Interpretation of high resolution aeromagnetic data of Kaoje and its environ, western part of the Zuru Schist belt, Nigeria: implication for Fe–Mn occurrence

Olasunkanmi, Nurudeen Kolawole; Bamigboye, Olufemi Sijuade; Olatunji, Saminu; Salawu, Naheem Banji; Bamidele, Toba

doi:10.1016/j.heliyon.2020.e03320

Cited by 18 publications

(9 citation statements)

References 27 publications

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“…Multiple successive regimes of deformation have resulted in isoclinal folding and cleavage development in the area. Other structural patterns such as a NW-SE sinistral conjugate systems as a result of Late Pan-African brittle deformation are present (Aisabokhae 2019, Olasunkanmi et al 2020.…”

Section: Geological Settingmentioning

confidence: 99%

Spatial distribution of radiogenic heat in the Iullemmeden basin – Precambrian basement transition zone, NW Nigeria

Aisabokhae

Adeoye²

2021

geol

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The area which transcends the Precambrian basement complex onto the Sokoto sector of the Iullemme-den basin in northwestern Nigeria presents a unique prospect for geothermal exploration research in the absence of regional heat production data, despite its tectonic history and depositional characteristics. In this study, geophysical exploration employing radiometric technique was adopted to classify the petrologic units within the fringes of the Iullemmeden basin and the adjoining crystalline basement complex so as to estimate the radiogenic heat potential within the terrain that may support geothermal considerations. Airborne radiometric measurements acquired over the area were digitized and processed to obtain radioelement concentration maps and the K/Th/U ternary map. Results show that the ranges of measured concentrations of 40K, 238U and 232Th are 4.6 to 18.9%, 0.7 to 4.9 ppm and 4.6 to 18.9 ppm respectively. Radiogenic heat estimation derived from radioelement data within eight petrologic units comprising quaternary sediments, schist, carbonates, shale/clay, younger granites, older granites, gneissic rock and migmatite showed that the lowest radiogenic heat production estimates ranging from 0.27–0.66 μW∙m−3 were recorded in the sedimentary terrain within the quaternary sediments while the highest radiogenic heat production values of between 2.04 to 2.34 μW∙m−3 were recorded in the basement com-plex within gneissic rocks. The spatial distribution of radiogenic heat in the area showed an increased heat gradient within the basement complex and a diminishing heat gradient over the Iullemmeded basin.

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Section: Geological Settingmentioning

confidence: 99%

Spatial distribution of radiogenic heat in the Iullemmeden basin – Precambrian basement transition zone, NW Nigeria

Aisabokhae

Adeoye²

2021

geol

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“…The inclination of each segment offers insights into the vertical distance to the uppermost layer of a collection of magnetic entities. [13] The slope (M) of the linear regression line that best fits the semi-logarithmic plot of power versus wave number is equal to negative two times the wave number (Ƶ). If the frequency unit is written as cycles per kilometer, the appropriate relationship can be represented as -4π Ƶ, where Ƶ is the average depth of ensembles.…”

Section: Radially Averaged Power Spectrummentioning

confidence: 99%

Derivation of geomagnetic field to determine geothermal flow at Terak, Bangka Belitung

Kusmita,

Kumala,

Agustin

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The Geothermal system on Bangka Belitung islands are characterised to a radiogenic type of non-volcanic geothermal energy. The presence of geothermal energy in this region can be attributed to the geological characteristics of granite rocks, which undergo processes such as fracturing, folding, or faulting. The primary objective of this study is to figure out the subsurface heat flow patterns within the geothermal region of Terak. The process of collecting data was conducted via a Proton Precession Magnetometer (PPM) instrument, which consisted of a track of 2.5 kilometres in length. The determination of subsurface heat flow patterns in total magnetic anomaly, regional anomaly, and residual anomaly was achieved through the application of the First Horizontal Derivative (FHD) and Second Vertical Derivative (SVD) algorithms. The findings indicate the presence of a subsurface heat flow pattern in the eastern region, which spreads towards the southeast and further extends to the southwest. Notably, this pattern is characterised by abnormal depths ranging from about 20 to 130 metres beneath the surface. The observed phenomenon was in line with the consistent occurrence of geothermal manifestations in the region.

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“…IGRF ensures uniformity in data reduction methods. Mineral evaluation programs, basin framework, hydrocarbon, hydrogeological explorations, and regional geologic boundary delineation can benefit from processed and corrected high-resolution aero-magnetic data [35][36][37]. The airborne magnetic data used in this study were corrected and processed into a total magnetic intensity map (Figure 4), which was gridded, stored, and shown in color raster format in Oasis Montaj Geosoft.…”

Section: Data Acquisitionmentioning

confidence: 99%

Field Observations and Geophysical Research Applied to the Detection of Manganese (Mn) Deposits in the Eastern Part of Oban Massif, South-Eastern Nigeria: An Integrated Approach

et al. 2022

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The growing need for an industrialized world, especially in Africa, cannot be feasible without adequate mineral resources. Thus, the search for more mineral deposits will continue to be necessary. An integrated approach involving geological mapping and a high-resolution geophysical (aeromagnetic) investigation was conducted to assess the manganese mineralization in parts of the Oban Massif, southeast Nigeria. The aeromagnetic data were processed using regional-residual anomaly separation techniques, first vertical derivative (1VD), analytical signals, source parameters imaging (SPI), and Euler deconvolution to better understand magnetic source distributions and their depths of occurrence. The geological investigation revealed a dominant variety of metamorphic rock types, including migmatitic (banded) gneisses hornblende granite gneisses, amphibolites, charnockites, and some quartzite ridges. Also present are some indications of pockets of dolerites. The study area also observed epithermal Mn+Fe+Qtz vein type mineralization associated with hydrothermal alteration zones whose orientation coincides with dominant structural orientation from aeromagnetic interpretation. Analysis of aeromagnetic data shows that the study area is dominated by ENE, NNE, and E-W structural directions (near-surface basement structures), with the ENE trends related to mineralization in the area. The manganese mineralization within Oban Massif is structurally controlled. The depths of the magnetic anomalies in the study area were estimated using SPI and Euler decomposition algorithms. SPI delineated the shallow, intermediate, and deep magnetic anomalies at 84–142 m, 152–200 m, and 215–656 m, respectively. Euler decomposition, however, revealed that shallow, intermediate, and deep depths occurrence of the magnetic anomalies are at 200–377 m, 393–472 m, and 499–793 m, respectively.

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Interpretation of high resolution aeromagnetic data of Kaoje and its environ, western part of the Zuru Schist belt, Nigeria: implication for Fe–Mn occurrence

Cited by 18 publications

References 27 publications

Spatial distribution of radiogenic heat in the Iullemmeden basin – Precambrian basement transition zone, NW Nigeria

Spatial distribution of radiogenic heat in the Iullemmeden basin – Precambrian basement transition zone, NW Nigeria

Derivation of geomagnetic field to determine geothermal flow at Terak, Bangka Belitung

Field Observations and Geophysical Research Applied to the Detection of Manganese (Mn) Deposits in the Eastern Part of Oban Massif, South-Eastern Nigeria: An Integrated Approach

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