Interpretation of high resolution aeromagnetic data for lineaments study and occurrence of Banded Iron Formation in Ogbomoso area, Southwestern Nigeria

Oladunjoye, Michael A.; Olayinka, A. I.; Alaba, Mustapha; Adabanija, M. A.

doi:10.1016/j.jafrearsci.2015.10.015

Cited by 24 publications

(16 citation statements)

References 23 publications

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“…The presence of the inferred lineament trends in the study area, as revealed by the present study, suggests imprints of the Liberian and African orogenies in the study area. Following Oladunjoye et al (2016), the thermal effects of the emplacement of the basement rocks whose epeirogenesis is associated with the Pan African events may be possible cause of the curvilinear lineament observed in northern part of the study area. Finally, the lineament trends inferred in this study are consistent with the trends inferred from previous studies in the northern Nigerian basement complex (Olasehinde et al, 1990;Raimi et al, 2014;Salau et al, 2016).…”

Section: First Vertical Derivative Results (Fvd)mentioning

confidence: 95%

Analysis and interpretation of high resolution aeromagnetic data over Kabo town and its adjoining areas, in Northwestern Nigeria

Suleiman¹,

Aku²,

Sanusi³

2019

Bayero J. Pure App. Sci.

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INTRODUCTION Geophysics is a subject of natural science is concerned with the physical processes and physical properties of the Earth and its surrounding space environment using the physics principles to the study of the earth's interior. It is therefore a threeof the principles of Physics to the Earth, Moon and Planets (Reynolds, Geophysics is applied to societal needs, such as mineral resources, mitigation of natural hazards and environmental protection. Geophysical survey data are used to analyze potential petroleum reservo deposits, locate groundwater and it also plays an essential role in the development of the theory of plate tectonics. The Earth acts like a large spherical magnet: it is surrounded by a magnetic field that changes with time and location. The field is generated by a dipole magnet (i.e., a straight magnet with a North and South Pole) located at the center of the Earth. The magnetic fields of geological bodies are superimposed on the background of the Earth's main field. Variations in magnitude and direction of this field influence both the magnitudes and shapes of local anomalies. The purpose of magnetic surveying is to identify and describe regions of the earth's crust that have unusual (anomalous)

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Section: First Vertical Derivative Results (Fvd)mentioning

confidence: 95%

Analysis and interpretation of high resolution aeromagnetic data over Kabo town and its adjoining areas, in Northwestern Nigeria

Suleiman¹,

Aku²,

Sanusi³

2019

Bayero J. Pure App. Sci.

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“…Dewey, 1972;Dada, 2006). The prominent trends are in concordance with the conspicuous magnetic anomalies and as such are classified as brittle deformation zones while the scanty linear/curvilinear E -W trends (in a purple circle) which crosscut the anomalies trends are ductile (Paananen, 2013;Oladunjoye et al, 2016). The late deformation could be responsible for the metamorphism, migmatisation, and gneissification near Bakin-Ruwa and Buya regions.…”

Section: Structural Mappingmentioning

confidence: 69%

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

Bamigboye

Olatunji

et al. 2020

Heliyon

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This study presents an appraisal of mineralization potential and the geologic record of Kaoje and environs using high-resolution aeromagnetic data. The data were analyzed using the fast Fourier transform technique for reduction-to-equator (RTE), analytic signal (AS), total horizontal derivative (THDR), tilt derivative (TDR), spectral analysis and Euler deconvolution at varying spectral indices. The reduced to equator residual magnetic intensity range from-73.4 to 205.6 nT and are associated with contrasting lithology of the Sedimentary and Basement Complex rocks. The anomalies and analytic signal amplitude unfold and update the extension of Zuru Schist to the southern region of Kaoje, elongated banded gneiss within the schist body, pegmatite intrusion through the migmatite and NNW-SSE trending schist hosted manganite and sandstone-hosted goethite. Estimated depth to shallow and deeper magnetic sources ranged from 0 to 59 m and 225-415 m respectively, and the corresponding Euler solutions revealed perfect clustering along notable geologic features and minerals. The iron mineralization are revealed as sourced from the magmatic bodies that lie beneath the sedimentary rocks and a corresponding sphere geologic model within northwest and southwest of Kaoje at a depth range of 0-225 m. The structural trends suggested the tectonic events in the area and indicate an imprint of Zungeru-Anka transcurrent fault that serves as a conduit for iron mineralizing fluid to Kaoje.

