Feasibility Study and Technical Report - Pretivm

• search ellipse: 300 m by 300 m by 300 m (90 m by 900 m by 900 m for pass2).Outside of these areas, the average density of 2.54 t/m 3 was applied. There is littlevariation in density between the different rock types.A density of 0.9167 t/m 3 was assigned to the ice existing in the glacial cap.14.12 PRIOR MININGA 3D wireframe model of the underground development and stopes for West Zone wasrepresented by wireframes, and coded in the block model to ensure that the reportedmineral resource estimates were depleted for prior mining.No mining has occurred at VOK.14.13 MODEL VALIDATIONGrade estimates and models were validated by undertaking global grade comparisonswith the input drillhole composites, visual validation of block model cross sections, andby grade trend plots.14.13.1 GLOBAL COMPARISONSThe final grade estimates were validated statistically against the input drillholecomposites. Table 14.8 and Table 14.9 provide a comparison of the estimated gradescompared to the input grades (declustered where required) for the global estimateswithin the mineralized domains. This statistical comparison shows that the domainsvalidate reasonably well globally. Note that in VOK the comparison is only for theIndicated resources to remove areas of extrapolation at depth.Table 14.8Comparison of the Mean Composite Grade with the Mean Block Model Gradefor the Mineralized Domains in the West ZoneMineralized DomainGold(g/t)Silver(g/t)Number of Samples 33,089 33,089Composite Mean 1.40 30.66Estimated Mean 1.32 28.54Pretium Resources Inc. 14-17 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC