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SECURING OUR FUTURE ORE RESERVE AND MINERAL RESOURCE ESTIMATES as at 31 December 2011 Ore Reserve footnotes General Rustenburg mines Rounding of figures may result in computational discrepancies. 4E grade reported: sum of platinum, palladium, rhodium and gold grades. Rustenburg consists of five mines and owing to benefits of time/extraction, internal boundaries change year-on-year. However, for reconciliation purposes the entire Rustenburg area will be compared. Merensky Reef The total Ore Reserve tonnage decreased by 38% to 32.9 Mt (2010: 53.0 Mt) and the 4E ounce content decreased by 35% to 5.6 Moz (2010: 8.6 Moz). This was mainly owing to the following: Thembelani Mine – conversion of previously reported Ore Reserves back to Mineral Resources owing to economic assumptions: -17.7 Mt -2.9 Moz. Production depletion: -3.0 Mt -0.5 Moz. As a consequence of the conversion reallocation the total Proved Ore Reserves tonnage decreased by 28% to 29.9 Mt (2010: 41.7 Mt) and the 4E ounce content decreased by 24% to 5.2 Moz (2010: 6.9 Moz). UG2 Reef The total Ore Reserve tonnage increased by 22% to 186.9 Mt (2010: 153.3 Mt) and the 4E ounce content increased by 23% to 21.8 Moz (2010: 17.7 Moz). This was mainly owing to additional conversion of Mineral Resources to Ore Reserves at the following mines: Thembelani Mine: +26 Mt +3.5 Moz. Siphumelele Mine: +9.2 Mt +0.9 Moz. Khomanani Mine: +3.1 Mt +0.5 Moz. The increase in tonnage is offset by production depletion: -6.0 Mt -0.6 Moz. Owing to conversion of Mineral Resources to Ore Reserves the total Proved Ore Reserves tonnage increased by 23% to 165.8 Mt (2010: 134.5 Mt) and the 4E ounce content increased by 25% to 19.2 Moz (2010: 15.4 Moz). Tumela Mine Previously reported Ore Reserves have been reallocated back to Mineral Resources in the following areas: Portions of 4-shaft area as a result of mining engineering-related issues. In areas with complex geology causing unsafe conditions. Additionally, owing to the reduction in confidence for portions of 4-shaft area, the Reserve classification has been affected and the Proved Ore Reserves have been reclassified to Probable Ore Reserves. Merensky Reef The Ore Reserve tonnage decreased by 12% to 26.2 Mt (2010: 29.9 Mt) and the 4E ounce content decreased by 13% to 4.9 Moz (2010: 5.6 Moz). This was mainly owing to the following: Portions of 4-shaft owing to mining engineering-related issues (layout and design): -3.2 Mt -0.6 Moz. Production depletion: -0.5 Mt -0.1 Moz. The Proved Ore Reserve tonnage decreased by 92% to 1.0 Mt (2010: 11.9 Mt) and the 4E ounce content decreased by 91% to 0.2 Moz (2010: 2.2 Moz). UG2 Reef The Ore Reserve tonnage decreased by 15% to 126.6 Mt (2010: 149.4 Mt) and the 4E ounce content decreased by 15% to 19.4 Moz (2010: 22.7 Moz). This was mainly owing to the following: Portions of 4-shaft owing to mining engineering-related issues (layout and design) and owing to complex geology: -19.6 Mt - 2.8 Moz. Production depletion: -3.3 Mt -0.5 Moz. The Proved Ore Reserve tonnage decreased by 54% to 57.2 Mt (2010: 123.1 Mt) and the 4E ounce content decreased by 52% to 8.9 Moz (2010: 18.6 Moz). As a consequence of the reclassification of Proved to Probable Ore Reserves, the Probable Ore Reserve tonnage increased by 163%. Dishaba Mine Merensky Reef The Ore Reserve tonnage decreased by 2.7% to 15.5 Mt (2010: 16.0 Mt) but the 4E ounce content increased by 7.2% to 2.9 Moz (2010: 2.7 Moz) as a result of a change in the modifying factors; the Ore Reserve grade increased by 0.54 g/t from 5.25 g/t to 5.79 g/t. UG2 Reef The Ore Reserve tonnage decreased marginally by 0.6% but the 4E ounce content increased by 3.8% owing to changed modifying factors; the overall Ore Reserve grade increased by 0.20 g/t from 4.58 g/t to 4.79 g/t. Union Mine Amplats’ attributable interest is 85% of the Mineral Resources and Ore Reserves. The figures quoted are for the attributable interest only. Figures provided by Amplats. Merensky Reef The Ore Reserve tonnage decreased to 0.03 Mt owing to production depletion. The Ore Reserves will be mined out during 2012. UG2 Reef The Ore Reserve tonnage increased by 8.0% to 51.6 Mt (2010: 47.8 Mt) and the 4E ounce content increased by 15% to 7.3 Moz (2010: 6.3 Moz) as a result of additional converted Ore Reserves: +6.5 Mt +1.3 Moz. The increase in Ore Reserves is offset by production depletion: -2.7 Mt -0.4 Moz. 26 ANGLO AMERICAN PLATINUM LIMITED 2011
