The Gboko Limestone, Yandev, Benue State, Nigeria: Geology, Geochemistry and Industrial Potentials
- 1 Department of Geology, Federal University of Technology, Owerri, Nigeria
- 2 GEM Executive Education, Grenoble Ecole De Management, Rue Pierre Semard Grenoble, France
- 3 Department of Geology, Federal University of Technology, Owerri, Nigeria
- 4 Department of Geology, Federal University of Technology, Yola, Nigeria
- 5 Department of Geology, University of Maiduguri, Maiduguri, Nigeria
- 6 Department of Geology, Federal University of Technology, Owerri, Nigeria
- 7 Department of Architecture, Federal University of Technology, Owerri, Nigeria
- 8 Department of Geology, Federal University of Technology, Owerri, Nigeria
- 9 Department of Geology, University of Jos, Jos, Nigeria
Abstract
The Cretaceous shallow marine Gboko limestone, Yandev, Nigeria is a component of the sedimentary fill of the 800 km NE-SW trending Benue Trough, Nigeria. The limestone is made up of thin bedded to massive limestone beds interspersed with laminated grey shale having foraminifera as the dominant fossil. The limestone has both mud supported and grain supported texture, and micrites constitute about 75% of the limestone. Bulk chemical composition analysis of the limestone reveals average CaCO 3 of 92.41% and a range of 77.50% - 99.00%. Mineralogical impurities include quartz, dolomite, pyrrhotite, fluorapatite etc. Trace elements concentration analysis was carried out using Energy Dispersive X-ray (EDXRF) spectrophotometry and showed the following trace elements: Mn (841.3 ppm), Sr (444.6 ppm), Fe (470 ppm), Zn (114.6 ppm) and Pb (116.4 ppm). Calcining the limestone in a laboratory muffle furnace at 1050°C for 90 minutes produced a compact, soft burnt porous and reactive lime that does not crumble into fines. The lime so produced neither meets the requirements of the Steel Making Shop (SMS) of the Ajaokuta Steel Plant nor could it be used in the growing sugar refining industry in Nigeria. It can however be used in the food and the food by-products industry, environmental, agricultural and petroleum industries etc. The raw stone remains a major source of raw materials for cement manufacture for the ever expanding building industry.
- Reyment, R.A. (1965) Aspects of Geology of Nigeria. Ibadan University Press, Ibadan, 145.
- Nair, K.M. and Ramanatham, R.M. (1989) Sedimentology, Stratigraphy and Paleogeographic Significance of Lower Cretaceous Gboko Limestone, Nigeria. Journal Mining and Geology, 21, 203-210.
- Murat, K.C. (1972) Stratigraphy and Paleogeography of the Cretaceous and Lower Tertiary in Southern Nigeria. In: Dessauvagie, T.F.J. and Whiteman, A.J., Eds., African Geology, University of Ibadan, 251-266.
- Lowestam, H.A. (1961) Mineralogy O18/O16 Ratios and Srontium and Magnessium Content of Recent and Fossil Brachiopods and Their Bearing on History of the Oceans. Journal of Geodesy, 69, 241-260.
- Morrow, D.W. and Mayers, I.R. (1978) Simulation of Limestone Diagenesis—A Model Based on Strontium Depletion. Canadian Journal of Earth Sciences, 369-377. https://doi.org/10.1139/e78-043
- Bausch, W.M. (1968) Outline of Distribution of Strontium in Marine Limestone. In: Muller, G. and Friedman, G.M., Eds., Recent Developments in Carbonate Sedimentology Central Europe, Berlin-Heidelberg, Springer, New York, 106-115. https://doi.org/10.1007/978-3-642-88052-0_13
- Lutke, F. (1976) Sedmentologische and Geochemiche un arsucheungen zur zennese der flinzfazies in zur (givet and oberden) dilsch. Geol. Ges, 127, 499-508.
- Ofulume, A.B. (2008) The Geology, Geochemistry and Economic Potentials of Some Nigerian Limestones and Marble Resources. Unpublished Ph.D. Thesis ATBU Bauchi, 142.
- Boynton, R.S. (1980) Chemistry and Technology of Lime and Limestone. Wiley Inter Science, 482.
- Ruskulis, O. (1997) Methods for Testing Lime in the Field. http://www.itdg.org./docs/technicalinformationservice/testinglime
- Anderson, L.C. and Vernon, J. (1971) Quality and Production of Lime for Basic Oxygen and Steel Making. The Quarry Managers Journal Institute of Quarrying Translation, 169-175.