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Abstract
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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
Submitted: June 07, 2012
Accepted: July 04, 2012
Published: July 25, 2012 |
Abstract:
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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.
Key words: Anisotropy, azimuthal, kaduna, offset wenner, schlumberger, , ,
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Cite this Reference:
N.K. Abdullahi, M.A. Batu and A.A. Masanawa, . Fracture Determination Using Azimuthal Schlumberger and Offsetwenner Array in Basement Complex of Northwestern Nigeria . Research Journal of Environmental and Earth Sciences, (07): 747-755.
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ISSN (Online): 2041-0492
ISSN (Print): 2041-0484 |
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