Assessment of Gypsum Mineralization in Edo State, South-South Nigeria.
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Date
2011
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Records of Nigerian Geological Survey Agency (NGSA)
Abstract
An assessment of the gypsum deposit in Edo State was undertaken in a bid to appraise the extent, quality, quantity and economic viability of the deposit. Field studies revealed that the gypsum occurs within the grey shale and the clay shale overlying the basement around Sabongida-Ora, Afuze, Warake and Aviele areas located within the 1:50,000 sheets 283 (Ifon N.E.) and 284 (Ubiaja) areas of Edo State in the southwestern Nigeria. The mode of occurrence of the gypsum is mainly as thin flat bands and beds, vertical to sub vertical fracture-filling veins and dispersed, poorly developed granular crystals within the host shale. Mineralogical studies show that the gypsum occurs mostly in form of selenite, satinspar and gypsite while iron in form of ferrous carbonate (siderite) occurs as accessory. Chemical analysis of samples revealed that the gypsum is composed of 66% 95% Calcium Sulphate (CaSO4.2H2O) and Siderite (FeCO3) as accessory. The composition and purity of Edo gypsum indicate that it is potentially suitable for use in cement industry, POP and other construction additives.
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Citation
Adeoye F. A., Oriere L. and Ajadi J. (2011). Assessment of Gypsum Mineralization in Edo State, South-South Nigeria. In Records of NGSA, vol. 16, pp 44 - 67