Structural Analysis and Interpretation of High Resolution Aeromagnetic data over the Southern Bida basin, North Central, Nigeria
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Date
2020
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Volume Title
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Zuma Journal of Pure and Applied Sciences
Abstract
This study focuses on the analysis and interpretation of high resolution aeromagnetic data
over the southern part of Bida basin. The study covers an area of 24,200 km2
located between
latitude 80
30′N and 90
30′N and longitudes 50
00′E and 70
00′E. Aeromagnetic data in grid
format containing eight sheets in 1/2o by 1/2o
(55 x 55 km) were analyzed and interpreted.
This study employed several magnetic filtering methods to investigate lineaments and other
structural features. The filtering methods used are: reduction to the magnetic equator,
horizontal derivatives, vertical derivatives, analytical signal, and Centre for exploration
targeting grid analysis. The reduced to magnetic equator shows variation in magnetic
signatures ranging from-58.65nT-131.44nT. The results from first vertical derivative, second
vertical derivative, horizontal derivatives and center for exploration targeting maps reveal
that the major structures delineated, trend in NE –SW and NW-SE direction. Since minerals
are structurally controlled, these structures delineated might host the economic mineralsin the
study area. The second vertical derivative shows a major fault line cutting the area into two
parts which is an extension of the Romanche fault. The CET grid analysis map reveals the
geologic boundaries and fault lines within the basement rock.
Description
Keywords
Analytical signal, center for Exploration Targeting, magnetic gradient.
Citation
14. Okwokwo O.I, Adetona A.A, Adewumi T and Umar M.(2020) Structural Analysis and Interpretation of High Resolution Aeromagnetic data over the Southern Bida Basin,North Central,Nigeria. Zuma Journal of pure and applied Science Volume 11, issue 1