Influence of Construction Materials on Cut-Off Grade and Ore Reserve Determination: CaseStudy of Itakpe Deposit, CentralNigeria
Abstract
The presenceconstruction materialsin an ore deposit can add value to the deposit and
affect cut -off grade.In this paper , the influence of the presence of granite and aplites on
the cut-off grade and ore reserve of Itakpe Iron ore deposit has been studied. This study
was carried out by converting the values and production costs of the construction stones
to their main ore equivalent using some mathematic al models. The study shows that by
adding the value of the con struction materials to the value of the iron ore, cut -off grade of
Itakpe iron ore decreases from 30%Fe to 28.16%Fe. This corresponds to an increase of
mineable orereserve from 137.25mt to 151. 34mt given the operating economic
parameters.
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