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2012 (Vol. 4, Issue: 07)
Article Information:

Fracture Determination Using Azimuthal Schlumberger and Offsetwenner Array in Basement Complex of Northwestern Nigeria

N.K. Abdullahi, M.A. Batu and A.A. Masanawa
Corresponding Author:  Nasir Khalid Abdullahi 

Key words:  Anisotropy, azimuthal, kaduna, offset wenner, schlumberger, , ,
Vol. 4 , (07): 747-755
Submitted Accepted Published
June 07, 2012 July 04, 2012 July 25, 2012
Abstract:

Two surface azimuthal resistivity sounding measurements employing the Schlumberger and offset Wenner arrays were conducted at the Kaduna Polytechnic main campus, Northwestern Nigeria. The objectives were to compare the two electrode arrays in detecting and delineation of fracture systems as an aid in identifying suitable areas for groundwater exploration, siting sewage and waste disposal sites. Resistivities as functions of azimuths are presented as polygons of anisotropy and the computed coefficient of anisotropy (λ) for the array varies between 1.12 to 1.29, 1.08 to 2.00 for the Schlumberger and offset Wenner arrays, respectively. These λ values are indicative of homogeneously anisotropic ground. However, analysis of the offset Wenner results was successfully used to differentiate between structures which have a 180 azimuthal symmetry (fracture anisotropy) and those which have a 360 azimuthal symmetry (dipping layer and lateral change in resistivity). The results of the survey show that the Offset Wenner array is the best field azimuthal resistivity sounding technique to determine sources of electrical anisotropy.
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  Cite this Reference:
N.K. Abdullahi, M.A. Batu and A.A. Masanawa, 2012. Fracture Determination Using Azimuthal Schlumberger and Offsetwenner Array in Basement Complex of Northwestern Nigeria .  Research Journal of Environmental and Earth Sciences, 4(07): 747-755.
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ISSN (Online):  2041-0492
ISSN (Print):   2041-0484
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