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Investigating Geological Controls for Ground Water Distribution in the Basement Rocks of Kanke, Cent
Investigating Geological Controls for Ground Water Distribution in the Basement Rocks of Kanke, Central
Nigeria from Geophysical and Remotely Sensed Data.
1Goki, N. G., 2Ugodulunwa, F. X.O., 3Ogunmola, J. K., 4Oha, I. A. and 3Ogbole, J. O. The Basement Complex terrain of Kanke was studied using the integration of geophysical and remotely sensed data to evaluate the general geological controls that govern the distribution of ground water basins in the poorly weathered and fractured rocks. Interpreted resistivity depth sounding reveals a depth to basement values in meters to range from 15 to 35 while depth to water table measured from wells in the area range from 7 to 24 meters. The relationship between the shallow and most yielding aquifers are found to be inconsistent with the greatest depth to basement areas signifying that the aquifers are not sourced from weathered rocks but rather concentrated in fractured zones.Lineaments generated from Landsat ETM shows that highest concentration are located around areas of least measured resistivities and follow the pattern of distribution given by geophysical studies. Major NE – SW and minor NW – SE fractures does not yield any water especially around the far western flanks but the most yielding areas are those areas with high fracture densities. Ground water targeting therefore in the Kanke area should be focused on mapping fractures rather than weathered overburden. Department of Geology and Mining, Nasarawa State University, PMB 1022, KeffiDepartment of Geology and Mining, University of Jos, P.M.B 2084National centre for Remote Sensing, Jos 2136 Department of Geology, University of Nigeria, Nsukka
Published: January 10, 2007