Structural-depth analysis of the Yola Arm of the Upper Benue Trough of Nigeria using high resolution aeromagnetic data

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dc.contributor.authorOgunmola, J.K
dc.contributor.authorAyolabi, E.A
dc.contributor.authorOlobaniyi, S.B
dc.date.accessioned2019-09-20T09:03:22Z
dc.date.available2019-09-20T09:03:22Z
dc.date.issued2016
dc.descriptionStaff publicationsen_US
dc.description.abstractThe Yola Arm is the east-west trending part of the Upper Benue Trough made up of Cretaceous sediments that are Albian to Maastrichtian in age. This work involves interpreting satellite imagery and aeromagnetic data to map out structures within the basin and estimate the depth to the magnetic basement which could be an aid to further exploratory work in the basin. The SPOT 5 imagery covering the basin was processed and interpreted and lineaments extracted from it. The digital elevation model (DEM) of the area was also used to extract the drainage pattern of the area and as an aid in mapping the lineaments that are visible on the surface. The geomagnetic field of the earth was removed from the aeromagnetic data using the IGRF-12 model. The vertical derivative (VDR) enhanced the high frequency and short wavelength components of the data which could be volcanics. The source parameter imaging (Stechnique which works well at all magnetic latitudes and the spectral analysis were applied to the data to estimate the sediment thickness within the basin. A low pass filter with a cut-off wavelength of 1000 meters was applied to the data to remove the high frequency short wavelength component of the data after which the tilt derivative (TDR) was computed to enhance anomalies that may be faults on the underlying basement. The lineaments from the SPOT 5 data show a predominant NNE-SSW, NE-SW followed by the NNW-SSE with a few N-S and E-W trends and the TDR of the aeromagnetic data show a predominantly NE-SW trend which is the predominant trend in the Benue Trough while a few strike in the N-S,NW-SE, and WNW-ESE direction. This suggests that the basin was subjected to several stress regimes. Differential uplift of the basement fault blocks may have given rise to drape folds observed in the overlying sediments. The depths to the magnetic basement range from about 1 km to about 4.3 km with the deepest part in the eastern part of the Basin. The depth analysis indicates that the Cretaceous sediments are thick enough to generate hydrocarbons.en_US
dc.identifier.citationOgunmola, J. K., Ayolabi, E. A., & Olobaniyi, S. B. (2016). Structural-depth analysis of the Yola Arm of the Upper Benue Trough of Nigeria using high resolution aeromagnetic data. Journal of African Earth Sciences, Vol.124, 32-43pp.en_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/5783
dc.language.isoenen_US
dc.publisherJournal of African Earth Sciencesen_US
dc.relation.ispartofseriesJournal of African Earth Sciences;Vool.124
dc.subjectSPOT 5en_US
dc.subjectGISen_US
dc.subjectAeromagnetic dataen_US
dc.subjectFaults/Lineamentsen_US
dc.subjectGeologyen_US
dc.subjectResearch Subject Categories::TECHNOLOGYen_US
dc.titleStructural-depth analysis of the Yola Arm of the Upper Benue Trough of Nigeria using high resolution aeromagnetic dataen_US
dc.typeArticleen_US
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