Department of Geology and Mining

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Browsing Department of Geology and Mining by Author "Adekeye, J.I.D."

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    GEOCHEMICAL SOIL SURVEY OF ERUKU AND ENVIRONS SOUTH WESTERN NIGERIA
    (Department Of Geology and Mining Sciences, Nasarawa State University Keffi., 2015-09-26) Omorinoye, O.A.; Adekeye, J.I.D.
    Geochemical exploration of Eruku and its environs within Osi Migmatite gneiss complex and Egbe Schist belt was carried out using soil survey. A total twenty five samples collected from the B-horizon at a depth of20cm-25cm were selected and analysed for trace and rare earth element concentration. The analytical results were subjected to multivariate statistical analysis; univariate analysis and geochemical distribution map (Isograde) were also plotted for the elements. The multivariate statistical analysis reveals a total of eleven factor groups, five of which are related to mineralization. The correlation coefficients of some selected elements show that Be is strongly correlated with Rb, Ga, Sn and Ta while Nb is strongly correlated with Ta. The area and bar charts show that the highest concentrations of Be, Nb, Sn and Ta are in the northeastern part of the study area. The isograde plots show that almost all the elements have their peaks in the northeastern part of the study area. The integration of all the analysis reveals that the study area has anomalous concentration of cassiterite, tantalite and columbite minerals hosted by pegmatites that intrude the country rocks. This work in Eruku therefore establishes similarity in the mineralization type and their host rock with those in Egbe.
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    GEOLOGICAL AND GEOCHEMICAL ASSESSMENTS OF STREAM SEDIMENTS OF EJUKU AREA
    (Department of Geology and Mining Nasarawa State University Keffi., 2016-01-01) Alebiosu, M. T.; Adekeye, J.I.D.; Adedoyin, A. D.
    Geological and Geochemical assessments of Ejuku area, North-Central, Nigeria, was carried out with the aim of identifying the mineralization potential as well as delineating mineralized zones in the area. The geological investigation revealed that the area is underlain by porphyritic granite, medium-coarse granite, granitic and banded gneisses, amphibolite, quartzite and mica schist. Twenty five representative stream sediment samples were digested in aqua regia solution and analyzed by ICP-MS method for trace and rare earth elemental concentrations. The analysis of the stream sediment samples, revealed the following range of concentration for each element: Fe (0.59-4.97%), Mn (60-1273 ppm), Ce (19.3-608 ppm), La (2.5-307.5 ppm), Ba (8.5-149.8 ppm), Cr (9.0-125.2 ppm), V (3-121 ppm), Cu (6.78-40.10 ppm), Pb (2.18-30.19 ppm), Zn (3.7-44.0), Ag (2-24ppb), Ni (2.9-13.6 ppm), Co (0.9-18.6 ppm), U(0.57-11.18 ppm), Th (3.0-76.5 ppm), Rb (5.7-46.9 ppm), Au (0.2-0.9 ppb), Y (0.81-27.79 ppm) and Li (1.2-17.2 ppm). The correlation coefficient for the selected elements show very strong correlation between Pb, Co, Fe, Ba and Mn as well as between Th, La, Rb, Ce, Zn and Y. The isograde plots show that most elements have their peaks in the western and northeastern part of the study area. The study therefore revealed that the area is rich in manganese, iron, K-feldspar and mica which are hosted, possibly, by schist and amphibolites.