Structural Interpretations Inferred from a High Resolution Aeromagnetic (HRAM) Data over Parts of Onshore Niger Delta, Nigeria
International Journal of High Energy Physics
Volume 4, Issue 3, June 2017, Pages: 23-31
Received: Jun. 3, 2017; Accepted: Jun. 29, 2017; Published: Aug. 15, 2017
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Authors
Bello Rasaq, Department of Physics, University of Port Harcourt, Choba, Nigeria
Ofoha Chimezie Charles, Department of Physics, University of Port Harcourt, Choba, Nigeria
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Abstract
Aeromagnetic data acquired by the Nigerian Geological Survey Agency (NGSA) and which covers about 3025 square kilometer of some parts of onshore Niger Delta, Nigeria, was processed and interpreted with the purpose of highlighting the structural lineaments with their corresponding trend patterns and then inferring the effect of the structures as it relates to the hydrocarbon potential and tectonic history of the area using the qualitative approach. Using polynomial fitting of degree two (2), regional - residual separation was carried out on the Composite Total Magnetic Intensity (CTMI) map, lying geographically within longitude 6°30'E-7°0'0''E and latitude 4°30'N-5°0'0'', and this generated the regional and residual maps. Some enhancement techniques applied upon the residual map gave rise to some directional gradient maps that depicted structural lineaments trending in the E - W, NE - SW, NW - SE and N - S directions. These lineaments influence the tectonics of the area and as such created faults and fractures that fostered the migration and entrapment of hydrocarbon, and perhaps mineral, within the area under review.
Keywords
Lineaments, Polynomial Fitting, Migration, Concealment, Olobiri, Degema
To cite this article
Bello Rasaq, Ofoha Chimezie Charles, Structural Interpretations Inferred from a High Resolution Aeromagnetic (HRAM) Data over Parts of Onshore Niger Delta, Nigeria, International Journal of High Energy Physics. Vol. 4, No. 3, 2017, pp. 23-31. doi: 10.11648/j.ijhep.20170403.11
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Copyright © 2017 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.
References
[1]
Mariita, N. O. (2007): The magnetic method. Presented at Short Course II on Surface Exploration for Geothermal Resources, organized by UNU - GTP and Ken Gen, at Lake Naivasha, Kenya, 1 - 8.
[2]
Henry, L. (2010): Magnetic and Gravity Methods in Mineral Exploration: the Value of Well - Rounded Geophysical Skills. CSEG recorder, 27(2), 31 - 35.
[3]
Jose, R. (2009): Gravity and magnetic methods: Presented at “Short Course on Surface Exploration for Geothermal Resources”, organized by UNU - GTP and La Geo, in Ahuachapan and Santa Tecla, El Salvador, 1 - 13.
[4]
Micahel, D. and Steven, M. (2014): Geophysics for the Mineral Exploration Geoscientist (1st edn). Cambridge University Press, New York. 86 - 88.
[5]
Abdusalam, N. N., Mallam A., and Likkason, O. K. (2011): Evidence of some tectonic events in the Koton Kaifi area, Nigeria, from aeromagnetic studies. Journal of petroleum and gas exploration research, 3 (1), 7 - 15.
[6]
Emujakporue, G and. Ofoha, C. (2015). Qualitative interpretation of aeromagnetic data of parts of offshore Niger Delta, Nigeria. Scientia Africana, 14(1), 40 - 54.
[7]
Fairhead, J. D. (2012): Regional tectonics and basin formation: The role of potential field studies in Phanerozoic. Regional Geology of the world, 12 (2), 330 - 341.
[8]
Aizebeokhai, A. P. and Olayinka, I. (2011): Structural and stratigraphic mapping of Emi field, offshore Niger Delta. J. Geol. Min. Res., 3(2), 25 - 38.
[9]
Oladele, S. and Ojo, B. (2013): Basement Architecture in Part of the Niger Delta from Aeromagnetic Data and its Implication for Hydrocarbon Prospectivity. The Pacific Journal of Science and Technology, 14(2), 512 - 520.
[10]
Okiwelu, A. A., Obianwu, V. I., Eze, O., and Ude, I. A. (2012): Magnetic anomaly patterns, fault block tectonism and hydrocarbon related structural features in the Niger Delta basin. Journal of applied geology and geophysics, Vol 2, Issue 1 Ver. 1, 31 - 46.
[11]
Doust, H., and Omatsola, E. (1990): Divergent passive Margin Basin, AAPG Memoir 48. American association of Geologists, 48:42-55.
[12]
Li, Y. and Oldenburg, W. (1998): Separation of regional and residual magnetic field data. Geophysics, 63 (2), 431 - 439.
[13]
Phillips, J. D. (2002). Two - step processing for 3D magnetic source locations and structural indices using extended Euler or analytic signal methods: 72nd Ann. Internat. Mtg. Soc. Expl. Geophys, Expanded Abstracts, GM 1. 5. 2 - 7.
[14]
Luis, A. M. (2009): Processing techniques of aeromagnetic data: Case studies from the Precambrian of Mozambique. M. sc thesis, Uppsala university, Mozambique, (Publ).
[15]
Blakely, R. J. (1996): Potential theory in gravity and Magnetic Applications. Cambridge University Press, New York, 435 - 567.
[16]
Gunn, P. J., Maidment, D. and Milligan, P. R. (1997): Interpreting aeromagnetic data in areas of limited outcrop. Journal of Austrian Geology and Geophysics, 17(2), 175 - 185.
[17]
Onuba, L. N., Anudu, G. K., Chiaghanam, O. I. and Anakwuba, E. K. (2011). Evaluation of Aeromagnetic Anomalies Over Okigwe Area, South - eastern Nigeria. Research Journal of Environmental and Earth Sciences 3(5): 498 - 507.
[18]
Stone, V., Fairhead, J. D., Oterdoom, W. H. and Carigali, P. (2004): The meter reader: Micro magnetic seep detection in the Sudan. The Leading Edge, 23(8): 734-737.
[19]
Jiakang, L. and Igor, M. (2005): Potential Field investigation of Williston Basin Basement. Canadian Society of Exploration Geophysicists National Convention, pp. 75-76.
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