CLASSIFICATION OF THE BASEMENT COMPLEX USING AEROMAGNETIC AND REMOTE SENSING DATA ANALYSES: CASE STUDY OF EKITI STATE, SOUTH-WEST NIGERIA.

Ojo, Olufemi Felix and Osazuwa, Babatunde Isaac and Chiemeke, Collins C. and Osumeje, Oroja Joseph and Oyedele, Akinola Akintunde and Adagunodo, T. A. and Oyeyemi, Kehinde D. and Ejiga, E. G. (2024) CLASSIFICATION OF THE BASEMENT COMPLEX USING AEROMAGNETIC AND REMOTE SENSING DATA ANALYSES: CASE STUDY OF EKITI STATE, SOUTH-WEST NIGERIA. Earth Sciences Malaysia, 8 (2). pp. 152-156. ISSN 2521-5035 (Print) ISSN: 2521-5043 (Online)

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Abstract

This study investigates the basement rocks in Ekiti State for the purpose of geophysical classification so as to delineate prospective area of mineralization within the State. Aeromagnetic data and satellite imagery covering the entire state were analysed using appropriate software. Reduction to equator geophysical transformation was first carried out on the residual magnetic intensity data before the application of Fast Fourier Transform filters to generate some derivative maps such as the analytic signal and tilt derivative maps which amplified lineament and enhanced both weak and strong magnetic anomalies. The Shuttle Radar Topography Mission (SRTM) data were processed to produce lineament density map, which was analysed for various linear and curvilinear features. The study area was classified into magnetic-high anomalous zone (HMA), magnetic-intermediate anomalous zone (IMA) and magnetic-low anomalous zone (LMA) based on the analytical signal analysis. Analysis of the structures showed the dominance of northeast-southwest and northwest-southeast trends. Evaluation of Lineament density showed high value of 0.5203 km-2 around the centre and the western part of the study area, which are also HMA and IMA zones, an indication of concentration of more faults, joints and line of weaknesses which may serve as favourable tracts for mineralisation in the study area.

Item Type:	Article
Uncontrolled Keywords:	Aero-magnetic data, total magnetic intensity, Magnetic anomalous zone, lineament density.
Subjects:	T Technology > T Technology (General) T Technology > TP Chemical technology
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Patricia Nwokealisi
Date Deposited:	11 Feb 2025 16:31
Last Modified:	11 Feb 2025 16:31
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/18784

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