A Study of the Middle Benue Trough (Nigeria) Based on Geological Application and Analyses of Spectra of Aeromagnetic Data

Likkason, O. K.; Singh, G. P.; Samaila, Nuhu K.

doi:10.1080/15567036.2010.514588

Cited by 15 publications

(14 citation statements)

References 26 publications

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“…The texture analysis also made it possible to improve and identify geologic lineaments such as joints, faults, and lithologic boundaries. Over the past few decades, a number of studies have concentrated on characterizing the structure of magnetic field data (Likkason, 2014;Likkason et al 2013;Likkason, 2011;Adamu et al 2022;Bonde et al 2014;Nwankwo and Shehu, 2015).This is due to the fact that tectonic activity in nature appears as a nearly round shape, and is linked to the crustal framework. These continental crusts were frequently surrounded by structural features that showed subsequent or concentrated zones (Kogbe, 1979).…”

Section: Introductionmentioning

confidence: 99%

Investigation into a deep-rooted crustal framework deduced from potential field data in Cretaceous and Tertiary strata, Sokoto Basin NW, Nigeria

Abubakar,

Likkason,

Abdulganiyu

et al. 2024

SWJ

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The Paleocene sediments from the Sokoto Group, which comprises of the Gamba, Dange, and Kalambaina formations, were covered by Maastrichtian sediments from the Rima Group, which includes the Wurno, Dukamaje, and Taloka formations. High-resolution aeromagnetic and satellite gravity measurements were used to study these sediments. The aforementioned strata correspond to the Cretaceous and Tertiary strata in this research area and are situated in the south-eastern part of the Iullemmeden Basin. Our aim is to determine and explain the horizontal variation in density and magnetization using the whole regional satellite gravity and aeromagnetic data. The deeper magnetic and density sources were scanned using a two-dimensional (2D) radially averaged power spectrum analysis to produce the NE to SW and E to W trending models for the Moho, lower, and upper lithosphere under the study area. The results were further assessed using upward continuation, derivative analysis, and two-dimensional gravity and magnetic modeling. Numerous important structural trends (i.e., NE-SW, E-W & ENE-WSW), have been identified as a result of the vertical gradients for the potential field data. Spectral analysis and Euler deconvolution can be used to calculate the depths to the lower and upper mantle crust boundaries as well as the depth to Moho. The findings of a qualitative analysis point to an intrusion of the Gundumi and Illo Formations that has a northeast orientation as the primary cause of the significant gravitational and magnetic interaction. The differences in the deep-seated crustal structures and mineralized anomalous bodies with depth were visible on anomaly maps with an upward continuation of 5 km, 7 km, 20 km, and 30 km. Quantitatively, the 2D regional models along the selected profiles (L1, L2, L4, L6 and L7) display a typical lithostratigraphic succession of the Gundumi and Illo Formation (Continental Intercalaire, CI) type of crust, which is subdivided into the lower and upper mantle crust as well as the Moho. The sediment thickness by surface depth ranges from ∼4.06 km and ∼23.31 km. The Moho interface, lower and upper mantle crusts, and magnetic crust are all located at depths of around ∼10.23 km. The distance between the local models of the foundation rocks to the north and south of the Sokoto Group was approximately ∼6 to ∼8 km and ∼4.5 km, respectively.

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Section: Introductionmentioning

confidence: 99%

Investigation into a deep-rooted crustal framework deduced from potential field data in Cretaceous and Tertiary strata, Sokoto Basin NW, Nigeria

Abubakar,

Likkason,

Abdulganiyu

et al. 2024

SWJ

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“…These structures can be seen by using magnetic and gravitational anomalies along with other mathematical ltering techniques. For instance, the de nition of density/susceptibility interfaces (sourcedepths) using lters like upward continuation (Kebede et al, 2020), tilt depth (Chen et al, 2016;Salem et al, 2007), power spectral analysis (Likkason et al, 2013), 2D Werner deconvolution (Ku a Sharp, 1995; Mammo, 2012), and 3D Euler deconvolution (Mammo, 2010, Mammo, 2012Keating and Pilkington, 2004), power spectral analysis (Likkason et al, 2013;Mickus et al, 2007Tiberi et al, 2005, 2D Werner Deconvolution (Ku an Sharp, 1995; Mammo, 2012), 2D forward modeling, 3D structural model. The source depth estimation techniques stated above are just a few of the many available techniques.…”

Section: Introductionmentioning

confidence: 99%

Sediment thickness of subsurface anomalous Sources Determined by 2D/3D modeling of Potential field Gravity data: Implications for Sokoto Inland Basin Structures, NW, Nigeria

