Mapping magnetic lineaments and subsurface basement beneath parts of Lower Benue Trough (LBT), Nigeria: Insights from integrating gravity, magnetic and geologic data

Abdullahi, Mukaila; Singh, Upendra; Roshan, Ravi

doi:10.1007/s12040-018-1038-9

Cited by 18 publications

(5 citation statements)

References 64 publications

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“…The high to very high geothermal potential class (Orange-Pinkish colored anomalies) also agrees (conformed) with the field distribution of the following geothermal indicators viz; Wikki warm spring (32 °C), Ruwan-Zafi Hot spring (54 °C), mud volcanoes around Billiri and Kaltungo areas, and the distribution of the volcanic rocks near Billiri-Kaltungo The current geothermal prospectivity map shows the regions of greater possibility for geothermal energy occurrences, indicating that the Wuyo-Gubrunde areas and the Billiri-Kaltungo areas, displayed a very high potential for geothermal occurrences, as represented by an extensive NE-SW oriented anomaly which coincides with a lot of regional structural lineaments patterns [69]. The anomaly spans numerous towns such as the Billiri-Kaltungo area, Tula, Deba, Wuyo, and the eastern part of Bajoga shows multiple field exposures of granites, basalts, and mud volcanoes.…”

Section: Discussionmentioning

confidence: 91%

A Preliminary Geothermal Prospectivity Mapping Based on Integrated GIS, Remote-Sensing, and Geophysical Techniques around Northeastern Nigeria

2021

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Spatial mapping of potential geothermal areas is an effective tool for a preliminary investigation and the development of a clean and renewable energy source around the globe. Specific locations within the Earth’s crust display some manifestations of sub-surface geothermal occurrences, such as hot springs, a volcanic plug, mud volcanoes, and hydrothermal alterations, that need to be investigated further. The present area of investigations also reveals some of these manifestations. However, no attempt was made to examine the prospectivity of this terrain using the efficient GIS-based multicriteria evaluation (MCE) within the scope of the Analytic hierarchy process (AHP). The integration of remote sensing, Geographic information system (GIS), and other geophysical methods (Magnetic and gravity) was performed to map the promising geothermal areas. Multiple input data sets such as aero-magnetic, aero-gravity, aero-radiometric, digital elevation model (DEM), geological map, and Landsat-8 Operational Land Imager (OLI) data were selected, processed, and use to generate five thematic layers, which include heat flow, temperature gradients, integrated lineaments, residual gravity, and lithology maps. The five thematic layers were standardized and synthesized into a geothermal prospectivity map. The respective ranks and weight of the thematic layers and their classes were assigned based on expert opinion and knowledge of the local geology. This research aims to apply an efficient method to evaluate the factors influencing the geothermal energy prospects, identify and map prospective geothermal regions, and, finally, create a geothermal prospectivity model.

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Section: Discussionmentioning

confidence: 91%

A Preliminary Geothermal Prospectivity Mapping Based on Integrated GIS, Remote-Sensing, and Geophysical Techniques around Northeastern Nigeria

2021

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“…However, depth estimation of anomalous sources in frequency/wavenumber domain is simple and more reliable due to the fact that, in wavenumber domain, the convolution operator is conveniently transformed to multiplication notation using Fourier Transform. The estimation of depth from the approach is normally done from the slope of the logarithmic plot of the power spectrum against the wavenumber [12]. Geological and tectonic complexity of a region can be interpreted from the technique of spectral analysis.…”

Section: Discussionmentioning

confidence: 99%

“…Gravity surveys play vital role in recognition of geological structures such as sedimentary basins, faults, caves and other archeological structures [1][2][3][4][5]. There are varieties of techniques and methods for the interpretation of gravity anomalies over or due to sedimentary basins [6][7][8][9][10][11][12]. The structure of the sedimentary basins is often derived from the gravity anomalies with constant density contrast throughout the section of the basins [13].…”

Section: Introductionmentioning

confidence: 99%

Gravity Anomaly and Basement Estimation Using Spectral Analysis

Abdullahi¹

2022

Gravitational Field - Concepts and Applications

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Gravity survey and interpretations play a very vital role more especially in petroleum prospecting. Spectral analysis of gravity anomaly has been successful in the estimation of sedimentary basement. Spectral analysis technique can be used in designing filter for the residual and region separation of complete Bouguer anomaly. The residual gravity anomaly which is of prime importance for applied geophysicists interested in the subsurface features is considered most useful for the interpretation of sedimentary basin. In this chapter, interpretation of the complete Bouguer gravity anomaly, the importance of the separation of the Bouguer gravity anomaly into its residual and regional component is presented. The residual component is considered for the application of the spectral analysis approach.

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“…The advantages of these methods are relatively low cost, high productivity of work, and the possibility to obtain information about large territories in great depth. Many examples of successful applications of potential methods in different areas of the world and for solving both prospecting and theoretical geologic problems are described [30][31][32]. In the first stages, the inversion of geophysical data is carried out in two dimensions and for each method separately [33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Robust 3D Joint Inversion of Gravity and Magnetic Data: A High-Performance Computing Approach

Del Razo Gonzalez,

Yutsis

2023

Applied Sciences

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One of the fundamental challenges in geophysics is the calculation of distribution models for physical properties in the subsurface that accurately reproduce the measurements obtained in the survey and are geologically plausible in the context of the study area. This is known as inverse modeling. Performing a 3D joint inversion of multimodal geophysical data is a computationally intensive task. Additionally, since it involves a modeling process, finding a solution that matches the desired characteristics requires iterative calculations, which can take days or even weeks to obtain final results. In this paper, we propose a robust numerical solution for 3D joint inversion of gravimetric and magnetic data with Gramian-based structural similarity and structural direction constraints using parallelization as a high-performance computing technique, which allows us to significantly reduce the total processing time based on the available Random-Access Memory (RAM) and Video Random-Access Memory (VRAM)and improve the efficiency of interpretation. The solution is implemented in the high-level programming languages Fortran and Compute Unified Device Architecture (CUDA) Fortran, capable of optimal resource management while being straightforward to implement. Through the analysis of performance and computational costs of serial, parallel, and hybrid implementations, we conclude that as the inversion domain expands, the processing speed could increase from 4× up to 100× times faster, rendering it particularly advantageous for applications in larger domains. We tested our algorithm with two synthetic data sets and field data, showing better results than standard separate inversion. The proposed method will be useful for joint geological and geophysical interpretation of gravimetric and magnetic data used in exploration geophysics for example minerals, ore, and petroleum search and prospecting. Its application will significantly increase the reliability of physical-geological models and accelerate the process of data processing.

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Mapping magnetic lineaments and subsurface basement beneath parts of Lower Benue Trough (LBT), Nigeria: Insights from integrating gravity, magnetic and geologic data

Abstract: In this study, we present the analysis of the aeromagnetic data of parts of the Lower Benue Trough. Lineament analysis of the aeromagnetic data demonstrated four tectonic trends of the basement terrain.

Cited by 18 publications

References 64 publications

A Preliminary Geothermal Prospectivity Mapping Based on Integrated GIS, Remote-Sensing, and Geophysical Techniques around Northeastern Nigeria

A Preliminary Geothermal Prospectivity Mapping Based on Integrated GIS, Remote-Sensing, and Geophysical Techniques around Northeastern Nigeria

Gravity Anomaly and Basement Estimation Using Spectral Analysis

Robust 3D Joint Inversion of Gravity and Magnetic Data: A High-Performance Computing Approach

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