Impala Platinum
Impala Platinum Limited holds mining leases covering 12 085 hectares north-west of Rustenburg in the North West Province.

A mining licence covering a further 12 675 hectares was granted during 2001 over the lease extension area. In addition, Impala holds a mineral lease, granted by Rustenburg Platinum Mines, covering 496 hectares over a portion of the farm Boschkoppie 104 JQ, contiguous with Impala’s operations.

The tables below list Impala’s Mineral Reserves and Mineral Resources. The classification is based on the South African Code for Reporting of Mineral Resources and Reserves (the SAMREC Code).

Impala has undertaken extensive surface drilling, 2D and 3D seismic surveys which have provided confidence in the areas included in the Mineral Reserve and Mineral Resource statements.

Grade estimates are obtained by means of the ordinary kriging geostatistical method. Impala’s geostatistical database consists of over 50 000 sample sections (550 000 individual samples) obtained by underground sampling of development faces and stoping panels. In addition, over 800 reef intersections have been obtained by surface drilling (original boreholes and deflections).

The economic channel is generally defined by a marginal grade cut-off which ranges between 1.0 g/t and 1.5 g/t, except in areas where the channel is below the minimum mining width. The channel estimates are determined from a combination of geostatistical estimates and comparisons against historical information.

The modifying factors used to determine Mineral Reserves are based primarily on historical tonnage and grade dilutions together with planned improvements. These are derived from an in-house ore accounting system developed and refined over 8 years.

Proved Mineral Reserves refers to material available for mining without further development.

Grade estimates are based on inverse distance calculations for platinum, palladium, rhodium and gold combined (3 PGE + Au).

Winnaarshoek
Trojan Platinum (Pty) Limited holds mineral rights covering 4223 hectares in the Eastern Bushveld and in addition, has acquired a sub-lease covering 1273 hectares over a portion of the farm Driekop 253 KT from Rustenburg Platinum Mines Limited in exchange for a royalty.

The table below lists Trojan’s mineral resources, classified according to the SAMREC Code.

Extensive geological evaluation is ongoing at the properties to enhance and extend the Mineral Resources. The estimates below are derived from a total of 550 reef intersections (original boreholes and deflections). Grade estimates are based on inverse distance calculations.

All these reserves and resources have been verified by a competent person in terms of Section 4 of the SAMREC code.

Two Rivers, Zimplats, Mimosa and Aquarius
In addition to its own reserves and resources of 73,4 million platinum ounces, Implats has access to 37 million attributable platinum ounces through its equity participation in Two Rivers, Zimplats, Mimosa and Aquarius. The latter reserves and resources have not been defined in terms of the SAMREC code and have not been verified by the competent person. The extent of this interest is set out in the table below.