Geochemical and Hydrogeochemical Characterization of Limestone Deposits of Okeluse Area, Southwestern Nigeria

International Journal of Geoinformatics and Geological Science

© 2022 by SSRG - IJGGS Journal

Volume 9 Issue 1

Year of Publication : 2022

Authors : Thompson Henry Tolulope Ogunribido, Mercy Modupe Ogungbamila

10.14445/23939206/IJGGS-V9I1P102

How to Cite?

Thompson Henry Tolulope Ogunribido, Mercy Modupe Ogungbamila, "Geochemical and Hydrogeochemical Characterization of Limestone Deposits of Okeluse Area, Southwestern Nigeria," SSRG International Journal of Geoinformatics and Geological Science, vol. 9,  no. 1, pp. 13-20, 2022. Crossref, https://doi.org/10.14445/23939206/IJGGS-V9I1P102

Abstract:

The geochemical and hydrogeochemical studies were carried out to determine the suitability of Okeluse limestone for cement production and the potability of natural waters in that area. Five limestone samples were collected and subjected to X-Ray fluorescence analysis to determine major oxides and their percentages. Six water samples were collected and were tested for pH, temperature, turbidity, electrical conductivity, TDS, TSS, total hardness, calcium hardness as CaCO3, Ca2+, Mg2+, Na+, K+, Cl-, HCO32-, SO42-, PO43-, NO3-, Fe3+, Pb2+, Cr6+, Mn2+, Cd2+, Ni3+, Zn2+, Cu2+, As2+, and Co2+. Results for major oxides revealed that CaO content ranged from 46.46% - 52.22%, SiO2 from 1.52% - 5.1%. MgO, Fe2O3, and Al2O3 contents were 1.564%, 2.408% and 0.968%, respectively, while MnO, P2O5, K2O, Na2O and SO3 are very low in concentration. CaO shows an inverse relation to SiO2 and MgO, indicating a high degree of purity of the limestone. The limestone here is the magnesian type which is suitable for cement production. Hydrogeochemistry showed that the dissolved constituents originated from the weathering of rocks. The hydrogeochemical facies revealed Na-Cl and K-H-CO3 wat types. Water samples were contaminated by K+, Fe2+ and Cd2+; therefore, water is not potable. It has to be treated before use.

Keywords:

Hydrogeochemistry, limestone, okeluse, polluted, sedimentary.

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