Structural geometry of Ikogosi warm spring, southwestern Nigeria: evidence from aeromagnetic and remote sensing interpretation

Salawu, N. B. and Fatoba, J. O. and Adebiyi, L. S. and Eluwole, A. B. and Olasunkanmi, N. K. and Orosun, M. M. and Dada, S. S. (2021) Structural geometry of Ikogosi warm spring, southwestern Nigeria: evidence from aeromagnetic and remote sensing interpretation. Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 7 (26).

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In an attempt to understand the general structural patterns of Ikogosi warm spring and environs, remotely sensed images have been integrated with high resolution aeromagnetic anomaly dataset. This is because subsurface faults offer pathways for the upward flow of geothermal fluids and imaging these structures where they are concealed provides localized areas for geothermal investigation. Interpretation of the high resolution aeromagnetic, Landsat-8 and Shuttle Radar Topography Mission data has resulted in the detection of structural features within Ikogosi and environs. The enhancement of aeromagnetic anomaly data using total gradient technique facilitated the identification of three distinct geologic trends. This technique offers good information of structural patterns within the region, including the estimated source depths from the source parameter imaging and 3-D Euler deconvolution methods, which ranges from 100 to 860 m. The results show the distribution and direction of lineaments with major N– S, NE–SW and E–W trends within the study area. The combination of the surface lineaments with magnetic depth maps has established that faults around the warm spring interact, connect and act as conduits for the flow of hydrothermal fluids at varying depths which subsequently channel the fluids to an exit fault/lineament on the surface. The result revealed that the Ikogosi warm spring is situated along a major NNE-trending fault with subsidiary minor E-trending faults. These minor concealed subsidiary faults associated with the Ikogosi warm spring provides a follow-up for geothermal investigation within the region.

Item Type: Article
Subjects: Q Science > QC Physics
Q Science > QE Geology
Depositing User: Mr. Leke Adebiyi
Date Deposited: 12 Jul 2021 07:38
Last Modified: 12 Jul 2021 07:38

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