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Resources and Reserves
Two Rivers
Two Rivers holds contiguous old order mining rights over a total of 1,879 hectares on a portion of the farms Dwarsrivier.
Mine development targeting the UG2 Reef began in 2005 and the operation is still in a build-up phase. The mining layout is based on a mechanised bord and pillar design. The operation is managed by African Rainbow Minerals.
Merensky metals split
(3PGM+Au)(%)

UG2 metals split
(3PGM+Au)(%)

| as at 30 June 2007 | as at 30 June 2006 | ||||||
|---|---|---|---|---|---|---|---|
| Orebody | Category | Channel tonnes (millions) | Grade (g/t) 3PGE+Au | Pt oz (millions) | Channel tonnes (millions) | Grade (g/t) 3PGE+Au | Pt oz (millions) |
| Merensky | Indicated | 18.7 | 3.34 | 1.2 | 18.7 | 3.34 | 1.2 |
| Inferred | 3.9 | 3.16 | 0.2 | 3.9 | 3.16 | 0.2 | |
| UG2 | Measured | 13.7 | 4.55 | 1.1 | 13.1 | 5.17 | 1.2 |
| Indicated | 44.1 | 3.82 | 3.0 | 46.2 | 3.70 | 2.9 | |
| Inferred | 8.1 | 3.90 | 0.6 | ||||
| Total | 88.5 | 3.81 | 6.1 | 81.9 | 3.83 | 5.5 | |
| as at 30 June 2007 | as at 30 June 2006 | ||||||
|---|---|---|---|---|---|---|---|
| Orebody | Category | Mill tonnes (millions) | Grade (g/t) 3PGE+Au | Pt oz (millions) | Mill tonnes (millions) | Grade (g/t) 3PGE+Au | Pt oz (millions) |
| UG2 | Proved | 10.2 | 3.74 | 0.7 | 9.5 | 3.60 | 0.6 |
| Proved (Stockpile) | 0.2 | 3.71 | 0.06 | 1.0 | 3.60 | 0.1 | |
| Probable | 30.2 | 3.34 | 1.8 | 29.8 | 3.44 | 1.7 | |
| Total | 40.6 | 3.44 | 2.5 | 40.3 | 3.48 | 2.4 | |
Notes
- The figures in the above statement reflect the total estimates for Two Rivers as at 30 June 2007.
- Mineral Resources are quoted inclusive of Mineral Reserves.
- Grade estimates were obtained by means of ordinary kriging of UG2 and Merensky Reef borehole intersections.
- The modifying factors used in the UG2 Mineral Reserve calculations are based on mechanised bord and pillar mining operations.
- Both the Mineral Resource and Mineral Reserve classifications have been reviewed for the UG2 Reef. This resulted in the south-eastern fault block now being included in the Inferred Mineral Resource category as well as a small area in the north-western extremity now being classified as an Inferred Mineral Resource. The outline of the Mineral Reserve classified as Proved Mineral Reserve has been adapted.
- The mining schedule has been reviewed and the Mineral Reserve estimate updated. Additional footwall dilution has been allowed for, resulting in a slightly lower predicted overall head grade and an increase in tonnage.
- The Mineral Reserves quoted include the North open pit.
- The stockpile reported in FY2006 has been reduced.
- No additional work has been undertaken on estimating the Merensky Mineral Resource since the previous reporting period.
- The individual metal proportions for the Merensky Reef were derived by Implats.
- Rounding–off of numbers may result in minor computational discrepancies.
- More details regarding the Mineral Resources and Mineral Reserves can be obtained in the 2007 ARM Annual Report.



