Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 – Rev. 0
11-18
Table 11.4 - 2009-2013 Drill Duplicates Results
Statistics
Original Crush
TREO %
Duplicate
Cush TREO %
Original Pulp
TREO %
Duplicate Pulp
TREO %
Count =
505
505
476
476
Min =
0.013
0.009
0.012
0.012
Max =
22.830
24.486
22.813
24.063
Mean =
1.246
1.234
1.320
1.320
Std Dev =
2.113
2.168
2.228
2.261
Precision =
9.3
6.5
% Bias =
1.0
0.0
Correlation =
1.00
1.00
% of samples within 10% of
one another =
79
97
% of samples within 20% of
within 20% of one another =
95
99
(Jaacks, 2014)
11.6.10 Duplicates Quality Control Graphs
Figure 11.2 shows the quality control plots for the crush (preparation) and pulp
(analytical) duplicates for TREO. A precision envelope of ± 20% is shown in blue
dashed lines centered about the solid red 1:1 line (indicating 100 % correlation) for
the crush duplicates. A precision envelope of ± 10% is shown in the analytical
duplicates. Ninety-five percent of the crush duplicate analyses are within ± 20
percent of one another for the TREO analyses. Ninety-seven percent of the pulp
duplicate analyses are within ± 10 percent of one another for the TREO analyses.
