Browsing by Author "Bupwatda, K.R."

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    Geology and Hydrogeophysical Appraisal of Angwan-Doruwa, Parts of Jama’a Sheet 188 NE, Central Nigeria
    (Department of Geology and Minning Nasarawa State University Keffi, 2019-01-01) Ancho, M.I.; Kaineh, A.S.; Baba, Adama Oleka; Bupwatda, K.R.
    Fresh water is essential for living but not readily available for use everywhere especially in most rural communities. Inhabitants of Angwan Doruwa and its environs, within latitude N8°56ꞌ37ꞌꞌ to N8°59ꞌ45ꞌꞌ and longitude E8°10ꞌ00 ꞌꞌ to E8°13ꞌ23ꞌꞌ parts of Jama’a Sheet 188 NE, in North Central Nigeria depend largely on surface water from streams which is prone to contamination and could lead to a rise in ill health already being experienced by the people. This prompted the need to conduct geological and hydrogeophysical studies to locate suitable underground aquifers where potable groundwater can be exploited in the area. Three methods employed in this study include; geological mapping, thin section analysis and electrical resistivity geophysical survey. Schlumberger configuration was used to investigate 15 stations within the area. Geological mapping revealed that the area comprises of migmatitic gneiss, biotite gneiss and leucocratic granite with joints trending in the NNE – SSW principal direction. Result of petrographic analysis showed presence of biotite, quartz, orthoclase, plagioclase, muscovites, perthite, microcline and amphibole as the common rock forming minerals in the area. Interpreted geophysical data revealed maximum of five and minimum of three geo-electrical layers: topsoils (TS), lateritic soils (LT, LS), weathered basement (WB) layer consisting of weathered rock fragments or regolith (R), fractured layer (FRB) and fresh basement layer (FB). The weathered and fractured basement layers have sufficient thicknesses (10 m to 30 m) to retain and transmit groundwater and therefore constitute the aquifers in the study area. The fractured basement layer at a depth of 40 m to 50 m constitutes the main aquifer in Angwan Doruwa with a very good groundwater potential while the weathered basement layer at a depth of 25 m to 35 m constitutes a good aquifer in adjoining villages. Drilling can best be achieved through the use of down-hole hammering method.