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Geology and geochemical assessment of metal contamination of stream sediments at Igun and its environs, Ilesha area south western Nigeria

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doi: 10.5539/jgg.v6n1p14
Authors:Akintola, A. I.; Adebisi, N. O.; Ikhane, P. R.; Bankole, S. I.; Olaleye, F.
Author Affiliations:Primary:
Olabisi Onabanjo University, Department of Earth Sciences, Ago-Iwoye, Nigeria
Other:
University of Lagos, Nigeria
Volume Title:Journal of Geography and Geology
Source:Journal of Geography and Geology, 6(1), p.14-27. Publisher: Canadian Center of Science and Education, Toronto, ON, Canada. ISSN: 1916-9779
Publication Date:2014
Note:In English. 9 refs.; illus., incl. 11 tables, geol. sketch map
Summary:The cause of heavy metal contamination in stream sediments is probably related to mining activities in Igun study area. Hence the degree of contamination of major and trace elements was carried out to ascertain environmental impact assessment of Igun and its environs, the geology of the study area shows that talc schist, quartzite, amphibolite and granite are the major rock types within the study area, while petrographic studies show quartz, microcline feldspar, biotite, muscovite and hornblende as the main mineral constituents. Total numbers of ten (10) stream sediment samples were collected, air dried at room temperature and analyzed using inductively coupled plasma mass spectrometry (ICP-MS) techniques. From the result of geochemical analysis of the stream sediment samples, the mean concentration for trace elements revealed that Manganese (Mn), Strontium (Sr), Zinc (Zn), Gold (Au) Nickel (Ni), Cobalt (Co) and Lead (Pb) have the mean values of 1704 ppm, 75.11 ppm, 55.80 ppm, 40.22 ppm, 26.15 ppm, 20.94 ppm, 10.60 ppm respectively. The contamination of metals was noticed from the geo accumulation index (Igeo), for stream sediments such as Nickel (0.1), copper (0.5), Manganese (0.6) with Igeo < 1 depicting that these metals are practically uncontaminated. Cobalt (0.1), Zinc (1.1) with Igeo number > 1 < 2 are moderately contaminated and Gold with Igeo of (9.6) indicate very high contamination. In conclusion the results shows that some part of the study area are contaminated and this includes Imoo (location 4), Owena (location 9) and Oke-Ipa (location 1) compared to other locations in the study area which are not contaminated.
Subjects:Concentration; Correlation; Detection; Enrichment; Gneisses; Granites; Heavy metals; ICP mass spectra; Igneous rocks; Magmatism; Major elements; Mass spectra; Metamorphic belts; Metamorphic rocks; Mine waste; Plutonic rocks; Pollutants; Pollution; Provenance; Public health; Rivers and streams; Schist belts; Sediments; Sheet silicates; Silicates; Spectra; Substrates; Talc; Toxic materials; Trace elements; Trace metals; Africa; Congo Craton; Nigeria; West Africa; Geo-accumulation index; Igun Nigeria; Imoo Nigeria; Ismosan Nigeria; Oke-Ipa Nigeria
Coordinates:N043900 N044200 E0073500 E0073200
Record ID:813039-2
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute.
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