IJG  Vol.5 No.8 , July 2014
Geoelectrical Inversion Study of Limestone Attributes at Mayo Boki Area (Northern Cameroon)
Abstract: A geoelectrical survey using the electrical resistivity method was carried out in the Mayo Boki (Northern Cameroon), to investigate the subsurface layering and evaluation of the limestone characteristics. In addition to geological data collection, three vertical electrical soundings and one electrical resistivity profile were measured. Joint interpretation of the DC data allows us to obtain reliable 1D models of the resistivity distribution. The interpretation of the field data was carried out using the RES2DINV software, which converts the apparent resistivity as a function of electrode spacing to the true resistivity as a function of depth in two dimensions. The results obtained from the electrical resistivity survey showed that: 1) A limestone layer was put in evidence at a depth of 4 m and the thickness varies from 13 m to 44 m; 2) The limestone layer resistivity is ranged from 125 to 2410 ohm.m; 3) An area of probable limestone deposit with interesting thicknesses have been identified. These facts are useful for future mining exploration as drilling map definition and operations. The geologic section of a nearby location termed resistivity profile was delineated and its total depth was found to be 57 m, which corroborates the lithologs of the boreholes from the area. The correlation of geological data and the geoelectric section has led to envisage pursuing exploration activities. Based on the limestone layer characteristics extracted from this DC investigation, the exploration drilling operations have to be initiated in order to define the limestone resource over the area of study, which will certainly enables to built the exploitation project prefeasibility document.
Cite this paper: Ndougsa-Mbarga, T. , Joseph, Q. , Assatsé, W. , Meying, A. and Stéphane, P. (2014) Geoelectrical Inversion Study of Limestone Attributes at Mayo Boki Area (Northern Cameroon). International Journal of Geosciences, 5, 816-825. doi: 10.4236/ijg.2014.58072.

[1]   Shahabi, R.S., Kakaie, R., Ramazani, R. and Agheli, L. (2009) Estimation of Production Function for Mines in Iran. Journal of Geology and Mining Research, 1, 19-24.

[2]   Atakpo, E. (2009) Hydrogeological Deductions from Geoelectric Survey in Uvwiamuge and Ekakpamre Communities, Delta State, Nigeria. International Journal of Physical Sciences, 4, 477-485.

[3]   Toteu, S.F. (1990) Geochemical Characterization of the Main Petrographical and Structural Units of Northern Cameroon, Implication for Panafrican Evolution. Journal of African Earth Sciences, 10, 615-624.

[4]   Njel, U.O. (1986) Paleogeographie d’un Segment de l’Orogenese Panafricaine, la Ceinture Volcano-Sedimentaire de Poli (Nord Cameroun). Compte Rendu de l’Academie des Sciences, 30, 1737-1742.

[5]   Pinna, P., Calvez, J.Y., Abessolo, A.A., Angel, J.M., Mekoulou-Mekoulou, T., Mananga, G. and Vernhet, Y. (1994) Neo-Proterozoic Events in the Tchollire Area, Pan African Crustal Growth and Geodynamics in Central-Northern Cameroon (Adamawa and North Provinces). Journal of African Earth Sciences, 18, 347-353.

[6]   Toteu, S.F., Penaye, J., Deboule, E., Van Schmus, W.R. and Tchameni, R. (2006) Diachronous Evolution of Volcano-Sedimentary Basins North of the Congo Craton: Insights from U-Pb Ion Microprobe Dating of Zircons from the Poli, Lom and Yaounde Series (Cameroun). Journal of African Earth Sciences, 44, 428-442.

[7]   Telford, W.M., Geldart, L.P. and Sherif, R.E. (1990) Applied Geophysics. 4th Edition, Cambridge University Press, Cambridge, 860.

[8]   Ezomo, F.O. and Ifedili, S.O. (2011) Geophysical Study of Limestone Attributes at Abudu Area of Edo State, Nigeria. Journal of Emerging Trends in Engineering and Applied Sciences, 2, 795-800.

[9]   Basokur, A.T. (1984) A Numerical Direct Interpretation of Resistivity Sounding Using the Pekeris Model. Geophysical Prospecting, 32, 1131-1146.

[10]   Ghosh, D.P. (1970) The Application of Linear Filter Theory to the Direct Interpretation of Geoelectric Resistivity Measurements. Geophysical Prospecting, 19, 192-217.

[11]   Koefoed, O. (1979) Geosounding Principles 1: Resistivity Sounding Measurements. Elsevier Science Publishing Company, Amsterdam.

[12]   Loke, M.H. and Barker, R.D. (1996) Rapid Least-Square Inversion of Apparent Resistivity Pseudo-Section by a Quasi-Newton Method. Geophysical Prospecting, 44, 499-523.

[13]   Pirttijarvi, M. (2009) Joint Interpretation of Electromagnetic and Geoelectrical Soundings Using 1-D Layered Earth Model. User’s Guide for Version 1.3, 48 p.

[14]   Ngako, V., Affaton, P. and Njonfang, E. (2008) Pan-African Tectonics in the Northern Cameroon, Implication for the History of Western Gondwana. Gondwana Research, 14, 509-522.