Estimation of sedimentary thickness using spectral analysis of aeromagnetic data over Otukpo and Ejekwe areas of the lower Benue Trough, Nigeria

Asielue, K. O.; Ugwu, G. Z.; Ikeh, J. C.

doi:10.5897/ijps2019.4794

Cited by 2 publications

(3 citation statements)

References 29 publications

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“…The map shows preferential enrichment of Uranium to Thorium dominantly at the western part of Otukpo and at the eastern part of Ankpa. The rocks in the Otukpo area were identified as sandstones and shale, which agrees with the geology of the Lower Benue Trough (Reyment, 1965;Ofoegbu, 1985;Obaje, 2009;Asielue et al, 2019). Fig.…”

Section: Resultssupporting

confidence: 77%

“…Most of the geophysical works carried out in the basin employed airborne magnetic investigations for spectral depth or sedimentary thickness determinations (Igwesi & Umego, 2013;Ike et al, 2017;Alasi et al, 2017;Ugwu et al, 2018;Asielue et al, 2019;Okoro et al, 2021). Hence, an aeroradiometric investigation of the area is important in order to evaluate the mineralization in the area from the relative abundance of these three radionuclides of Uranium, Thorium and Potassium.…”

Section: Introductionmentioning

confidence: 99%

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Interpretation of High-Resolution Airborne Radiometric Data Over Part of Lower Benue Trough, Nigeria

L.O.,

G.Z.,

G.E.

2023

African Journal of Environment and Natural Science Research

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Airborne radiometric data of part of Lower Benue Trough of Nigeria were interpreted quantitatively to determine the relative abundance of natural radioactive elements of Uranium (U), Thorium (Th) and Potassium (K) in the area. The observed count rate for Uranium, Thorium and Potassium in the study area were 0.8−6.8 ppm, 4.3−23.2 ppm and 0.09−0.63 % respectively. A ternary image of the radio-elements showed that the northern parts of Dekina and Soko have low concentrations of the three radionuclides whereas high concentration of the three radionuclides were noted at the northern part of Angba, southern part of Dekina and the western part of Ankpa. The ternary map also showed that Potassium in comparison to Uranium and Thorium in the study area is more abundant around the Angba area. The result of the radioelement maps and radiometric ratio maps revealed the presence of shale, feldspar, gabbro, granite and amphibolite in the study area. These mineral deposits could serve as raw materials for industries in Nigeria if harnessed.

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Section: Resultssupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Interpretation of High-Resolution Airborne Radiometric Data Over Part of Lower Benue Trough, Nigeria

L.O.,

G.Z.,

G.E.

2023

African Journal of Environment and Natural Science Research

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“…They concluded that this part of the Lower Benue Trough may not hold promise in terms of hydrocarbon accumulation. Other investigations in the study area includes; geological investigation for minerals deposit (Asielue et al, 2019;Uzuakpunwa, 1774;Olade, 1975;Hoque, 1984,). Structural features which control the anomalous mineralization have also been delineated by many researchers (Olade, 1976;Ofoegbu, 1984).…”

Section: Introductionmentioning

confidence: 96%

Determination of sediments thickness in part of Lower Benue Trough, Nigeria, from the residualization of aeromagnetic data: Implication for diversification of the Nigerian economy

Okwueze¹,

Okiwelu²,

Akpan³

2020

Appl. J. Phys. Sci.

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Aeromagnetic data were used in the study to determine the sediment thickness in the Lower Benue Trough. To achieve the objectives of the study, geophysical techniques were employed to analyze four aeromagnetic maps on a scale of 1:100,000, covering parts of the Lower Benue Trough. These include map merging, polynomial fitting, directional derivatives and forward modeling. Nine (9) profiles were modeled to determine sediment thickness, presence of possible intrusives and the subtle structural features and their trend within the study area. Results from this study revealed the existence of many intrusives which were majorly granite and basalt rocks which suggests complex tectonic events which accompanied the evolution of the Benue Trough. Lineament orientation revealed is majorly NE-SW direction and other directions were NW-SE, E-W and N-S. A sedimentary thickness ranging from 7 to 10 km were suggested by a 3D forward modeling, and this estimated depth did not coincide with an average of 5 km suggested by earlier researchers. Huge variations within the basement complex are however induced by the presence of horst structures as well as graben and this is profound within the depocenters where sedimentary pile is thicker. Magnetic sources within the sediment in Abakiliki, Udi and Nkalagu areas have potentials for hydrocarbon accumulation due to the thickness of the sediments in these parts of the study area. However, Bansara area reveals the presence of lots of intrusives, indicating high geothermal regimes that may not be favourable for hydrocarbon accumulation but have high potentials for solid mineral resources. Therefore, the Bansara area is recommended for organised and formal solid mineral exploration, which can apparently diversified the economy of Nigeria.

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Estimation of sedimentary thickness using spectral analysis of aeromagnetic data over Otukpo and Ejekwe areas of the lower Benue Trough, Nigeria

Cited by 2 publications

References 29 publications

Interpretation of High-Resolution Airborne Radiometric Data Over Part of Lower Benue Trough, Nigeria

Interpretation of High-Resolution Airborne Radiometric Data Over Part of Lower Benue Trough, Nigeria

Determination of sediments thickness in part of Lower Benue Trough, Nigeria, from the residualization of aeromagnetic data: Implication for diversification of the Nigerian economy

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