Structural study of Wamba and Environs, north-central Nigeria using aeromagnetic data and NigeriaSat-X image

Ogunmola, J. K.; Gajere, E.N.; Ayolabi, Elijah A.; Olobaniyi, S.B.; Jeb, D.N.; Agene, I.J.

doi:10.1016/j.jafrearsci.2015.07.028

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…In addition, these variations in structural alignment within the MBT could have resulted from crustal forces transferred via weaker sediments in orientations other than the underlying basement's primary tectonic trend. Some surface outcrops observed during the fieldwork exercise, as well as previous geophysical and remote sensing data [1,26,45,54], substantiate these multiple structural trends. The Benue Trough's alignment was most likely influenced by the NE-SW striking dextral shear zones of the Pan-African age [53,55].…”

Section: Tectonism and Magmatismsupporting

confidence: 60%

Implementing Digital Edge Enhancers on Improved High-Resolution Aeromagnetic Signals for Structural-Depth Analysis around the Middle Benue Trough, Nigeria

2021

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Digital edge detector operations using magnetic derivatives in conjunction with spectra depth analysis were performed on high-resolution aeromagnetic signals to enhance the delineation and interpretation of depth, structural, and intrasedimentary features within the Middle Benue Trough (MBT) of North Central Nigeria, which could serve as a guide for mineral exploration. The derivatives revealed high-amplitude and short-wavelength anomalies over areas underlain by crystalline basement complexes, major volcanic zones, and aggregates of intrasedimentary volcanic and plutonic rocks. Geologic lineaments trending predominantly NE–SW and NW–SE, as well as minor trends of E–W and N–S, suggest that the area has undergone differential stress regimes across geologic time. The spectral depth analysis indicates a two-source depth model. The deep depth ranges from 1.9 to 6.1 km with an average of 3.9 km, whereas the shallow depth ranges between 0.3 and 1.9 km with an average of 0.8 km and is found to emanate from magnetic signals of post-Cretaceous near-surface igneous intrusions as well as other magnetized bodies embedded within the sediments. The spatial distribution of various hydrothermal minerals such as lead–zinc–barite deposits, as well as salt mineralization, is associated with the widespread Tertiary–recent magmatism and governed by pre-existing tectonic structures in the region.

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Section: Tectonism and Magmatismsupporting

confidence: 60%

Implementing Digital Edge Enhancers on Improved High-Resolution Aeromagnetic Signals for Structural-Depth Analysis around the Middle Benue Trough, Nigeria

2021

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“…The analysis and interpretation of remote sensing imagery are determined by the objective of the interpretation (Ogunmola et al, 2015). The term lineament was first used by Hobbs (1904) who defined "lineaments as significant lines of landscape that reveal the hidden architecture of rock basement.…”

Section: Structural Mapping Of Satellite Imagerymentioning

confidence: 99%

Lineament mapping of structural-trend analysis over the Niger-Benue River-confluence and its environs, a case study of North-Central Nigeria

Anthony¹,

Likkasson²,

Maigari³

et al. 2023

dujopas

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Evaluation, analysis and interpretation of aeromagnetic and satellite imagery data acquired over the Nigeria confluence and environs; Northcentral Nigeria were carried out in order to characterise the structural framework of the study area. Fourier domain of digital filtering tools and reduction to magnetic equator (RTE) operations were achieved to enhance the available data’s results. The geomagnetic field of the earth was removed from the aeromagnetic data using the IGRF- 12 model. Results from the 2D radially average power spectrum of the enhanced magnetic data estimate the depth of the magnetic sources as 20m. Several digital image enhancement techniques such as edge enhancement and general contrast stretching were applied to the satellite imagery after which the lineaments extracted from the magnetic data and images were mapped out on-screen using ArcMap 10.8. The RTE map showed a high magnetic intensity values ranging from 33051. 93 nT to 33165.3 nT and trend approximately E -W direction at the eastern and northwestern parts. The digital elevation model (DEM) of the confluence and environs was used to enhance geomorphic features. The structural lineaments orientation obtained from the analysis showed that the primary structural lineaments bearing is NE – SW, ENE -WSW and NNW – SSE and the structural directions derived from the 2D maps are aligned along NE – SW and NW – SE. This conforms to the general trend of structures produced by the Pan African events.

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“…Works have been published employing airborne magnetic data for structures and mineralization [21,1]. Several other works have also been published employing the integration of airborne magnetic and remote sensing data for structural delineations [22,23,24,25,26].…”

Section: Introductionmentioning

confidence: 99%

Surface and Subsurface Structural Mapping of Lokoja Central Nigeria Using Airborne Magnetic and Remote Sensing Data

A. F.,

M.D

2024

AIR

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The main goal of this research is to evaluate the surface and subsurface structural framework of Lokoja and its surroundings using airborne magnetic and Shuttle Radar Topographic Mission (SRTM) data by applying image processing techniques. To explicate our aim, the residual magnetic intensity (RMI) data was reduced to a magnetic pole (RTP) to centre the anomalies above their causative source after which, the data was subject to the first vertical derivative filter and 3D Euler deconvolution method with structural index (SI =1) where the subsurface structures were delineated, using Oasis Montaj software. Four (4) shaded relief images were created with light sources emanating from four different directions to identify linear terrain features in the SRTM data at a solar azimuth of 0° and a solar elevation of 45°. Others 90°, and 135° followed by creating a composite shaded relief image of all four. The PCI Geomatica edge detection algorithm was applied to the composite shaded relief image produced. After thresholding and filtering processes, structural lineaments were extracted from the edges of the image by subjecting it to the line algorithm of PCI Geomatica. ArcGIS v10.7.1 was used to assign geometry to both magnetic and SRTM structures delineated. The resulting structural lineaments were subjected to Rockworks where a rose diagram that depicts structural trends within the study area was produced. The lineaments delineated allow us to decipher that the area is dissected by numerous subsurface and surface linear structures and these lineaments trend predominantly in the NE-SE, WSW-ENE, NW-SE, and NNE-SSW directions. Overlying the lineaments drawn from the pair of data sets showed several sites of structural coincidence that are thought to be structural continuation locations where subsurface fluids such as water will migrate directly to the surface.

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Structural study of Wamba and Environs, north-central Nigeria using aeromagnetic data and NigeriaSat-X image

Cited by 5 publications

References 26 publications

Implementing Digital Edge Enhancers on Improved High-Resolution Aeromagnetic Signals for Structural-Depth Analysis around the Middle Benue Trough, Nigeria

Implementing Digital Edge Enhancers on Improved High-Resolution Aeromagnetic Signals for Structural-Depth Analysis around the Middle Benue Trough, Nigeria

Lineament mapping of structural-trend analysis over the Niger-Benue River-confluence and its environs, a case study of North-Central Nigeria

Surface and Subsurface Structural Mapping of Lokoja Central Nigeria Using Airborne Magnetic and Remote Sensing Data

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