Yunusa Adinoyi OMANAYIN1*, Muhammed Ademu USMAN1, Sharon Mercy MICHAEL1, Mutari LAWAL2, and Adegbe MAMODU1
1Department of Geology, School of Physical Sciences, Federal University of Technology, P. M.B. 065, Minna, Nigeria
2Department of Geology and Gemology, Faculty of Science, University of Abuja, P.M.B. 117, FCT Abuja, Nigeria
*Corresponding author’s Email: o.adinoyi@futminna.edu.ng; doi.org/10.55639/607.020100146
ABSTRACT
This study characterises the mineralogy, geochemistry, and economic potential of marble deposits in the Pibata area, part of Paiko Sheet 185NE, Nigeria. Field mapping reveals a migmatite-gneiss-schist-quartzite complex terrain, the marbles occur as pods and lensoids within mica schist of the Precambrian Basement Complex, structurally controlled by NE-SW trends associated with the Pan-African Orogeny. X-ray diffraction analysis showed a mixed composition averaging 66.80% calcite and 16.61% dolomite, with significant impurities including quartz, anthophyllite, and orthoclase. Geochemical data indicate moderate CaO (avg. 43.83%), elevated SiO₂ (avg. 12.60%), and high loss-on-ignition (avg. 35.41%). The marble is classified as siliceous, calcitic to dolomitic, derived from an impure limestone protolith that was metamorphosed under low- to medium-grade conditions. Trace element enrichment (e.g., Zr, V) reflects detrital sedimentary input. Economic appraisal demonstrates that, in its natural state, the marble may not meet purity standards for cement production, pharmaceuticals, chemicals, or high-value construction due to excessive silica, alkalis, and volatile content except if it is upgraded. However, its total carbonate content (85.10%) aligns with requirements for agricultural fertiliser and soil conditioning. The deposit is potentially suitable for use as agricultural lime based on its carbonate content, and for cement feedstock following beneficiation. This research provides a critical assessment framework for the sustainable utilisation of low-grade marble resources in similar settings.
KEYWORDS
Marble,
Geochemistry,
Characteristics,
Lime,
Aggregate.