Technical Report for the Fort Knox Mine - Kinross Gold

Fort Knox Mine Technical Reporttab in the MineSight drill hole view properties. The solids were loaded to the “DOMI”item in the composite file and coded as 10, 20, and 30.In the schist, gold mineralization appears to consist of narrow extensions of mineralizedstructures that transect the granite. In order to constrain grade interpolation betweengranite and schist, a solid was constructed from pre-existing sectional interpretations ofthe schist lithology. The subsequent schist solid was loaded to the knx009.07dcomposite and coded as 4 in the “DOMI” item.17.2.7 DomainsThe west, middle, east, and schist domains described in the Lithology section abovewere developed to reflect orientations of gold-bearing veins observed in exploration andblast-hole data across the deposit. These domain solids were loaded to the compositefile as described above, then assigned to the “DOMI” item in the knx015.07d blockmodel as a block limiting item in the interpolation. The block search parameters,ellipsoidal search distances and orientations are adjusted for each of the four domains.The domain boundaries were “soft” between the various granite domains, meaning thatcomposites from one domain were allowed to interpolate blocks in other granitedomains. However, the domain boundaries between the schist and the various granitedomains were “hard” boundaries, so composites coded as schist were not used ininterpolating blocks coded as granite, and vice-versa.17.2.8 VariographyVariograms were developed, using the variography program (SAGE2001), for the west,middle and east domains to develop kriging and search parameters. The variographyconsists of directional correlograms created using nested spherical models for each ofthe domains, calculated from blast hole data. The variogram parameters, applied to thekrige models, were derived from structural orientations and helped determine theellipsoidal search parameters used in the final ID 2 model that define the current mineralreserve and resource estimates contained in this report. Tables 17-3 presents thevariogram parameters.58