Prospect Resources Ltd. said Aug. 3 that it recorded a 16% increase in the total mineral resource at the Arcadia lithium deposit in Zimbabwe to 66.6 million tonnes grading 1.13% lithium oxide, or Li2O, at a 0.2% cutoff.
The measured resource is estimated at 10.2 million tonnes grading 1.16% Li2O, and the indicated resource is estimated at 37.8 million tonnes grading 1.07%. Inferred resource now stands at 18.6 million tonnes grading 1.25% Li2O.
The company attributed the increase to the conversion of resources from the inferred category into indicated and measured categories.
The updated resource classification allows for the further optimization of the deposit's pit inventory and ore reserves that were declared as part of the prefeasibility study completed in July, which estimates a US$139 million net present value, discounted at 10%.