Environmental impact assessment of artisanal mining in parts of Isin LGA, southwestern Nigeria

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dc.contributor.authorIge, O.O.
dc.contributor.authorJerry, A.Y.
dc.contributor.authorOlaleye, I.M.
dc.date.accessioned2023-06-07T09:24:29Z
dc.date.available2023-06-07T09:24:29Z
dc.date.issued2022
dc.description.abstractImpact of artisanal mining in parts of Isin LGA, southwestern Nigeria was carried out to ascertain the level of degradation to the immediate environment. Samples from rocks, mines tailings, mine ponds water and rivers and groundwater from immediate community were analysed to assess concentration of elements in the media. Rocks of the study area consist mostly of schist, amphibolite, quartzites and pegmatites. Field relationship revealed that schist and amphibolite were intruded by pegmatites and quartzites thus forming foliations whose major trends are NNESSW and eastward dip direction. Petrographic studies show that the dominant minerals are quartz, biotite, plagioclase, microcline, hornblende, orthoclase and opaque minerals. Geochemistry of the solid media revealed average abundance in order of Fe>Mg>K>Ca>Na>Mn>Cu>Zn>Ni, whereas pollution assessment indices using enrichment ratio revealed that the area is unpolluted. Hydrochemical facies of the water using Piper’s diagram show that majority of the samples belong to Ca2+-Mg2+-HCO3- +CO32- with dominance of Ca2++Mg2+ over Na+ +K+ as well as HCO3- +CO32- over SO42- +Cl- while Gibbs diagram indicated an interplay of rock-precipitation dominance. Assessment for irrigation purposes using sodium and magnesium hazards, Sodium Adsorption Ratio, Kelley’s ratio and Wilcox Plot revealed the suitability. Though concentrations of evaluated parameters indicated low level degree of pollution, continuous opening of mining sites for exploitation and consequence reactions with water bodies may spike up the level of concentration of base metals in the surface and groundwater with resultant great threat to health of plants, animals and humans.en_US
dc.identifier.urihttps://uilspace.unilorin.edu.ng/handle/20.500.12484/11020
dc.language.isoenen_US
dc.publisherWater Utility Journal, E.W. Publicationsen_US
dc.subjectOdu-Eku; artisanal mining; enrichment; water chemistry; facies; piperen_US
dc.titleEnvironmental impact assessment of artisanal mining in parts of Isin LGA, southwestern Nigeriaen_US
dc.typeArticleen_US

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