Abubakar

Likkason

Maigari

et al. 2023

Preprint

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Due to the promising potential for hydrocarbon exploration in Nigeria's inland basin, more and more emphasis is being paid to the structural setting associated with these basins, especially the current Sokoto basin. Lacoste and Romberg's CG-725 gravimeter collected a sizable amount of potential field gravity data for relative measurements in the region, which is used in this work. The depth of the Earth's subsurface was investigated in this study, which also provided information on the most likely process of emplacement for the bodies that gave rise to the anomalous structures in the Sokoto inland basin. The regional field, a plane with a gradient of 0.38 mG/km and an approximate 10° northeasterly dip, was used as a technique for regional-residual separation. The relative amplitudes of the negative Bouguer gravity anomaly in the region range from − 27.38 mGal to -74.88 mGal. In the southern part of the study area, a large positive anomaly with amplitude of 16.2 mGal can be detected on the residual anomaly map. The main techniques for applying enhancement filters include 2D forward modeling, analytical signal and tilt of angle derivative, directional filtering, power spectrum analysis, Werner deconvolution, and 3D inversion. The 2D spectral depth analysis of gravity data along the rift axis (NE-SW) indicates that source depths tend to deepen toward the south. The joint 2D forward modeling of gravity data provided more evidence for this, demonstrating that the top of the basement slopes both in the NW-SE and N-S directions. The 3D gravity model's findings concur with those derived from methods for estimating depth and surface geological properties. Two depth estimates—1.8 km and 2.93 km—that roughly match the locations of two density boundaries were obtained using the gravitational power spectrum analysis. In the up-dip parts of the Taloka and Gundumi-Illo Formations, intrusions were found at depths of 10–20 km and 5–10 km, respectively, according to gravity modeling of the upper crust. The quaternary faults and fractures in the Eocene sediment at Gwandu Continental Terminal are essential for the sediment cover of the regional hydrocarbon system.

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“…He observed that the systems are similar in temporal disposition, architecture, sources, and reservoir rocks, and maybe generation mechanism to those found in Sudan's Muglad Basin and Niger and Chad Republics' Termit Basin. Likkason et al [9] conducted a study on the Nigerian middle Benue Trough based on geological applications and analysis of the aeromagnetic data spectrum. The radial spectrum and the field's matched filtered output are compared, and the results of the plot of the log radial spectrum versus the frequency numbers revealed five discernible linear segments with depths corresponding to magnetic layers ranging from 20.62 km (highest) to 0.26 km (lowest).…”

Section: Introductionmentioning

confidence: 99%

Aeromagnetic Interpretation of Basement Structures and Geometry in Parts of the Middle Benue Trough, North Central, Nigeria

Olatubosun

Wasiu

Abel

et al. 2022

adv. in geol. and geotech. eng. res.

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The research of an analysis of aeromagnetic data collected in the middle Benue Trough in north-central Nigeria is presented. A detailed analysis of basement structures is conducted in order to identify regions with high hydrocarbon potential that is different from those discovered by earlier researchers. Aeromagnetic data were filtered by using the Butterworth and Gaussian filters, transformed by engaging the reduction to the equator technique, and subsequently enhanced. To estimate magnetic basement depths at various places throughout the basin, the Euler deconvolution depth weighting approach was used. Eleven (11) sub-basins with depths ranging from –2000 m to –8000 m were also identified by Euler’s findings. The sub-basins trend in the NE-SW direction while the average sediment thickness is found to be more than 3 km. The extracted structural features indicate areas like Kadi Blam and Kado areas in the southeastern part and Ogoja and Obudu in the southern part of the study area as regions with high structural densities. These areas coincide with the areas delineated as the sub-basins. The cross-sections generated reveal depressions caused by the action of some tectonic activities in the area. This study identified undulating basement topography believed to be due to tectonic activities as well as five areas that are possible targets for hydrocarbon exploration.

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A Study of the Middle Benue Trough (Nigeria) Based on Geological Application and Analyses of Spectra of Aeromagnetic Data

Cited by 15 publications

References 26 publications

Investigation into a deep-rooted crustal framework deduced from potential field data in Cretaceous and Tertiary strata, Sokoto Basin NW, Nigeria

Investigation into a deep-rooted crustal framework deduced from potential field data in Cretaceous and Tertiary strata, Sokoto Basin NW, Nigeria

Sediment thickness of subsurface anomalous Sources Determined by 2D/3D modeling of Potential field Gravity data: Implications for Sokoto Inland Basin Structures, NW, Nigeria

Aeromagnetic Interpretation of Basement Structures and Geometry in Parts of the Middle Benue Trough, North Central, Nigeria

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