Technical Report for the Maricunga Gold Mine - Kinross Gold

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Kinross Gold CorporationMaricunga Mine Technical ReportFigure 16-2: Metallurgical Sample Locations – Pancho Pit – 4300 Level16.1.4 Bond Work IndexBond Work Index (BWI) samples were collected from the 10, HQ diameter core holes drilledat Verde. Bond work index tests required selection of whole HQ core pieces of approximatelength of 0.15 – 0.20 meters. For Verde, such pieces were selected every 4 meters downhole.All ten Verde HQ diameter holes were sampled in this manner, a total of 296 samples.At Pancho, BWI samples were collected from the standard diameter drill holes. Whole corepieces were taken approximately every 20 meters down hole. A total of 67 samples wereselected. All samples were shipped to Hazen Research, Colorado, for analysis.Results of the BWI tests indicated limited variability in the rock mass therefore; the BWI datawas not modeled when completing the Verde and Pancho resource models.64
Kinross Gold CorporationMaricunga Mine Technical Report16.1.5 Specific GravityAs part of the BWI tests above, Hazen completed specific gravity analyses on all the BWIsamples submitted. In addition to this data, 1171 samples of half core were selected fromthe half core library. Samples, roughly 15 cm in length, were selected approximately every30 meters downhole throughout the entire campaign. The samples were shipped to ACMElaboratories, Santiago where they were analysed using the wax dipped immersion method.A summary of the specific gravity results is presented in Table 16-5.Table 16-5: Specific Gravity ResultsDeposit Unit SGVerde Oxide 2.45Mixed 2.52Sulphide 2.57Laguna Tuff 2.00Post Mineral Intrusive 2.60Waste Dump Material 2.00Pancho Oxide 2.27Mixed 2.38Sulphide 2.49Both Pancho and Verde exhibit trends of increasing Specific Gravity with depth, leading tothe decision to model the deposit Specific Gravity by the oxidation surface rather than byrock type.16.1.6 Acid Rock Drainage StudyAt the request of the CMM environmental department (Jorge Herrera), ALS Chemex LaSerena sent 71 pulp samples to ALS environmental laboratories Santiago for acid basedaccounting testwork. A subset of 40 of these was proposed for testwork. The forty samplesselected were from widely spaced locations in the anticipated pit designs for both Verdesand Pancho. Samples included both ore and waste in major rock types in all redox zones.In 2007, follow up work included a sample collection program comprising 150 samples. Todate partial results are available for 140 samples. Representative samples will be selectedfor further wet cell analysis work once the dataset is complete.65
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Technical Report for the Maricunga Gold Mine - Kinross Gold

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