Interpretation of high resolution aeromagnetic data for mineral prospect in Igbeti-Moro area, Southwestern Nigeria

2nd International Conference on Science and Sustainable Development "The Role of Science in Novel Research and Advances in Technology"

自然科学;经济学

Olasunkanmi, N.K.^1 ; Sunmonu, L.A.^2,3 ; Adabanija, M.A.^2,3 ; Oladejo, P.O.^4

Physics and Materials Science Department, Kwara State University, Malete, Nigeria^1

Pure and Applied Department, Ladoke Akintola University of Technology, Ogbomoso, Nigeria^2

Earth Science Department, Ladoke Akintola University of Technology, Ogbomoso, Nigeria^3

Physics Department, Emmanuel Alayande College of Education, Oyo, Nigeria^4

关键词: 2D fast fourier transforms;    Fractures and faults;    Geologic features;    High resolution aeromagnetic data;    Horizontal gradients;    lineament;    Magnetic anomalies;    Mineralization;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/173/1/012033/pdf
DOI  :  10.1088/1755-1315/173/1/012033

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

High resolution aeromagnetic data that covers Igbeti-Moro area, within southwestern Nigeria, has been subjected to data enhancement processes and interpreted to establish significant geologic features associated with occurrence of marble, gabbro and muscovite mineralization in the area. These were established by applying 2D Fast Fourier transform filters for reduction to equator (RTE), lineament enhancement of vertical and total horizontal gradient, edge detection of analytic signal amplitude (ASA), and magnetic source depth parameter imaging (SPI) and average power spectrum (APS); using Oasis Montaj software. The RTE residual magnetic intensity of the area ranged between - 338.3 nT to - 2.4 nT, 9.9 to 27.7 nT and 32.1 to 208.0 nT for low, intermediate and high magnetic susceptibility respectively which indicate contrasting basement rocks (namely; granite-gneiss) and intrusion of quartz and amphibolite schists. The lineament development and its disjoint revealed fractures and faults associated with emplacement of the quartz-schist and muscovite-schist, which would have formed synchronously with isoclinal fold and hosts marble, gabbro, amphibolites and muscovite mineralogy at shallow depth that ranges from 0 to 200 m in the northeastern, western, north central sections of the area. The geologic features observed in the study area have been established to be associated with the solid minerals that can be of social-economic benefit.