Boseto Copper Project BFS Economics Update - Discovery Metals ...

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InputIncrease Mine life to 20 yearsCapital cost changes by $30mMining cost changes by 50c/tSilver price changes by $3/ozSilver recovery changes 5%Copper recovery changes 5%Exchange rate changesDiscount rate changed to 8%Increase in strip ratio by 1Full Site Diesel Power GenerationNPV Impact$10m (at $2.00/lb copper)$4.5m assumes 50% debt funded$43.5m$5.6m$2.4m$21.4mMain impact on capital will be in BFS$29.6m$8.7m$35.3m(20c/lb copper produced)September 2009Copper price sensitivity reported separately18
Opportunities PossibleExpand Boseto concentratorthroughputIncrease open pit life at Zeta,Plutus, PetraNew Resource additions within15 kmUnderground potential at Zetaand PlutusPotential to replicate alongstrikeCommentDesigned with expansion in mindPlutus prospect still growingQuirinus, NE Zeta, Nexus targetsHigher grade zones at depth1,300 strike km of explorationtargetsSeptember 200919
Page 1 and 2: 6 October 2009ASX RELEASEBOSETO COP
Page 3 and 4: September 2009September 20091
Page 5 and 6: Since the publication of the Pre-Fe
Page 7 and 8: ‣ This is the third of four Boset
Page 9 and 10: 2 Million tonnes p.a. concentrator
Page 11 and 12: Capital has not been re-estimated b
Page 13 and 14: Cost - Basis PFS XPFSDateBFS Progre
Page 15 and 16: $1.50Industry Average Estimates$1.0
Page 17 and 18: Cost - US$/lb* 1 PFS XPFSBFS Progre
Page 19: USD millions200150100US$4.00/lbUS$3
Page 23 and 24: New power line from MaunPL 98/2005P
Page 25 and 26: Capital costs have not been updated
Page 27 and 28: GM OperationsDepartments Site Gabor
Page 29 and 30: Fleet Machine Number Annual HoursWA
Page 31 and 32: Oxide material (which is less than
Page 33 and 34: Recruitment,$0.10Support labour,$0.
Page 35 and 36: Contingency,$0.5Support labour,$0.4
Page 37 and 38: NamibiaBotswanaBoseto SiteGobabisWa
Page 39 and 40: Contingency,$0.5ConcentrateFreight,
Page 41 and 42: US$/lb3.50300 3.002.502.001.502011

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