TSX-listed Montero and Exploration has filed its maiden lithium and tin resource estimate for the Uis Tailings Project on SEDAR.
The Uis project is in Namibia and consists of large coarse sands and fine slimes tailings waste deposits on surface. The tailings material represents the waste processed material derived from the Uis pegmatite tin mine, the largest tin mine in Africa, prior to its closure in 1990. The independent estimate was prepared by Deloitte Technical Mining Advisory.
According to Dr Tony Harwood, president and CEO of Montero, the NI 43-101 Mineral Resource estimate is based on the preliminary drilling programme of 63 air core drill holes on the coarse and fine tailings waste material.
“The quantity and grade of coarse and fine material for six tailings deposits (zones A to E) were estimated by ordinary kriging. Two commodities were considered in the estimation of the Mineral Resources, lithium (Li2O) and tin (SnO2). Zone A represents the largest tailings deposit and contains coarse tailings material, while Zones B to E and Zone A finds represent the fine tailings material,” says Harwood.
A total Inferred Mineral Resource of 14.4 million tonnes at 0.37% LiO2 and 17.1 million tonnes at 0.05% SnO2 is estimated. Insufficient test work on lithium extraction has been completed on the 2.71 million tonnes of fine tailings material (Zones A4, B, C, D and E) to include this lithium in the resource estimate at this time. Commodity price, product, mining and processing costs and recoveries and mining parameters and assumptions informed the determination of cut-off grades.
Harwood says that the inferred mineral resource estimate at Uis Tailings Project is encouraging as it supports the presence of a significant quantity of lithium and tin material that is amenable to extraction.
“Further in-fill drilling and metallurgical test work is required to upgrade the Inferred resource to an Indicated resource. Montero is evaluating early production scenarios with potential partners in order to meet expected demand with the growth of electric vehicles (EVs) and battery metals requirements,” says Harwood.