Figures 1 and 2 shows the vlfem traverse and ves points superimposed on the geological map of the study area. The comprise the ewekoro, akinbo, oshosun, ilaro and benin dahomey basin forms one of a series of west african formations fig. Phd 1department of science laboratory technology osun state polytechnic iree, p. Modal composition of the quartz schist 1 2 345 6 7 quartz % 92 94 93 90 89. This assessment is required for groundwater resource development planning as well as monitoring. Interpretation of high resolution aeromagnetic data for. B 301 osun state nigeria 2department of physics olabisi onabanjo university, agoiwoye ogun state nigeria. These samples were subjected to chemical analyses to determine both cations and anions compositions of the groundwater. Groundwater potential assessment in a sedimentary terrain. The precambrian basement complex covers about 50% of nigeria and extends into the neighbouring countries of benin and cameroon. Petrostructural features of metaconglomerate in igarra and otuo, south western nigeria article pdf available in asian journal of earth sciences 101. Ojo title the july 28, 1984 southwestern nigeria earthquake and its implications for the understanding of the tec tonic structure of nigeria keywords description the july 28, 1984 southwestern nigeria. The precambrian basement complex of nigeria has been classified into.
Geology the study area lies within the southwestern part of the precambrian basement complex of nigeria. Tectonic environments and rare metal mineralization in. The northeastern part of the town is undoubtedly the. As such, petroleum is central to economy of nigeria, producing 80 percent of government revenues and 95 percent of export earnings. O adewoyin 1department of physics covenant university ota, ogun state, nigeria 2department of geology university of ilorin, kwara state, nigeria.
Enugu shale in anambra basin, south eastern, nigeria anozie h. Sc 2 odunaike rasaki kola phd 3 fasunwon olusola o. Rb versus nb y and nb versus y, and thta ratio combined with field observations and empirical information from the literature were used to infer the tectonic environments and sources of the rare metal mineralization in the pegmatites of komu area, southwestern nigeria. Thirty 30 boreholes were examined and samples were collected from these boreholes. Geology and geotectonic setting of the basement complex. Abstract the geochemistry of the major oxides, provenance and tectonic setting as well as the maturity status of the ode aye bitumenimpregnated sand tar sand are presented in this study.
A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Grain size and depositional pattern of sediment from. Geologic and geotechnical evaluation of an open landfill. Evaluation of terrain conditions in ilesa schistbelt. A geological map identifies and shows the distribution of various rock types in area.
Pdf an overview of the geology and hydrogeology of nigeria. The geology, stream sediment geochemical survey and. Area j4, southwestern, nigeria using the direct laboratory method to characterize the mica schist into different degrees of purity for both economic and commercial purposes. The sedimentary rocks which underlie about 4,000square miles 6,400km2 were mapped and described by jones 1964 while jones and hockey. Role of electrical resistivity method for groundwater exploration in hard rock areas. Analysis of physical parameters of limestone deposits in. The data set were total field aeromagnetic data sheet number 222 acquired during high resolution airborne geophysical surveys of nigeria between 2003 and 2009 by fugro airborne survey limited for nigerian geological survey agency. Geological setting and geophysical investigation on the studied area. The drillers lithological logs aided by gamma and resistivity logs, showed that the area is underlain by clays, sandysilty clays, clayey. The ancient town had a central market that linked people from the northern part of the country to the people of the south. Geochemistry of the ilesha granite gneiss in the basement complex of southwestern nigeria.
Grain size and depositional pattern of sediment from okeluse area, southwestern nigeria. A case study from fidiwoajebo areas of southwestern nigeria. Olaleye3 1department of physics, olabisi onabanjo university, agoiwoye, nigeria 2deapartment of chemical, geological and physical sciences, kwara state university, malete, nigeria 3department of earth sciences, faculty of pure and. It is the objective of this study therefore to update the classification of six of the most common soil series in southwestern nigeria in consonance with the knowledge of modern soil science. The occurrence of groundwater in nigeria is dependant primarily on the geology, and groundwater regions can be classified accordingly. Half of nigerias land is composed of three main basement complexes located in the west, the northwest and the southeast. Laboratory, esrtment of soil science, university of nigeria, nsukka. Nigeria has extensive natural resources and is the largest crude oil producer in africa and 20 billion barrels of reserves. Pdf photogeological study of the fold structure in.
Both crystalline and sedimentary rocks were represented in the study area. Precambrian geology of nigeria including the southwestern nigerian basement complex. Between these massifs, sedimentary basins are strung out along a northeastsouthwest axis from lake chad to the niger delta, i. Mineralogy and chemical nature of metautramafites in nigerian schist belts. Lagos is situated and enclosed in the southwestern nigeria, a coastal zone marked by lagoons and coastal creeks 14 emerged by sand ridges barrier beaches linked with sand accumulation 34. Photogeological study of the fold structure in okemesi area, southwestern nigeria article pdf available in journal of mining and geology 432 february 2008 with 163 reads how we. Sulphur forms distribution in soil profiles of different. Description and geological setting the study area figs. Atlantic margin basins that were initiated during the the abeokuta group is.
