PETROGRAPHIC AND GEOCHEMICAL STUDIES OF IGBETI MARBLE SOUTHWESTERN NIGERIA IN RELATION TO IT’S ECONOMIC POTENTIAL
Author(s):
Joseph Ayofe Aderogbin, Roland Anthony Isibor
Keywords:
Meta-sedimentary, Silica Ratio (SR), Alumina Ratio (AR), Dolomitic, Calcitic,
Abstract
This work reports the results of the investigation carried out on Igbeti marble to determine its economic potential and suitability for cement production. Previous studies on the meta-sedimentary rocks of Igbeti area made no reference to the suitability of the marble as a potential cement raw material. The study area lies within latitude 8o 41'N and 8o42'N and longitude 4o05'E and 4o10'E of the Southwestern Basement Complex of Nigeria. Six fresh samples of marble were collected from old and current quarries. Thin sections were made and representative samples prepared for geochemical analysis using the Inductive Coupled Plasma Atomic Emission Spectrometric (ICP-AES) method. The mineralogy and modal analysis indicated the composition of the marble as calcite 88.49%vol, dolomite 4.71%vol, pyrite 1.97%vol, muscovite 1.44%vol, tremolite 0.78%vol, quartz and albite 2.81%vol. Result of geochemical analysis revealed the elemental composition, in part per million, of the marble as SiO2 (0.76-0.001), Al2O3 (0.16-0.001), Fe2O3 (0.47-.007), Na2O (0.47-.007), K2O (0.03-.001), P2O5 (0.02-.001), MnO (0.04-.02), silica and alumina ratios (0.906, 0.231) with relatively high MgO (21.81-.20.92), CaO (30.85-30.55) and LOI 46.7-47.4. Igbeti marble manifests dolomitic character with silica and alumina ratios falling below Ordinary Portland Cement recommended values of SR (2.28) and AR (2.41). Variation plot of Na2O/Al2O3 vs. K2O/Al2O3 indicated a meta-sedimentary origin for the marble. The marble is not suitable for cement production but can be upgraded to meet acceptable raw mix composition for cement production.
Article Details
Unique Paper ID: 149511

Publication Volume & Issue: Volume 6, Issue 12

Page(s): 582 - 589
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