American Journal of Geophysics, Geochemistry and Geosystems
Articles Information
American Journal of Geophysics, Geochemistry and Geosystems, Vol.5, No.1, Mar. 2019, Pub. Date: Apr. 17, 2019
Source Parameter Imaging and Euler Deconvolution of Aeromagnetic Anomalies over Parts of the Middle Benue Trough, Nigeria
Pages: 1-9 Views: 125 Downloads: 143
Authors
[01] Geoge Emeka Onyishi, Department of Industrial Physics, Enugu State, University of Science and Technology, Enugu, Nigeria.
[02] Gabriel Zeruwa Ugwu, Department of Industrial Physics, Enugu State, University of Science and Technology, Enugu, Nigeria.
Abstract
The aeromagnetic data over Lafia, Akiri, Makurdi and Akwana, parts of the Middle Benue Trough of Nigeria, were interpreted by source parameter imaging (SPI) and Euler deconvolution techniques in order to determine the sediment thickness of the area. The data were analyzed and interpreted using Oasis Montaj and PotentQ software. The regional fields were separated from the total magnetic intensity (TMI) fields to obtain the residual fields using first order polynomial fitting. The residual anomalies were also successively sharpened using first, second and horizontal derivatives. The result of the SPI interpretation revealed two depth models; the deep depth and the shallow depth. The depth to magnetic bodies estimated from the SPI ranged from 318.7 m (shallow magnetic bodies) to 4409.5 m (deep lying magnetic bodies. The depth estimates obtained from the Euler deconvolution technique, using two structural indices of 0 and 0.5, ranged from 902.3 m (out cropping magnetic bodies) to 4909.3 m (deep lying magnetic bodies). The maximum sediment thicknesses obtained from the two interpretation methods are in agreement with each other and indicate the possibility of hydrocarbon accumulation, especially at the northeastern (Akiri) part of the study area).
Keywords
Aeromagnetic Data, Source Parameter Imaging, Euler Deconvolution, Sediment Thickness, Magnetic Anomalies and Hydrocarbon Prospect
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