Investigation of Magnetic Anomalies of Ubiaja and Illushi Areas in Northern Anambra Basin Using Aeromagnetic Data

Description

Download Investigation of Magnetic Anomalies of Ubiaja and Illushi Areas in Northern Anambra Basin Using Aeromagnetic Data. Physics and Astronomy students who are writing their projects can get this material to aid their research work.

Abstract

The aeromagnetic data of Ubiaja and illushi area that fall within latitude to  and longitude  to were interpreted qualitatively and  quantitatively. The qualitative interpretation revealed that the area is intensely faulted with major anomalies (faults) trending in the northeast and southwest directions.

Standard Euler deconvolution, source parameter imaging (SPI), spectral analysis and modelling (forward and inverse) methods were employed in the quantitative interpretation aimed at determining the depth or thickness of the sedimentary basin, magnetic susceptibilities and type of mineralization prevalent in the area.

The results obtained by employing SPI have shown the minimum to maximum depths of 258.2 m to 3497.7 m of anomalous source bodies.

Applying standard Euler deconvolution method for the structural index (SI), the depth obtained for SI = 0.5 ranges from 1377.3 m (outcropping and shallow magnetic bodies) to 2510.9 m (deep lying magnetic bodies).

For SI = 1, the depth to magnetic source ranges from 1482.0 (outcropping and shallow magnetic bodies) to 3003.3 m (deep lying magnetic bodies).

Introduction

Minerals and hydrocarbon play vital roles in the socio-economic development of a country. Before the colonial era to the era of the 1960‘s, the search for mineral deposits and  hydrocarbon has been a major business challenge in Nigeria.

It is no doubt that the foundation or basis of the Nigerian economy has been the solid minerals and now the booming oil sector since over 80% of the nation economy depends greatly on it (Obiora et al., 2015).

Since it mostly done all the exploitation of hydrocarbon in Nigeria in the Niger delta, it will benefit the country if other sedimentary basin such as the Anambra basin is explored.

Anambra basin where Ubiaja and Illushi fall is one of those basins being suspected to have hydrocarbon and solid minerals prospect.

Magnetic method is a geophysical survey technique that exploits considerable  differences in the magnetic properties of minerals with respect to the ultimate objective of characterizing the earth‘s subsurface.

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