Technical Report for the Maricunga Gold Mine - Kinross Gold

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Kinross Gold CorporationMaricunga Mine Technical ReportThe new interpretation incorporates outlines digitized first from sections and then transposedon plans in order to get the best possible representation of the mineralization in threedimensions.The outlines were than linked to form solids that were validated in Vulcan. Blasthole plans were also used to guide the interpretation as they provide close-spacedinformation.17.2.2 PanchoThe model for Pancho is based on the core samples collected in 2006. Diamond drillingdemonstrated that the mineralization crosses over all lithologies and appears centred on aPost-Mineral Intrusive that is in rare instances mineralised. A model similar to Verde wascreated where three domains were defined. First, 9 sections oriented N40°W were plottedand interpreted with the outlines digitized in Vulcan. Then, 47 plans at 10 m intervalsencompassing elevations from 4440 m to 3700 m elevation were interpreted. The outlinesobtained in plan and section views were connected to form the solids defining the gradedomains. They are also referred to as Domain 1, Domain 2 and Domain 3 corresponding tograde ranges similar to those used at Verde.• Domain 1 = gold grade greater than 0.6 g/t• Domain 2 = gold grade between 0.3 g/t and 0.6 g/t• Domain 3 = low grade at the periphery based on 0.15 g/tThe northwest quadrant of the Pancho deposit shows significant copper content related tothe presence of a small chalcocite blanket close to the surface and hypogene porphyrycopper mineralization in the form of chalcopyrite at greater depths. A copper domain wasinterpreted on sections and plans as per the methodology used in defining the gold gradedomains. The copper domain of interest is generally located between 4320m and 3840melevation. The copper grades shown on plans and sections demonstrate that a 200 ppmcyanide soluble copper grade form a continuous domain in three-dimensions. It wastherefore the criteria chosen for defining two domains and coding the block accordingly:• Domain 0 = outside the copper envelope defined by 200 ppm cyanide soluble copper• Domain 1 = inside the copper envelope80
Kinross Gold CorporationMaricunga Mine Technical Report17.3 Oxidation Model and RecoveryMetallurgical recovery is a key aspect in modelling the Verde and Pancho deposits.Significant effort was directed towards establishing a relationship between metallurgicalrecovery and the level of oxidation visually estimated by the site geologists. Table 17-1shows the criteria used in defining the material types encountered in the pit.Table 17-1: Oxidation CodesMaterial Condition CodeOxide greater than 50% Block Code Redox = 3oxidationMixed between 10%and 50%oxidationSulphide less than10%oxidationBlock Code Redox = 2Block Code Redox = 1The original recovery model was developed by interpretation of cross section, longitudinalsection and level plan data by the site geologists. The more recent recovery model for Verdeintegrates all blast hole and mine geology information collected to date. The interpretedsurfaces were used as hard boundaries for assigning recoveries in the blocks during pitoptimization. The surfaces are highly irregular and similar to the undulations observed in thepit walls at Verde.The additional core samples available for Pancho allowed for an update of the surfacesmarking the different levels of oxidation, namely oxide, mixed and sulphide. One noticeabledifference is that the new interpretation includes less mixed material than indicated by theoriginal interpretation completed in 2003.17.4 Grade Model17.4.1 Statistical and Geostatistical AnalysesExcluded DataThe following data was not used in completing the original resource block model for Verde:81
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Technical Report for the Maricunga Gold Mine - Kinross Gold

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