ore reserves and mineral resources 2011 report - Anglo American ...

SECURING OUR FUTURE
ORE RESERVES AND MINERAL RESOURCES
CHANGES IN THE ORE RESERVES AND MINERAL RESOURCES FOR 2011
The figures represent Anglo American Platinum Limited’s attributable interests.
ORE RESERVE AND MINERAL RESOURCE ESTIMATION SUMMARY
2011 2010
Million 4E million Million 4E million
tonnes troy ounces tonnes troy ounces
Category (Mt) (4E Moz) (Mt) (4E Moz)
Ore Reserves – South Africa 1,479.1 176.1 1,379.7 165.5
38.7 4.7 41.7 5.1
Ore Reserves 1 – South Africa and Zimbabwe 1,517.7 180.8 1,421.3 170.6
Mineral Resources exclusive of Ore Reserves – South Africa 5,399.1 639.2 4,882.6 619.5
79.5 10.5 77.6 10.3
Mineral Resources exclusive of Ore Reserves 2 – South Africa and Zimbabwe 5,478.6 649.7 4,960.2 629.8
Mineral Resources inclusive of Ore Reserves – South Africa 6,881.5 841.2 6,222.4 804.8
123.4 16.6 124.3 16.7
Mineral Resources inclusive of Ore Reserves 2 – South Africa and Zimbabwe 7,004.9 857.8 6,346.7 821.5
Ore Reserves 1 – South Africa tailings 18.9 0.5 21.8 0.8
Mineral Resources 2 – South Africa tailings 105.5 3.7 88.1 3.0
Note: The above Mineral Resources exclude the Boikgantsho and Sheba’s Ridge projects in South Africa and the Pedra Branca project in Brazil. These projects reflect a 3E grade which
is the sum of platinum, palladium and gold grades, whereas the other mines and projects reflect a 4E grade. For these projects see tabulation below:
2011 2010
Million 3E million Million 3E million
tonnes troy ounces tonnes troy ounces
Category (Mt) (3E Moz) (Mt) (3E Moz)
211.9 6.4 241.0 7.0
3 38.8 1.6 137.6 5.8
6.6 0.5 6.6 0.5
4 16.5 0.7
Mineral Resources inclusive of Ore Reserves 2 – South Africa and Americas 257.3 8.5 401.7 14.0
1
The Ore Reserves reflect the total of Proved and Probable Ore Reserves.
2
The Mineral Resources reflect the total of Measured, Indicated and Inferred Mineral Resources. The Mineral Resources are quoted after geological losses.
3
Boikgantsho Anglo American Platinum Limited (Amplats) and Anooraq Resources hold a 49% and 51% interest in Boikgantsho respectively. The figures quoted are for the
attributable interest.
During 2011, a new Resource evaluation was completed by Amplats. Significant changes to the previous estimates conducted in 2004 are owing to:
A cut-off grade of 1 g/t (3E) was applied (as used at Mogalakwena Platreef (1 g/t 4E)).
Exclusion of oxidised material up to a depth of 40 m.
The Resource evaluation reported to a depth of 300 m below surface.
Excludes losses owing to the major dykes and a swathe of 200 m either side of the major Drenthe fault, which has a horizontal displacement of approximately 2.2 km.
4
River Valley In previous years Amplats held an attributable interest of 50%. During 2011, Pacific North West Capital Corporation purchased the remaining 50% interest in the
unincorporated joint venture covering the River Valley Project from Amplats. As a consequence, the Mineral Resources are now excluded.
8 ANGLO AMERICAN PLATINUM LIMITED 2011