Mogalakwena Mine For the Mogalakwena Mine footnotes see Platreef comments on page 172. Twickenham Platinum Mine UG2 Reef The Ore Reserve tonnage increased by 6.0% to 77.8 Mt (2010: 73.4 Mt) and the 4E ounce content increased by 6.4% to 13.5 Moz (2010: 12.7 Moz) mainly owing to additional conversion from Mineral Resources to Ore Reserves. Modikwa Platinum Mine Amplats’ attributable interest is 50%. The figures quoted are as at end of December 2011 and reflect the attributable interest only. UG2 Reef figures reported are as per Modikwa Platinum JV management. UG2 Reef The Ore Reserve tonnage decreased by 1.1% to 27.7 Mt (2010: 28.0 Mt) and the 4E ounce content decreased by 4.1% to 4.2 Moz (2010: 4.4 Moz). This was mainly owing to production depletion of -1.2 Mt -0.2 Moz and owing to additional conversion from Mineral Resources to Ore Reserves. Kroondal Platinum Mine Amplats’ attributable interest is 50%. The figures quoted are as at end of June 2011 and reflect the attributable interest only. UG2 Reef figures are as per the Kroondal PSA, managed by Aquarius Platinum South Africa. The Ore Reserve tonnage decreased by 12% to 23.7 Mt (2010: 27.1 Mt) and the 4E ounce content decreased by 6.1% to 2.4 Moz (2010: 2.5 Moz) mainly owing to production depletion and owing to reallocation of previously reported Ore Reserves back to Mineral Resources. Marikana Platinum Mine Amplats’ attributable interest is 50%. The figures quoted are as at end of June 2011 and reflect the attributable interest only. UG2 Reef figures are as per the Marikana PSA, managed by Aquarius Platinum South Africa. The Ore Reserve tonnage decreased by 9.5% to 13.1 Mt (2010: 14.5 Mt) and the 4E ounce content decreased by 7.8% to 1.4 Moz (2010: 1.6 Moz) mainly owing to production depletion and owing to reallocation of previously reported Ore Reserves back to Mineral Resources. Mototolo Platinum Mine Amplats’ attributable interest is 50%. The figures quoted are as at end of December 2011 and reflect the attributable interest only. UG2 Reef figures are provided by Xstrata Alloys. It must be noted that the reporting cycle changed from end of June 2010 to end of December for 2011. Bafokeng-Rasimone Platinum Mine UG2 Reef The Ore Reserve tonnage decreased by 17% to 6.5 Mt (2010: 7.9 Mt) and the 4E ounce content decreased by 24% to 0.7 Moz (2010: 1.0 Moz) mainly owing to production depletion. Amplats’ attributable interest is 33%. The figures quoted are as at end of December 2011 and reflect the attributable interest only. Reserve figures are as per BRPM, managed by Royal Bafokeng Platinum. Merensky Reef The Ore Reserve tonnage decreased by 7.0% to 24.0 Mt (2010: 25.8 Mt) and the 4E ounce content decreased by 6.6% to 3.3 Moz (2010: 3.5 Moz) mainly owing to conversion reallocation of previously reported Ore Reserves back to Mineral Resources and owing to production depletion. As in previous years no Ore Reserves were converted for portions of Frischgewaagd 96 JQ. Securing our future Bokoni Platinum Mine Pandora UG2 Reef The Ore Reserve tonnage decreased by 5.1% to 18.2 Mt (2010: 19.2 Mt) and the 4E ounce content decreased by 6.3% to 2.3 Moz (2010: 2.4 Moz) mainly owing to conversion reallocation of previously reported Ore Reserves back to Mineral Resources. Amplats’ attributable interest is 49%. The figures quoted are as at end of December 2011 and reflect the attributable interest only. Figures provided by Anooraq Resources. Merensky Reef The Ore Reserve tonnage decreased by 6.3% to 14.3 Mt (2010: 15.3 Mt) and the 4E ounce content decreased by 10% to 1.8 Moz (2010: 2.0 Moz) mainly owing to conversion reallocation of previously reported Ore Reserves back to Mineral Resources and owing to production depletion. UG2 Reef The Ore Reserve tonnage decreased by 2.8% to 18.5 Mt (2010: 19.1 Mt) and the 4E ounce content decreased by 0.6% mainly owing to conversion reallocation of previously reported Ore Reserves back to Mineral Resources and owing to production depletion. Amplats’ attributable interest is 42.5%. The figures quoted are as at end of September 2011 and reflect the attributable interest only. UG2 Reef figures provided by Lonmin plc. UG2 Reef The Ore Reserve tonnage decreased by 1.9% to 6.2 Mt (-0.1 Mt) and the 4E ounce content decreased by 1.9% mainly owing to production depletion. ANGLO AMERICAN PLATINUM LIMITED 2011 27
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