Aeromagnetic Data Analysis and Interpretations to Investigate Solid Mineral Potential in Part of Northwest Nigeria
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Abstract
Investigation of structures was carryout to identify and delineate potential areas for mineralization within part of northwest Nigeria. Aeromagnetic data covering this area were analyzed and interpreted using different methods for mineralized geologic structures. The total magnetic field data covering this area was reduced to magnetic equator after which several methods and interpretation including, first vertical derivative; horizontal derivative; tilt derivative; analytic signal and center for exploration targeting were applied to the aeromagnetic data. The maxima from FVD, THD and TDR anomalies were used to delineate the magnetic geologic structures using center for exploration analysis technique. The geologic structures with maxima ASA in the SE, Central region and NW parts were the mineralized structures in the study area. These regions correspond with structural contact areas and were identified as structural contact from first vertical, horizontal and tilt derivatives analyses. These magnetic structures and structural contacts were integrated to produce structural map of the study. The structural contacts were predominant at the SE, central region, NW and NE part of the study area. The trend of these structures were in the NE - SW, N - S, E - W and NW - SE made up during Pre-Pan African and Pan African event. The subtle fractures and faults in the study area could influence the failure of foundation due to the flow/settlement in these structures on unbearable load.
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