There has been no material change in the attributable Group Mineral Resource estimate which reduced by 2.2Moz Pt. The change is largely attributable to depletion. The estimate as at 30 June 2019 is dominated by Zimplats and Impala, which on a combined basis, contribute some 74% of the total attributable Group Mineral Resources.
Overall the attributable Group Mineral Reserve estimate remains static at 21.2Moz Pt. The resultant estimate as at 30 June 2019 is based on production depletion being offset by modest increases in Mineral Reserves at Zimplats. Some 53% of the attributable Group Mineral Reserves (Pt) is located at Zimplats and a further 32% at Impala.
Mineral Reserve sensitivity
The deeper Rustenburg Mineral Resources beyond current
infrastructure investment require a real basket price of
between R33 000 and R36 000 per Pt oz (US$2 550). This
suggests that future investments at Impala will at best be
marginal under the current price assumptions.
Platinum Mineral Reserve and depth range for individual Implats shafts
The updated allocation of Implats’ Mineral Reserves per shaft infrastructure as at 30 June 2019 is depicted in the accompanying
graphic illustration. The range in depth below surface and quantum relating to the infrastructure is shown below and depicts among
others the advantage at Zimplats in this regard, both from a depth and a size perspective.