Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
13-13
Table 13.7 - Cumulative Percent REO Contained Below Size Fraction, Bull Hill
Test No.
Cumulative
Products
Mass %
Ce203
%
La203
%
Nd203
%
Pr203
%
Sm203
%
Y203
%
REO %
RES11-49
+1/4"
64.0
3.2
3.3
4.7
10.1
21.4
11.7
5.1
-1/4"
36.0
95.8
96.7
95.3
89.9
78.6
88.3
94.9
-48 mesh
24.5
85.4
86.7
85.8
81.4
71
76.0
84.5
-100 mesh
22.9
80.0
81.6
81.3
77.1
67.3
71.4
79.6
-200 mesh
20.4
69.5
70.7
70.7
66.9
58.5
62.1
69.1
-325 mesh
18.9
63.3
63.6
63.8
60.3
52.9
55.8
62.6
-500 mesh
17.7
58.5
58.1
58.5
55.1
48.4
50.8
57.5
HEAD (Calc.)
100.0
100.0
100.0
100.0
100.0
100.0
100.0 100.0
RES11-52
+1/4"
22.7
29.3
29.9
29.2
30.5
25.9
28.6
29.4
-1/4"
77.3
70.7
70.1
70.8
59.5
74.1
71.4
70.5
-48 mesh
55.5
45.3
49.4
50.5
49.8
58.0
43.7
48.4
-100 mesh
51.0
41.3
44.9
46.1
45.3
53.3
41.4
43.7
-200 mesh
44.7
34.2
38.2
39.3
38.4
45.2
33.4
36.7
-325 mesh
39.6
29.2
33.3
34.2
33.3
39.3
28.2
31.7
-500 mesh
32.1
23.8
27.7
28.2
27.0
30.6
24.4
26.0
HEAD (Calc.)
100.0
100.0
100.0
100.0
100.0
100.0
100.0 100.0
RES11-53
+1/4"
87.4
71.2
70.5
74.6
67.1
82.2
81.6
72.2
-1/4"
12.5
28.8
29.5
25.4
32.9
17.8
18.4
27.8
-48 mesh
4.7
24.9
24.6
20.5
28.0
10.5
14.9
23.8
-100 mesh
4.1
24.1
23.7
19.7
27.1
9.8
14.0
22.4
-200 mesh
3.2
22.0
21.0
17.5
23.9
8.7
12.5
20.2
-325 mesh
2.6
19.6
18.2
15.2
20.7
7.6
10.7
17.7
-500 mesh
2.0
17.0
15.0
12.6
17.4
6.4
9.0
15.0
HEAD (Calc.)
100.0
100.0
100.0
100.0
100.0
100.0
100.0 100.0
Drill core samples RES 11-49 show that 84.5% of REO will report to 24.5% of mass in -48 mesh
fraction. But these results were not duplicated for RES 11-52 and RES 11-53. There are many
reasons for that, however, process-wise the deposit requires other simple techniques to upgrade
rare earths.
(SGS Lakefield, 2012)
For Whitetail, REOs are upgraded to the fines but exhibited poor recovery. Most of
the mass and REOs remain in the coarse fractions (+ ¼ inch) as shown in the Table
13.8.
