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IJSTR >> Volume 7 - Issue 2, February 2018 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Integrated Approach Involving Aeromagnetic And Landsat For Delineating Structures And Its Implication On Mineralisation

[Full Text]

 

AUTHOR(S)

Olomo, K. O., Olayanju, G. M., Adiat K. A. N., Akinlalu, A. A.

 

KEYWORDS

aeromagnetic, depth-to-magnetic source, Euler deconvolution, Landsat imagery, lineaments, magnetic structures, mineralisation. spectral analysis.

 

ABSTRACT

In this paper, the mineralization potential of Iperindo and its environs have been investigated using satellite remotely sensing and geophysical methods. The area of study lies within Ilesha schist belt of the Precambrian Basement Complex of Southwestern Nigeria. The integrated approach facilitated the assessment of the subsurface geology with the purpose of delineating the geological features and their implication on mineralization potential of the study area. The investigation involved the use of the extracted lineaments from Landsat Thematic Mapper imagery to compliment results of interpreted magnetic field intensity over the study area. Aeromagnetic data acquired from Nigeria Geological Survey Agency was interpreted using spectral analysis and Euler deconvolution of the processed magnetic anomaly map over the area. Enhancement of the magnetic anomalies observed from the interpreted magnetic anomaly map involved the use of reduction to equator, wavelength, upward continuation and derivative filters. The 3-D Euler deconvolution and radial spectral analysis were applied to locate and estimate the depth to various anomalous bodies, with depth to source body between 50 m and 500 m. The processed images revealed lineaments trending majorly in NE-SW directions diagnostic of primary structures of potential targets for mineralisation in the area. Generally, coincidence of both Landsat and aeromagnetic lineaments trends were observed in the study area, which suggested that these lineaments reflect real continuous fault/fractures in depth.

 

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