Integration of aeromagnetic and electrical resistivity imaging for groundwater potential assessments of coastal plain sands area of Ado-Odo/Ota in southwest Nigeria

Joel, Emmanuel; Olasehinde, Peter I.; Adagunodo, T. A.; Maxwell, Omeje; Akinyemi, M. L.; Ojo, John Sunday

doi:10.1016/j.gsd.2019.100264

Cited by 22 publications

(10 citation statements)

References 21 publications

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“…The results of this study are in agreement with the works of [93] and [94] who reported that the maximum depth to the aquiferous units within Atan-Ota axis, a brittle deformation zone, varied from 80 to 130 m.…”

Section: Basement Mapping and Structural Frameworksupporting

confidence: 93%

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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Section: Basement Mapping and Structural Frameworksupporting

confidence: 93%

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

Oladejo¹,

Adagunodo

Sunmonu

et al. 2020

Open Geosciences

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“…Various methods have been employed in groundwater exploration globally, ranging from traditional methods such as fracture trace method and borehole drilling (Lattman and Parizek, 1964;Acharya et al, 2012) to the use of geophysical methods such as electrical resistivity, magnetics, electromagnetics, seismic, radiometric techniques and so on (McNeill, 1991;Bernard and Legchenko, 2003;Goldman and Neubauer, 1994;Hewaidy et al, 2015;Shishaye and Abdi, 2016;Helaly, 2017;Muhammad and Khalid, 2017;Muthamilselvan et al, 2017;Poongothai and Sridhar, 2017;Umar et al, 2017;Gao et al, 2018). In addition, Sunmonu et al (2016), Adagunodo et al (2018) and Joel et al (2019a) had established that geophysical methods are capable to map the depth togroundwater table. Groundwater has been successfully investigated on sedimentary and basement terrains using resistivity technique by number of researchers (Okereke et al, 1998;Nwankwoet al, 2004;Singh et al, 2006;Ariyo and Adeyemi, 2009;Al-Amoush, 2010;Nwankwo, 2011;Zarroca et al, 2011;Ikhane et al, 2012;Molli et al, 2015;Omeje et al, 2013;Omeje et al, 2014;Rotimi et al, 2014;Sunmonu et al, 2015;Aizebeokhai et al, 2016;Sunmonu et al, 2016;Joel et al, 2016;Muhammad and Khalid, 2017;Poongothai and Sridhar, 2017;Umar et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Geo-investigation on groundwater control in some parts of Ogun state using data from Shuttle Radar Topography Mission and vertical electrical soundings

Olasehinde

Adagunodo

Maxwell

et al. 2020

Heliyon

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Groundwater is a vital natural resource that plays a significant function in sustainability of living things on earth. Its exploration requires special skill for optimum exploitation. Shuttle Radar Topography Mission (SRTM)and Vertical Electrical Sounding (VES) were used to detectthe stratigraphy and subsurface structures controlling the groundwater system around Iju -Ota, Ogun State, Southwestern Nigeria. Nineteen (19) VES points were carried out where there were dense concentrations of lineaments and interconnected to establish the connection of the observed lineaments with groundwater occurrence in the study area using Schlumberger array, with electrode spacing of AB/2 varying from 180 to 320 m. The analysis of SRTM data revealedthe dominating structural NE-SW and NW-SE trends, which control aquifer structure. The geoelectrical parameters from the VES results were used to map the stratigraphic sequences in the study area. Six (6) units that comprisethe topsoil, lateritic clay, clayey sand, mudstone, sand (main aquifer), and shale or clay were identified in the study area. The aquiferous unit around Iju -Ota axis ranged from 30 to 80 m. Theextracted from the hill shaded SRTM data and the result of VES revealed that the thickness of the aquifer is as a result of interconnectivity of the lineaments observed in the SRTM data suggesting that the groundwater occurrence in the study area is chiefly controlled by these fractures.

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“…The inclines are reportedly about 1° or less southwestwards (Table 1). The Basement Complex rocks superimpose more than 50% of the Coastal basins [47][48][49]. The Abeokuta Formation is the oldest outcropping sedimentary formation in the Ogun and Osse River Basin.…”

Section: The Ise-afowo Araromi Akinbo and Ilaro Formationsmentioning

confidence: 99%

Detailed Hydrogeological and Hydrochemical Reassessment of Coastal Basins of Southwestern Nigeria

2021

Geol Earth Mar Sci

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prolonged residence time in the aquifer and saltwater intrusion account for the variability of hydrochemistry of groundwater in coastal aquifers [1,[11][12][13][14]. The hydrochemistry of coastal aquifers of southwestern Nigeria is highly variable due to variation in geological configurations and human activities. Groundwater contamination stemming from human activities, and inadequate sewage discharge is on the rise in Nigeria [15][16][17]. Consequently, groundwater utilized for domestic uses is problematic and hence calls for scientific scrutiny. Examining hydrochemistry and groundwater quality in coastal regions is crucial to monitor and detect groundwater contaminants sources [18][19][20][21]. Groundwater quality analysis in Abeokuta South, Nigeria by Emenike, Nnaji [17] showed that water quality parameters exhibited wide variations from location to location. Sodium, magnesium, iron (++), and EC showed the most violation of drinking water quality standards. Anthropogenetic actions are escalating threat to groundwater quality and thus call for routine monitoring of groundwater in Abeokuta. Statistical and hydrochemical modelling of groundwater quality southwestern Nigeria showed a conjunctive imprint of anthropogenic and geogenic activities influencing the increasing dissolved chemical constituents in the groundwaters

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Integration of aeromagnetic and electrical resistivity imaging for groundwater potential assessments of coastal plain sands area of Ado-Odo/Ota in southwest Nigeria

Cited by 22 publications

References 21 publications

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

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

Geo-investigation on groundwater control in some parts of Ogun state using data from Shuttle Radar Topography Mission and vertical electrical soundings

Detailed Hydrogeological and Hydrochemical Reassessment of Coastal Basins of Southwestern Nigeria

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