Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
13-14
Table 13.8 - Cumulative Percent REO Contained Below Size Fraction, Whitetail
VARIABILITY SAMPLE: RES 10-21
(Whitetail deposit)
Grades%
Test No.
Cumulative
Products
Mass %
Ce203
La203
Nd203
Pr203
Sm203 Y203
REO
RES 10-21
+1/4"
88.1
0.73
0.49
0.27
0.08
0.05
0.02
1.84
-1/4"
13.9
2.18
1.45
0.71
0.22
0.10
0.07
4.72
-48 mesh
6.0
4.31
2.84
1.35
0.43
0.15
0.12
9.20
-100 mesh
5.1
4.79
3.12
1.49
0.47
0.17
0.12
10.2
-200 mesh
4.1
5.31
3.33
1.59
0.51
0.19
0.13
11.0
-325 mesh
3.5
5.62
3.40
1.63
0.52
0.19
0.13
11.5
-500 mesh
2.7
6.10
3.48
1.68
0.54
0.20
0.14
12.1
HEAD
(Calc.)
100.0
0.93
0.62
0.33
0.10
0.06
0.03
2.07
%Distribution
Test No.
Cumulative
Products
Ce203
La203
Nd203
Pr203
Sm203
Y203
REO
UF
RES 10-21
+1/4"
87.6
67.6
70.0
88.6
78.0
88.8
88%
0.08
-1/4"
32.4
32.4
30.0
31.4
22
31.2
31.7
2.3
-48 mesh
27.9
27.6
24.7
26.6
15.5
23.3
26.8
4.4
-100 mesh
26.4
25.8
23.1
24.9
14.7
21.2
25.2
4.9
-200 mesh
23.2
21.9
19.7
21.2
12.8
17.7
21.8
5.3
-325 mesh
20.9
19.0
17.2
18.5
11.1
15.5
19.3
5.6
-500 mesh
17.8
15.3
13.9
15.1
9.1
12.7
16.0
5.9
HEAD
(Calc.)
100.0
100.0
100.0
100.0
100.0
100.0
100.0
(SGS Lakefield, 2012)
13.5.2 Magnetic Tests
Whitetail solids (-0.5+0.18mm) responded well to magnetic separation and the data
are shown in Table 13.9. About 4.1% of total REO+Y
2
O
3
plus 62.2% of total silicates
reported to the non-magnetic mass fraction 30.5 wt.%., This implies that 95.9% of
REO+Y
2
O
3
was recovered to the magnetic fraction (69.5 wt.%) mass. Non-magnetics
are a sterile mass of Aluminum clays that are rejected. Magnetic separation was
applied to enhance gangue rejection and improve REO recovery.
