ELECTRICAL RESISTIVITY IMAGING FOR CHARACTERIZATION OF COAL BEARING LAYERS AT ODAGBO VILLAGE, KOGI STATE, NIGERIA
ELECTRICAL RESISTIVITY IMAGING FOR CHARACTERIZATION OF COAL BEARING LAYERS AT ODAGBO VILLAGE, KOGI STATE, NIGERIA
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Date
2021-05
Authors
IDOGBE, Eugene Anibe
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Abstract
Coal is considered as a vital energy mix that build the bedrock of energy access and bridge
the energy demand gaps between different countries of the world. The search for Coal at an
old mine working in Odagbo village is being carried out by artisan miners who
indiscriminately dig underground tunnels in search of Coal.This approach is imprecise,
laborious, and harmful to miners and may create geohazards that affect the community and
potential coal resources.Electrical resistivity imaging was carried out at a mining site in
Odagbo village Kogi state, Nigeria. The research aimed to characterize Coal seam within
the study area. The study was targeted at determining the resistivity value associated with
the Coal seam and the probable depth of the Coal seam. The LUND imaging system
consisting of the ABEM Terrameter SAS 4000, electrode selector ES 464, stainless-steel
electrodes, multi-core cables, and jumpers were used to acquire the data in this study. The
protocol chosen was the dipole-dipole array because of its supreme sensitivity to; resistivity
variation below the electrode in each dipole pair, horizontal variation of resistivity, and to
3D structures. Data processing was done using RES2DINV software. The result of the
resistivity imaging revealed three layers of earth materials closely related to resistivity
values at a depth of about 30 m from the ground surface. The first layer had resistivity
values averagely greater than 700 Ωm. The second layer had resistivity values lower than
2200 Ωm. This layer is probably the host of the coal seam. The third layer had resistivity
values greater than 700 Ωm. Coal seams are probably more at the North-East of the survey
area and the coal seam is suspected to have resistivity values ranging from about 67 Ωm to 549 Ωm and depth varying from 12 m to 25 m.
Description
A THESIS SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES,
AHMADU BELLO UNIVERSITY, ZARIA
IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF
MASTER OF SCIENCE DEGREE IN APPLIED GEOPHYSICS
DEPARTMENT OF PHYSICS,
FACULTY OF PHYSICAL SCIENCES,
AHMADU BELLO UNIVERSITY,
ZARIA, NIGERIA
Keywords
ELECTRICAL RESISTIVITY IMAGING,, CHARACTERIZATION,, COAL BEARING LAYERS,, ODAGBO VILLAGE,, KOGI STATE,, NIGERIA