mineral resource and mineral reserve statement ... - Impala Platinum

Zimplats Mineral Resourcesand Ore Reserves continuedZimplatsOre Reserves as at 30 June 2010 as at 30 June 2009OrebodyCategoryTonnes(Mt)Grade(g/t)3PGE+AuGrade(g/t)5PGE+AuNi%Cu%Pt(Moz)Tonnes(Mt)Grade(g/t)3PGE+AuGrade(g/t)5PGE+AuNi%Cu%Pt(Moz)MSZ Proved 52.0 3.41 3.60 0.10 0.07 2.8 54.3 3.40 3.59 0.10 0.07 2.9Probable 161.6 3.44 3.63 0.11 0.08 9.0 163.1 3.43 3.62 0.11 0.08 9.0Total 213.6 3.43 3.62 0.11 0.08 11.8 217.4 3.43 3.62 0.10 0.07 11.9Notes• The figures in the statement above reflect the totalMineral Resource and Ore Reserve estimate for Zimplatsas at 30 June 2010, corresponding estimated MineralResources and Ore Reserves attributable to Implats aresummarised elsewhere in this report• Mineral Resources are quoted inclusive of Ore Reserves• Mineral Resource estimates allow for estimatedgeological losses, while no allowance is made foranticipated support pillar losses during eventual mining• The Ore Reserves quoted reflect anticipated gradesdelivered to the mill• Day-to-day operations are monitored using in-houselead collection fire assays with AA finish. The MineralResources and Ore Reserves in this statement arebased largely on Genalysis nickel sulphide collection fireassays with ICP-MS finish. The differences between themethods are incorporated within the modifying factorsthat have been applied, which means that there may beslight distortions in recovery and other parameters• Nickel grades are stated as nickel in sulphide that isamenable to recovery by flotation• Mineral Resources have been estimated using krigingtechniques on data derived from surface drill holes.Estimates are based on composite widths that varydepending on cut-off grades, which are based onappropriate economic parameters• The proposal to develop portal 3 has been presented toand approved by the board• The main difference from the 2009 statement can beascribed to depletion and transfer of 6.5Mt from portals3 to 10 to the steeps, ie areas where the dip is too steepfor mechanised bord-and-pillar mining• The boundaries of the ore envelope are gradational,particularly in the footwall, so the choice of mining cut isaffected by economic factors• Rounding of numbers may result in minor computationaldiscrepancies• More details regarding the Mineral Resources andMineral Reserves can be obtained in the 2010 Zimplatsannual reportAttributable platinum ounces, net of depletion, corporate activity and additional work30 June 200730 June 200830 June 200930 June 2010Resources 77.1Moz Pt No change, depletion off-set by re-estimateReserves 11.2Moz Pt 4% increase, depletion and re-estimateResources 95.2Moz Pt 23% increase, reporting method adjustedReserves 10.9Moz Pt 3% decrease, depletionResources 92.9Moz Pt 3% decrease, depletionReserves 10.4Moz Pt 5% decrease, open-pit reserves moved to resourcesResources 92.8Moz Pt No material changeReserves 10.2Moz Pt 1.5% decrease, depletionNote: Mineral Resources are inclusive of Mineral Reserves.www.implats.co.za 42 Implats Mineral Resource and Mineral Reserve Statement 2010