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Delineation of Bitumen Saturated Zones in Agbabu, Southwestern Nigeria, Using an Integrated Geophysical Methods
Journal of Energy and Natural Resources
Volume 9, Issue 3, September 2020, Pages: 88-97
Received: Jun. 13, 2020; Accepted: Jun. 24, 2020; Published: Jul. 13, 2020
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Author
Alagbe Olufemi Adigun, Department of Applied Geophysics, Federal University of Technology, Akure, Nigeria
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Abstract
Delineation of bitumen saturated zones in Agbabu, southwestern Nigeria was carried out using an integrated geophysical methods involving the groundmagnetic and electrical resistivity methods. A total of four magnetic traverses were established in the East-west direction, each covering a total length of 130m. The groundmagnetic results revealed geologic structures favourable to accumulation of bitumen and its occurrence at near-surface. It was also revealed that the bituminous zone trend in the East- West direction of the study area. Two techniques was adopted under electrical resistivity method, the horizontal electrica profiling (HEP) and the vertical electrical sounding (VES). The HEP was used to measure the subsurface electrical variations and lateral extent of bitumen over the study area. Four traverses were established in the North-South direction for HEP and were used to generate electrical profiling curves, which showed low resistivity signatures over the study area. The low resistivity signatures were attributed to the intrusion of saline water to the bituminous zones. Two vertical electrical soundings (VES) were carried out, VES1 and VES2 which were carried out on traverse 1 and traverse 3 had five and six geologic layers respectively. The bitumen saturated zones were found to be within layers three and four and underlained by saline water. The average depth to the bitumen saturated zones was found to be between 3.1m and 23.3m downwards. The near-surface occurrence of natural bitumen and the intrusion of saline water might hinder the feasibility of pure and quality water from the shallow hand-dug wells within the study area.
Keywords
Agbabu, Bitumen, Saturated Zone, Horizontal Electrical Profiling, Faults, Groundmagnetic
To cite this article
Alagbe Olufemi Adigun, Delineation of Bitumen Saturated Zones in Agbabu, Southwestern Nigeria, Using an Integrated Geophysical Methods, Journal of Energy and Natural Resources. Vol. 9, No. 3, 2020, pp. 88-97. doi: 10.11648/j.jenr.20200903.11
Copyright
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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