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“…The survey was conducted in drape mode using the realtime differential GPS at a sensor mean terrain clearance of 75 m. The spacings of both the traverse and the tie lines are 500 and 2,000 m, with the orientation of the flight and tie lines in NW-southeast (SE) and NE-SW, respectively [66]. The data sets were de-cultured, leveled, corrected for International Geomagnetic Reference Field, gridded at an appropriate cell size that amplifies the information contained in the anomaly, and suppresses the latitudinal effect and unwanted signal (noise) [67,68]. The field data (i.e., total magnetic intensity [TMI]) were generated in x, y, and z format (where x, y, and z represent longitude, latitude, and TMI, respectively) on Microsoft Office Excel, so as to export it to Oasis Montaj™ 6.4.2 package [95].…”

Section: Methodsmentioning

confidence: 99%

“…The RTE was performed using two-dimensional fast Fourier transform (2D-FFT) method, with the mean inclination and declination values of −11.10 and −4.90, respectively. Oladunjoye et al [68] stated that applying 2D-FFT on potential field data simplifies the complex information that is embedded in the original data. It also improves the quality of data being processed for effective geological deductions.…”

Section: Methodsmentioning

confidence: 99%

Aeromagnetic mapping of fault architecture along Lagos–Ore axis, southwestern Nigeria

Oladejo¹,

Adagunodo

Sunmonu

et al. 2020

Open Geosciences

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A seismic wave is released when there is sudden displacement on a fault plane. The passage of this wave along the fault plane or within the lithosphere could result in ground shaking or vibration at the surface of the Earth. To provide a geophysical explanation to this phenomenon, the high-resolution aeromagnetic data of the sedimentary terrain and part of the Basement Complex of Southwestern Nigeria were processed and interpreted to provide fault architecture of the area, which could serve as conduit for the passage of seismic energy in the study area. High-resolution aeromagnetic data along the Lagos–Ore axis are processed for fault mapping in the study area. The reduced-to-equator (RTE) residual aeromagnetic data used were enhanced using the total horizontal derivative (THD) and upward continuation (UC) filtering techniques on Oasis Montaj 6.4.2 (HJ) software. The resultant maps were overlaid and compared with the plotted RTE residual maps for relevant interpretations. Varying signatures of magnetic anomalies are grouped into high (57.9–89.1 nT), intermediate (38.2–57.9 nT), and low (4.0–38.2 nT) magnetic intensities, which are associated with contracting basement rocks features. The obtained lineaments from the THD reveal areas of various deformations such as brittle, which is associated with faults/fractures, and ductile deformation, which is associated with folds of geological features. The faults, as depict by the UC map, reveal different depth ranges of 500–2250 m at the western side and 1,500–1,250 m at the northwestern area of the study. Since it has been on record that September 11, 2009, earth tremor of magnitude 4.4, with the epicenter at Allada, Bennin Republic, 128 km west of Lagos, Nigeria occurred within the study area, it can be inferred that the established geologic fault architecture could be responsible for the hazard and be part or synthetic to the Ifewara-Zungeru fault in Nigeria.

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Interpretation of high resolution aeromagnetic data for lineaments study and occurrence of Banded Iron Formation in Ogbomoso area, Southwestern Nigeria

Cited by 24 publications

References 23 publications

Analysis and interpretation of high resolution aeromagnetic data over Kabo town and its adjoining areas, in Northwestern Nigeria

Analysis and interpretation of high resolution aeromagnetic data over Kabo town and its adjoining areas, in Northwestern Nigeria

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

Aeromagnetic mapping of fault architecture along Lagos–Ore axis, southwestern Nigeria

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