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  Sci. Res. Impact.  

  5(5): 223-240, September 2019

 

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Scientific Research and Impact, Vol. 5(6), pp  223-240 September 2019

doi:1014412/SRI2019.240

(ISSN 2315-5396) 2019 Science Park Journals

Full Length Research Paper

 

ELECTRICAL RESISTIVITY IMAGING FOR METALLIC AND SULPHIDE DEPOSITS INVESTIGATION IN KAIAMA AREA, NORTH-CENTRAL NIGERIA.

S.A. Alimi1, R.B. Bale1, V.C. Alepa1, S. A. Aromoye1, T.W. Andongma2,D.S. Bonde3

 

1 Department of Geology and Mineral Sciences, University of Ilorin, Ilorin,  Nigeria

2Department of Geology,Kano University of Science and Technology, Wundil, Nigeria

3Department of Phsical Sciences, Kebbi  State Universityof Science and Technology,Aliero, Nigeria

 

 

 

 Abstract

 

Artisanal mining activities in Kaiama revealed the presence of metallic and sulphide mineralization in the area, but little is known about the nature and depth of mineralization in this area. Electrical Resistivity Imaging also known as Electrical Resistivity Tomography (ERT) is a fast developing technique that has the ability to show the lateral and vertical variation in subsurface electrical resistivity.This study used electrical resistivity Imaging to investigate the presence of metallic and sulphide mineralization in Kaiama area. The survey was carried out to obtain apparent resistivity values from areas suspected to have very high probability for metallic and sulphide mineralization from field study using Wenner-Schlumberger configuration. 14 profiles were selected for electrical resistivity survey with profile length that varied between 120 m to 150 m, an electrode spacing “a” that varied between 5 and 10 m, and n factor that varied from 7.5 to 15 m.The obtained apparent resistivity data were iteratively inverted using AGI EarthImager 2D software to generate the ERT. Geological mapping showed that metallic ores such as wolframite, cassiterite, tantalite, and gold are hosted within weathered pegmatite veins while sulphide ores such as pyrite, chalcopyrite, azurite, and malachite are concentrated within quartz veins. ERT showed that the lithology around the survey area can be classified into top soil, weathered basement, and fresh basement. The ores are concentrated in form of specs within the weathered basement with a depth range of 5 to 20 m and can be mined via pitting and trenching. The probable average depth to ore alluvium varies for each profile. Significant mineralization signatures (anomalies) were observed from the Electrical Resistivity Tomography (ERT) results; however, the signatures were more prominent in the pegmatites compared to the quartz veins which suggest that this method is best used when the ores are loosely held in soilsFollow up detailed exploration is expected to be worthwhile for delineating mineral targets in this area.

 

Keywords: Electrical Resistivity, Kaiama, Metallic Ores, Sulphide Ores, Wenner-Schlumberger, Kwara

 

                                                                                                       

 

 

            

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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