$2.3 billion After-Tax NPV at Base Case metal prices After-Tax IRR 19.5% at Base Case metal prices Cashflow over the first four years of $965 million per year at Base Case metal prices Base case development contemplates 25-year mine life Extended Two-Phase development contemplates a 47-year mine life Base Case metal prices: Cu: US$3.35/lb, Au: US$1,600/oz, Ag: US$24/oz, Mo: US$12/lb
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