Geological and Geochemical Assessment of Stream Sediments of Ejuku Area.
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Date
2016
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Abstract
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.
Description
Research Paper
Keywords
Mineralization, Geochemical, Stream sediments, correlation, Isograde, Ejuku.