Anglo American Annual Report 2012

ORE RESERVES AND MINERAL RESOURCESNICKEL(See page 213 for details)Attributable%MiningMethodContainedNickel Tonnes GradeBarro Alto Direct Feed 100 OP 193 kt 14.0 Mt 1.38 %NiStockpile 85 kt 7.1 Mt 1.19 %NiNiquelândia 100 OP 70 kt 5.7 Mt 1.24 %NiPLATINUM (6)(See page 215 for details)Attributable%MiningMethodContainedPGE Tonnes Grade (4E)Main Sulphide Zone 79.9 UG 15.4 Moz (4E) 113.6 Mt 4.21 g/tMerensky Reef UG 85.7 Moz (4E) 479.9 Mt 5.55 g/tPlatreef OP 62.8 Moz (4E) 891.8 Mt 2.19 g/tUG2 Reef UG 186.8 Moz (4E) 1,131.6 Mt 5.13 g/tDIAMONDS (7)(See pages 217–221 for details)Attributable%MiningMethod Carats Tonnes/Area GradeDBCi – Snap Lake 85.0 UG 4.7 M¢ 2.5 Mt 189.27 cphtDBCi – Victor 85.0 OP 2.5 M¢ 12.9 Mt 19.34 cphtDBCM – Namaqualand 62.9 OC 2.1 M¢ 19.3 Mt 10.87 cphtDBCM – Venetia (OP) 62.9 OP 35.4 M¢ 34.2 Mt 103.46 cphtDBCM – Venetia (UG) 62.9 UG 95.5 M¢ 109.9 Mt 86.93 cphtDebswana – Damtshaa 42.5 OP 6.3 M¢ 29.3 Mt 21.46 cphtDebswana – Jwaneng 42.5 OP 84.3 M¢ 70.1 Mt 120.35 cphtDebswana – Letlhakane 42.5 OP 7.8 M¢ 27.4 Mt 28.62 cphtDebswana – Orapa 42.5 OP 119.1 M¢ 167.3 Mt 71.20 cphtNamdeb – Douglas Bay 42.5 OC 111 k¢ 1,502 kt 7.39 cphtNamdeb – Elizabeth Bay 42.5 OC 548 k¢ 4,718 kt 11.62 cphtNamdeb – Mining Area 1 42.5 OC 178 k¢ 17,597 kt 1.01 cphtNamdeb – Orange River 42.5 OC 544 k¢ 109,725 kt 0.50 cphtNamdeb – Atlantic 1 42.5 MM 10,773 k¢ 114,190 k m 2 0.09 cpm 2Namdeb – Midwater 42.5 MM 330 k¢ 1,339 k m 2 0.25 cpm 2PHOSPHATE PRODUCTS(See page 222 for details)Attributable%MiningMethod Tonnes GradeOuvidor 100 OP 64.1 Mt 11.9 %P 2 O 5NIOBIUM(See page 223 for details)Attributable%MiningMethodContainedProduct Tonnes GradeBoa Vista Oxide 100 OP 42 kt 3.4 Mt 1.22 %Nb 2 O 5Mining method: OP = Open Pit, UG = Underground, OC = Open Cut, MM = Marine Mining.(1)Estimated Measured plus Indicated Resources are the sum of the Measured and Indicated Mineral Resources (on an exclusive basis, i.e. Mineral Resources are reported as additional toOre Reserves). Please refer to the detailed Business Units/Commodities Mineral Resource estimates tables for the individual Measured, Indicated and Inferred estimates. The Mineral Resourceestimates were compiled in accordance with the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (The JORC Code, 2004) as a minimum standard.The Mineral Resource estimates for operations in South Africa were compiled in accordance with The South African Code for the Reporting of Exploration Results, Mineral Resources and MineralReserves, (The SAMREC Code, 2007 Edition as amended July 2009).The figures reported represent 100% of the Mineral Resources, the percentage attributable to Anglo American plc is stated separately. Rounding of figures may cause computational discrepancies.(2)Tonnes are reported on a wet basis. Assays are on a dry basis.(3)GEMCO Manganese grades are given as per washed ore samples and should be read together with their respective yields.(4)Mamatwan tonnages stated as wet metric tonnes.(5)Coal Resources are quoted on a Mineable Tonnes In-Situ (MTIS) basis in million tonnes which are in addition to those resources which have been modified to produce the reported Coal Reserves. CoalResources are on an in-situ moisture basis. The coal quality for the Coal Resources is quoted on an in-situ heat content as Calorific Value (CV) using kilo-calories per kilogram (kcal/kg) units ona Gross As Received (GAR) basis. CV is rounded to the nearest 10 kcal/kg.(6)Details of the individual operations appear in the Anglo American Platinum Annual Report. Merensky Reef and UG2 Reef Mineral Resources are estimated over a practical minimum mining widthsuitable for the deposit known as the ‘Resource Cut’. The minimum mining width over which Mineral Resources are declared is 110cm. The ‘Resource Cut’ width takes cognisance of the mining methodand geotechnical aspects in the hanging wall or footwall of the reef. The figures reported represent 100% of the Ore Reserves attributable to Anglo American Platinum unless otherwise noted.4E is the sum of Platinum, Palladium, Rhodium and Gold in grammes per tonne (g/t).(7)DBCi = De Beers Canada, DBCM = De Beers Consolidates Mines, Debswana = Debswana Diamond Company, Namdeb = Namdeb Holdingsk¢ = thousand carats. M¢ = million carats. k m² = thousand square metres. Grade is quoted as carats per hundred metric tonnes (cpht) or as carats per square meter (cpm²).Reported Diamond Resources are based on a Bottom Cut Off (BCO) which refers to the bottom screen size aperture and varies between 1.00mm and 3.00mm (nominal square mesh).Diamond Resources are quoted as inclusive of those used to calculate Diamond Reserves and must not be added to the Diamond Reserves.Ore Reserves and Mineral ResourcesAnglo American plc Annual Report 2012 195