick sediments accumulation as shown in this work should be targeted for further exploration as such could possibly harbor petroleum. This suggestion is made in the light of the present move by the federal government to explore for petroleum in the countrys inland Basins.

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