Technical Report for the Maricunga Gold Mine - Kinross Gold

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Kinross Gold CorporationMaricunga Mine Technical ReportTable 17-14: Optimization Parameters for VerdeMining CostsUnit Mining Costs $1.000Mining Recovery 97.50%Mining Dilution 2.50%MCAF based onelev $0.016Pit SlopesProfile 1 (EastVerde) Azimuth Slope10 44.5Below 4350 m 65 49155 52.5275 49Profile 2 (EastVerde) Azimuth SlopeFrom 4360 to 4430m 70 44.5153 49Profile 3 (EastVerde) Azimuth SlopeAbove 4440 0 380 180Profile 4 Azimuth SlopeWest Verde 0 5190 51180 49270 49Process RecoveriesOxide Au 73%Mixed Au 70%Sulphide Au 53%Processing CostsProcess costs $US/t $3.76Gold Prices $550 and $625Selling costs $US/ozScaled to gold priceA Mining Cost Adjustment Factor (MCAF) was also included to take into account theincreased haul distance as the pit will get deeper. The base mining cost used was $1.00 pertonne with an added $0.084 for longer ore haul to crusher and waste dump. Another $0.016was also added per 10 m bench from 4300 m elevation to consider extra haul above orbelow the pit access road. Sustaining capital for leach pad development was also included($0.26 per tonne).The Pancho ore will be processed at a rate of approx. 49,000 tpd over the life of mine.Average heap leach gold recoveries are based on test work results: 85% for oxide ore, 75%92
Kinross Gold CorporationMaricunga Mine Technical Reportfor mixed ore and 69% for sulphide ore. The assumptions for the copper recoveriesincorporate the dissolution rates for the different material types. They are 71%, 92% and60% respectively for oxide, mixed and sulphide material. These rates are used inconjunction with a 95% plant recovery resulting in final recoveries of 67% for oxides, 87% formixed and 57% for sulphides. Table 17-15 summarizes the optimization parameters forPancho.Table 17-15: Optimization Parameters for PanchoMining CostsUnit Mining Costs $1.000Mining Recovery 97.50%Mining Dilution 2.50%Pit SlopesProfile 1 Azimuth Slope70 44.5Below 4300 m 153 49210 44.5308 52.5Profile 2 Azimuth SlopeAbove 4300 m 90 3990 39Process RecoveriesOxide Au 85%Mixed Au 75%Sulphide Au 68%Processing CostsProcess costs $us/t Block Model PCAFGold Prices $550 and $625Selling costs$US/ozScale17.10 Pit DesignsFor the 2007 reserve estimate final pit designs were prepared for the Verde pits and Pancho.Waste dump designs and overall site layout were also updated.17.10.1 VerdeVerde pit design work was completed by CMM’s mine planning engineers using Vulcanmining software. The software allows the user to input slope design criteria that varies both93
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Technical Report for the Maricunga Gold Mine - Kinross Gold

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