Browsing by Author "Essien, B.I."

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    Hydrochemical Investigation of Groundwater Around Sharuwa, Bauchi State, Northcentral Nigeria
    (Department of Geology and Minning, Nasarawa State University Keffi, 2011-12-12) Anudu, G.K.; Adeyeke, J.I.D.; Essien, B.I.; Obrike, Stephen E.
    The study involves the hydrochemical characterisation of groundwater from hand-dug wells within Sharuwa and its environs in order to ascertain the water chemistry and its suitability for human consumption, domestic and agricultural purposes. Results show that the waters are slightly acidic to slightly alkaline (5.70 = pH = 7.70), hard to very hard (124.7 = TH= 256 mg/l), fresh (210 = TDS = 380 mg/l) and characterised by electrical conductivity(EC) values between 30 to 2000 µS/cm as well as low sodium absorption ratio (0.061 = SAR = 0.646). Major cations and 2+ 2+ + + anions range as follows: Ca (21.0 46.0 mg/l), Mg (16.0 35.0 mg/l), Na (1.8 21.5 mg/l), K (4.5 23.5 mg/l), Fe - 2- - (1.11 3.88 mg/l), HCO (27.2 113.2 mg/l), SO (7.2 28.2 mg/l), Cl (0.06 2.2 mg/l. Values obtained for some trace 3 4 metals are as follows: Pb (0.65 4.18 mg/l) and Cu (1.16 3.33 mg/l). All the analysed parameters with exception of Fe, Pb, Cu were observed to be within the WHO (2006) standards for drinking water. Piper trilinear and Stiff diagrams show that sixty percent (60%) of the waters fall within the normal earth alkaline water type, while the remaining forty percent (40%) belongs to the alkaline earth water with higher alkaline proportion type. These waters have acquired their chemistry from the bedrock, cation exchange reaction and precipitation. They are considered to be suitable for drinking (when treated for these trace elements by the addition of coagulants and the use of reverse osmosis), domestic and agricultural purposes.
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    Hydrogeophysical investigation and estimation of groundwater potentials of the Lower Palaeozoic to Precambrian crystalline basement rocks in Keffi area, north-central Nigeria, using resistivity methods
    (Department of Geology and Minning, Nasarawa State University Keffi, 2012-03-08) Anuda, G.K.; Essien, B.I.; Obrike, Stephen E.
    The use of resistivity sounding and two-dimensional (2-D) resistivity imaging was investigated with the aim of delineating and estimating the groundwater potential in Keffi area. Rock types identified are mainly gneisses and granites. Twenty-five resistivity soundings employing the Schlumberger electrode array were conducted across the area. Resistivity sounding data obtained were interpreted using partial curve matching approach and 1-D inversion algorithm, RESIST ver- sion 1.0. The 2-D resistivity imaging was also carried out along two traverses using dipole–dipole array, and the data obtained were subjected to finite element method modeling using DIPRO inversion algorithm to produce a two-dimensional subsurface geological model. Interpretation of results showed three to four geoelectrical layers. Layer thickness values were generally less than 2 m for collapsed zone, and ranged from 5 to 30 m for weathered bedrock (saprolite). Two major aquifer units, namely weathered bedrock (saprolite) aquifer and frac- tured bedrock (saprock) aquifer, have been delineated with the latter usually occurring beneath the former in most areas. Aquifer potentials in the area were estimated using simple schemes that involved the use of three geoelectrical parameters, namely: depth to fresh bedrock, weathered bedrock (saprolite) resistivity and fractured bedrock (saprock) resistivity. The as- sessment delineated the area into prospective high, medium and low groundwater potential zones.
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    PRELIMINARY APPRAISAL OF CHEMICAL AND GEOTECHNICAL PROPERTIES OF CLAY DEPOSITS IN DOMA AREA, MIDDLE BENUE TROUGH, NIGERIA
    (Department of Geology and Minning, Nasarawa State University Keffi, 2011-06-06) Essien, B.I.; Obrike, Stephen E.; Anuda, G.K.; Iyakwari, Shekwoyandu
    A appraisal of the chemical and geotechnical properties o f the Dorna sedimentarp claps was conducted and consequently assessed for their possible industrial potential.The chemical analpsis o f samples repealed the predominance of ) 2.04-9.01%(,1:0٤)0,94- 3.94%/,7٧40000.83-1.10%/,04000.05-0,91%( ,* 2 0 )0.21-1.82%( 4/147420) 0.08-0.18%(. The characteristic physicalparameters o f the clap specimens included linear shrinkage (3.6-15.6%), plastic limit (15 20%), liquid limit (25 41%) andplasticitp index (5 20% ). 1716 chemical and geotechnical properties o f the Dorna claps indicated that they are potentially suitable for the production o f ceramics, pottery and refractorp bricks