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

Two Rivers Platinum Mineral Resourcesand Mineral Reserves continuedTwo RiversMineral Reserves as at 30 June 2010 as at 30 June 2009OrebodyCategoryMilltonnes(Mt)Grade(g/t)3PGE+AuGrade(g/t)5PGE+AuPt(Moz)Milltonnes(Mt)Grade(g/t)3PGE+AuGrade(g/t)5PGE+AuPt(Moz)UG2 Proved 5.1 3.29 3.94 0.3 7.8 3.45 4.11 0.5Proved(stockpile) 0.2 3.43 4.10 0.0Probable 30.8 2.88 3.47 1.6 27.2 3.16 3.81 1.5Total 35.9 2.94 3.54 1.9 35.2 3.23 3.88 2.0Notes• The figures in the statement above reflect the totalestimates for Two Rivers, as at 30 June 2010. Thecorresponding estimated attributable Mineral Resourcesand Reserves to Implats are summarised elsewhere inthe report• Mineral Resources are quoted inclusive of MineralReserves• Grade estimates were obtained by means ofordinary kriging of UG2 and Merensky Reef boreholeintersections• The modifying factors used in the UG2 Mineral Reservecalculations are based on mechanised bord-and-pillarmining operations• Merensky Reef estimates are unchanged from theprevious statements• The updated UG2 Mineral Resource estimate iseffectively unchanged if depletion is taken into account• The Measured UG2 Mineral Resource decreased bysome 36% largely due to the downgrading of areas withMultiple Split Reef; notably the southern area previouslyclassified as Inferred Mineral Resources progressed tothe Indicated class• Changes in the Mineral Reserve estimate involved anincrease in anticipated dilution associated with the splitreef• The individual metal proportions for the Merensky Reefwere derived by Implats• Mineral Resource and Mineral Reserve grades arereflected in both 3PGE+Au and 5PGE+Au formats• During the past year the Mineral Resources andReserves were audited by an independent third party• Rounding of numbers may result in minor computationaldiscrepancies• More details regarding the Mineral Resources andMineral Reserves can be found in the 2010 ARM annualreportwww.implats.co.za 36 Implats Mineral Resource and Mineral Reserve Statement 2010