Abstract:
Reconciliation of mineral resource model with grade control model of the Teberebe
orebody had some important variations. These were very significant where there were
inadequate drill hole data and geological interpretation. Grade control drilling produced
more geological data and allowed for improved interpretation of the geology. There was
therefore the need to remodel the mineral resource with the additional data obtained from
grade control drilling. Ordinary kriging was used to re-evaluate the mineral resource.
The study indicated that the new model reconciled practically better with the grade
control model than the old one. It produced lower grade but higher tonnage than the old
model using the same cut-off grade of 0.56 g/t. It also produced higher total gold
recovered than the older one. The new resource model, unlike the old one, included the D
zone of the orebody. It was recommended that grade control, sampling and modeling
should include the D zone.