Geoenvironmental assessment of pegmatite mining site. The tectonic evolution of the dahomey basin, owes its genesis to the tectonic activities that accompanied the rifting and separation of african from south american plates, and the. Ako 2 1department of applied geophysics, federal university of technology, akure, nigeria 2department of geology, obafemi awolowo university, ileife, nigeria accepted 03 september, 2012. The study area belongs to the precambrian basement complex of southwestern nigeria which lies to the rest of the west african craton in the region of late. Geotechnical properties of lateritic overburden materials. The area under investigation is situated in the southwest ern part of the precambrian basement complex of nige ria figure 1.
Seismic refraction survey of tar sands deposits in ijebu. Thestudy area is underlain by the precambrian basement complex rock of southwestern nigeria rahaman. The eburnean event is marked by the emplacement of the ibadan granite gneiss in southwestern nigeria which has been dated 2500200ma rahaman 1988 and a pink granite gneiss at ileife southwestern nigeria dated 1875ma using upb on zircon. Role of electrical resistivity method for groundwater. Geophysical bvaluation of magnetic data of okenugbo area, agoiwoye, southwestern nigeria h. E have been analyzed with a view to investigate the possible extension of ifewara fault zone beyond ilesa area. Geophysical investigation of some flood prone areas in ota. The area of study lies within the basement complex rocks of southwestern nigeria figure 1 which is part of the pan african mobile belt lying to the east of the west african craton. The rareearth element ree concentrations of representative granite samples from the southeast of the obudu plateau, nigeria, were analyzed with an attempt to determine the signatures of their source, evolutionary history and tectonic setting. Factor analysis of stream sediment geochemical data from. The detailed geology can be grouped into surface and subsurface geology. Geophysical investigation of the possible extension of. Ogun state southwestern nigeria 1 raimi adepoju mufutau m.
Ten 10 deep boreholes with average depth of 300 m were drilled within the sedimentary basin. Geophysical evaluation of magnetic data of okenugbo area. The application of integrated geophysical methods in oil. Updated classification of some soil series in southwestern. A subsurface sequence delineation and saline water mapping of lagos state was carried out. Pdf petrostructural features of metaconglomerate in. Abuja leather is the oldest mining site in komu southwestern nigeria which lies within the basement lized pegmatite veins. Petrographic studies and paleoenvironmental reconstruction. The study area, ikpeshi and its environ lies within the precambrian basement complex of southwestern nigeria. Federal republic of nigeria council on foundations. The first seven samples were collected early in the morning before wells were opened for general use. Elizabethan publishing company, 1976 geology 436 pages. Assessment of groundwater system characteristics in ilorin. Department of geology, anambra state university, uli, anambra state, nigeria author for correspondence abstract source rock thermal maturation of campanian enugu shale in anambra basin, southeastern nigeria was assessed by rockeval pyrolysis.
Please see wikipedias template documentation for further citation fields that may be required. The boreholes were lithologically and geophysically logged. The southwestern nigeria falls between latitude 7 0n and 10 0n and longitude 2 0e and 7 0e which is made up of rocks which are mainly precambrian in age. The study area is located in part of osun state and ekiti state, southwestern nigeria. The surface geology is characterized by clay, lateritic soil and the crustal top layers. Federal republic of nigeria companies income tax act 19. Both have been described extensively by several authors in southwestern nigeria. O department of geology, ekiti state university ado ekiti. Ten 10 llected from seven 7 dugwells in april, 1997, were analyzed to assess the bacteriological quality of the groundwater. The survey was flown in drape mode using real time differential gps at a sensor mean. The data was interpreted using conventional partial curve matching. Several studies have also been carried out to evaluate the distribution of limestone deposits at ewekoro quarry.
Significant of geology and geophysical investigations in. Introduction owo, a town in ondo state, southwestern nigeria, is an agrarian community with some commercial activities. Iyanaiyesi and canaan land area of ota, southwestern nigeria figs. Okeila, ilupeju, soso, obasinkin, ayegunle, kajola and ajindo figure. Sc831912 title the geology and economic mineral deposits of areas around muro hill, nigeria faculty physical sciences department geology date february, 1987 signature. Geochemical analysis of shallow groundwater from ilorin metropolis was carried out with the aim of assessing the hydrogeochemical characteristics of the groundwater.
In addition to ecec method, several other methods will be used to evaluate the cec of these soils. The schist in the study area is foliated in nwse direction and some others ns, there is also occurrences of quartz veins, joints and fractures in the granite body. It was undertaken as part of a longterm plan initiated by the postgraduate research group of the department of applied geology, the federal university of technology, akure futa, nigeria to search for metallic mineralization, especially gold, in the district. The discrimination diagrams show that the pegmatites were mainly. The study areas which fall within osun state can be rated moderate due to interconnectivity of roads. University of nigeria research publications author anike, okechukwu luke pgm. A total of seven vertical electrical sounding ves was carried out using the schlumberger configuration with a maximum current electrode spacing ranging from 500 650m.
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