Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
14-10
accuracy for a 1000 gram sample is about 2%, while the measuring accuracy for a
100 gram sample is only 18%.
14.6.2
Core Recovery
Core recovery is highly variable, primarily because the low strength of the FMR
mineralization allows it to be easily broken and washed from the core sample. In
general, core recovery is lower in oxidized, high FMR zones and is higher in the wall
rocks and carbonatite zones. Overall, average core recovery is 85.8%, but oxide
mineralization has lower average recovery than OxCa mineralization, which in turn
has lower recovery than transition and sulfide mineralization, as shown in Table 14.7.
In addition, there is an inverse relationship between core recovery and FMR content,
and samples with FMR content below 30% have higher recoveries than samples
above 30% FMR. (Note: for purposes of this report, %FMR in transitional and sulfide
mineralization is used to refer to percent carbonatite.)
Table 14.7 - Core Recovery by Oxide Type and FMR Content
Oxide
%FMR Footage
Meters
Average
Recovery
Oxide
<30
99,885
30445
85.5
Oxide
>30
13,915
4241
77.5
Oxide
0-100
113,800
34686
84.5
OxCa
<30
35,687
10877
89.8
OxCa
>30
9,184
2799
83.6
OxCa
0-100
44,871
13677
88.5
Trans
<30
4,461
1360
93.9
Trans
>30
640
195
94.1
Trans
0-100
5,102
1555
93.9
Sulfide
<30
11,425
3482
96.3
Sulfide
>30
1,734
529
95.9
Sulfide
0-100
13,158
4011
96.2
Total
<30
151,458
46164
87.5
Total
>30
25,472
7764
81.4
Total
0-100
176,930
53928
86.6
(A.Noble, 2014)
Core recovery for the different oxide types is generally above 80% Figure 14.3.
Transition and sulfide samples have the highest recoveries, and more than 60% of
non-oxidized samples have greater than 95% core recovery. The distribution of core
