A GIS-based site investigation for nuclear power plants (NPPs) in Nigeria

Eluyemi, Ayodeji Adekunle; Sharma, Sangeeta; Olotu, Sunday J.; Falebita, D. E.; Adepelumi, A. A.; Tubosun, I.A.; Ibitoye, F.I.; Baruah, Sanjib

doi:10.1016/j.sciaf.2019.e00240

Cited by 9 publications

(7 citation statements)

References 6 publications

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“…It is quite obvious that the intraplate seismicity of Nigeria is not understood yet. A functional seismic network station in Nigeria would give crustal information about the Nigerian terrain as well as revelations of some seismogenic sources, which would ultimately consolidate on some recent seismological studies conducted by some researchers: Eluyemi and Baruah ( 2016 [6][7][8][9][10][11][12] .…”

Section: Introductionmentioning

confidence: 91%

Instrumentation of the Nigeria network of seismological stations

Adekunle Eluyemi

2024

EAR

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“Living in fear of Nigeria biggest Earthquake” is a sub-heading of the Punch daily newspaper of Nigeria, dated, 21st of August, 2016, reported the earthquake/tremor recently witnessed in the ancient town of Saki, accompanied by a series of aftershock events that lasted for about three (3) months (March/May, 2016) southwest Nigeria[1]. Similarly, roughly five (5) years later, another series of earthquakes/tremors occurred again in Saki town, which was reported by an online news vendor named “Ripples Nigeria” dated September 8, 2021, under the sub-heading of “earth tremor rocks Saki in Oyo state”[2]. However, these events were not captured nor recorded by any of the functional seismological stations in Nigeria. The nearest seismological station located at the Obafemi Awolowo University (OAU) Ile-Ife, also failed to capture the events. We therefore seek to examine the instrumentation of the Nigerian National Network of Seismographic Stations. This is necessary to understand the functionalities and the capabilities of the deployed seismometers in each of the seismic stations. Therefore, we evaluated the bandpass limit of the seismic wave frequency for the respective seismic stations in Nigeria through the computation of the amplitude-frequency response curve, phase response curve, and count to cm/sec.

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Section: Introductionmentioning

confidence: 91%

Instrumentation of the Nigeria network of seismological stations

Adekunle Eluyemi

2024

EAR

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“…Of all these fault systems, Ifewara-Zungeru fault is the longest already established linear feature in the Basement Complex of Nigeria. This fault is about 250 km long that bisects the Romanche and Chain fracture lines (extending from the Atlantic Ocean to the northeast [NE] part of Nigeria) in the SW and cuts across the St. Paul's fracture line in the northwest (NW) region of Nigeria [26,34,60] (Figure 2). It took its origin from SW Nigeria and stretched to the NW region of the country, with a north-northeast (NNE)-south-southwest orientation [6] (Figure 3a).…”

Section: Geology and Brief Tectonic Activity Of The Study Areamentioning

confidence: 99%

“…Map of Nigeria revealing some locations where seismic events had occurred (adapted from[6] and[34]). …”

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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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“…For as long as the effective center of the African plate is moving away from the equator, the current tectonic activities of the Gulf of Guinea and West Africa region are expected to be characterized by extensional stress regimes with extension of the West African rift system, In this work, we intend to investigate the regional tectonic stress regime of the Gulf of Guinea and the sub-Sahara West Africa region, from a seismological approach via stress tensor invasion of focal mechanism solutions (FMS). This is of huge importance to be able to predict the stability of the region, in terms of strategic constructions, as it was discussed by the earlier scientists Eluyemi et al (2020a) [7] , Eluyemi et al (2020b) [8] ,…”

Section: Introductionmentioning

confidence: 99%

Tectonic activity in Gulf of Guinea and Sub-Sahara West Africa: A validation of Freeth (1977) using focal mechanism solutions

Adekunle Eluyemi

2024

EAR

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Fault plane solutions for a group of 104; 4.0 ≤ Mw ≤ 7.1 earthquakes between January 1979 and December 2016, extracted from the Global Centroid Moment Tensor Project catalog. Were used to investigate the regional tectonic stress regime of the Gulf of Guinea region. The idea is to validate the theory of membrane tectonics put forward by Freeth (1977)[1] in which the tectonic of the Gulf of Guinea and the sub-Sahara West Africa region were described based on Freeth (1977)[1]. The tectonic of the Gulf of Guinea and the sub-Sahara West Africa region are based on the movement of the African plate, we emphasized the use of rigorous statistical tests to decide on the quality and variability of the earthquake focal mechanisms (FMSs) utilized for the stress tensor inversion analysis. To constrain our analysis, we have applied both the Algorithm of Michael and Gauss technique in our stress tensor inversion analysis of FMS obtained from the region, and the results are found to be coherent and in good agreement with each other. Both Michael (1984)[2] and Zalohar and Vrabec (2007)[3] techniques show that the regional tectonic stress regime of the Gulf of Guinea and the sub-Sahara West Africa is extensional, which is in good agreement with the work of Freeth (1977)[1]. However, our investigation concluded that the orientation of the extensional stress regime is the same as the orientation of the movement of the African plate, which is towards the Euro-Asia plate.

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A GIS-based site investigation for nuclear power plants (NPPs) in Nigeria

Cited by 9 publications

References 6 publications

Instrumentation of the Nigeria network of seismological stations

Instrumentation of the Nigeria network of seismological stations

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

Tectonic activity in Gulf of Guinea and Sub-Sahara West Africa: A validation of Freeth (1977) using focal mechanism solutions

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