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- ItemOpen AccessMICROSTRUCTURAL INTERPRETATION OF THE GARNET-SILLIMANITE- BEARING GRANITE GNEISS OF IKARE AREA, SOUTHWESTERN NIGERIA(Ife Journal of Science, 2023) Oziegbe, E. J.; Oziegbe, O.This study presents microstructures from the granite gneiss of the Basement complex of southwestern Nigeria. The granite gneiss of Ikare area comprises of the mineral assemblage; garnet, biotite, K-feldspar, quartz, plagioclase, sillimanite and opaque minerals. K-feldspar porphyroblasts have cuspate interstitial quartz grains, also quartz grains are included in K-feldspar. Most K-feldspar grains are highly strained and in some cases are fractured. Prismatic and fibrolite-type sillimanite are both present. Biotite is closely associated with fibrolite-type sillimanite. Sillimanite was observed to mimic the foliation produced by biotite. K-feldspar is the dominant mineral and could have formed by the dehydration reaction of biotite + plagioclase + quartz + sillimanite ==> garnet + K-feldspar + melt. Microscopic structures such as strained feldspar grains, micro-fractures in K-feldspar, simple twinning in K-feldspar, myrmekite, mimicking textures, microperthitic intergrowth and cuspate volumes of quartz surrounding K-feldspar are indicative of melt-bearing and solid-state deformation of regional metamorphic rocks.
- ItemOpen AccessEVALUATION OF SURFACE WATER-GROUNDWATER MIXING DYNAMICS IN A SHALLOW COASTAL AQUIFER USING INTEGRATED GEOPHYSICAL AND GEOCHEMICAL METHODS(Journal of Earth and Atmospheric Research, FUTA, Akure, 2020) Folorunso, A. F; Oloruntola, M.O; Agbaje, A.OThis research work evaluates the dynamics of surface water-groundwater mixing using an open-ended Lake of Ugbo-Nla and the adjoining groundwater of the shallow coastal wells as a prototype study of surface water–groundwater interaction in coastal environment. Ten (10) surface water samples were collected from the lake at different positions using research boat while another ten (10) groundwater samples were collected from different shallow wells within the community opposite to the sea. The water samples were analysed using Atomic Absorption Spectroscopy (AAS) to determine the elemental concentrations. In addition, three Electrical Resistivity Tomography (ERT) profiles were equally established along the coast of the surface water body land-ward. Analysis of trace and major elemental compositions of water samples from the two water bodies reveal possible interaction between them. The ERT data also corroborate this interaction by showing low resistive zones at depth equivalent to the depth of the coastal shallow wells. Structure that mimic flow path was mapped out under profile 3 with high proximity to the surface water. The study has shown that active interaction exists between surface and underground water.
- ItemOpen AccessHydro-geophysical mapping of occurrences and lateral continuity of aquifers in coastal and landward parts of Ikorodu, Lagos, Southwestern Nigeria(International Journal of Energy and Water Resources, Springers, 2019) Oloruntola, M.O; Adeyemi, G.O; Bayewu, O.O; Obasaju, D.O
- ItemOpen AccessRADIO-NUCLIDES ASSESSMENT OF GRANITIC ROCKS FROM IKIRE, SOUTHWESTERN NIGERIA(2019) Oladeni, I. A.; Oziegbe, E. J.
- ItemOpen AccessCHARACTERIZATION AND UTILIZATION OF CLAYS FROM ORIGO AND AWO SOUTHWESTERN NIGERIA(Zibeline International, 2019) Oziegbe, E. J.; Olarewaju, V. O.; Ocan, O. O.