Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
13-49
In a downstream vessel, additional ammonium hydroxide is added to precipitate the
balance of the thorium in a mixed thorium/REE hydroxide precipitate. This precipitate
is recycled to the nitric acid leach. The filtrate from this process is transferred to a
downstream vessel where additional ammonium hydroxide is added to precipitate the
balance of the rare earths as a hydroxide that is essentially free of thorium. This
precipitate is filtered, dried and calcined. An analysis of the final product is shown in
Table 13.29.
Table 13.29 - Analysis of REE product
(SGS Lakefield, 2014)
The potential for significant additional reduction in thorium concentration to below a
thousandth of a percent is thought to be possible but was not proven in the laboratory
at the time of this writing. Therefore, an ultra-low thorium product has not been
included in this study.
SAMPLE Tare Gross Net
TREO La2O3 Ce2O3 Pr2O3 Nd2O3 Sm2O3 Eu2O3 Gd2O3 Tb2O3
ID
g
g
g
% % % % % % % % %
C1
13.20
464.90
451.70
88.10
20.90
43.60
4.66
15.40
1.99
0.45
1.04
0.10
C2
13.40
340.90
327.50
86.00
11.80
46.70
5.28
17.60
2.42
0.57
1.42
0.15
C3
6.30
63.80
57.50
86.50
5.90
38.50
6.09
25.00
5.86
1.54
3.28
0.41
C4
6.40
382.80
376.40
86.80
18.80
45.10
4.61
14.90
1.88
0.43
1.04
0.10
C5
20.70
302.70
282.00
86.80
20.10
44.60
4.58
14.30
1.74
0.40
0.99
0.10
C6
6.40
128.50
122.10
84.80
7.40
45.30
5.82
20.30
3.15
0.74
1.86
0.21
C7
6.40
83.90
77.50
87.70
21.20
44.00
4.52
14.50
1.86
0.42
1.04
0.11
Average
10.40
252.50
242.10
86.67
15.16
43.97
5.08
17.43
2.70
0.65
1.52
0.17
SAMPLE Dy2O3 Ho2O3 Er2O3 Tm2O3 Yb2O3 Lu2O3 Y2O3 Sc2O3 Th
U C(t)
SiO2
ID
% % % % % % % % % g/t
% %
C1
0.37
0.04
0.07
0.01
0.02
-
0.98
<0.01
0.15
0.00
0.73
0.26
C2
0.59
0.08
0.13
0.01
0.05
0.01
1.87
<0.01
0.10
0.00
0.66
0.77
C3
1.66
0.19
0.31
0.03
0.11
0.01
3.05
<0.01
0.03
0.00
0.66
0.62
C4
0.40
0.05
0.08
0.01
0.03
-
1.08
<0.01
0.24
0.00
0.54
0.45
C5
0.37
0.05
0.07
0.01
0.03
-
1.07
<0.01
0.17
0.00
0.58
0.37
C6
0.86
0.11
0.20
0.02
0.08
0.01
3.04
<0.01
0.02
0.00
0.77
1.42
C7
0.40
0.05
0.08
0.01
0.03
0.01
1.19
<0.01
0.02
0.00
0.64
0.65
Average
0.66
0.08
0.13
0.01
0.05
0.01
1.75
< 0.01
0.10
0.00
0.65
0.65
SAMPLE Al2O3 Fe2O3 MgO CaO Na2O K2O TiO2 P2O5 MnO Cr2O3 V2O5 LOI
ID
% % % % % % % % % % % %
C1
0.02
0.02
< 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01
0.11
< 0.01
0.01
3.09
C2
0.06
0.03
< 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01
0.11
< 0.01
0.02
3.37
C3
0.01
< 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01
0.01
0.06
< 0.01
0.02
2.96
C4
0.04
0.03
< 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01
0.12
< 0.01
0.01
2.64
C5
0.05
0.07
< 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01
0.12
< 0.01 < 0.01
2.66
C6
0.08
< 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01
0.10
< 0.01
0.01
3.93
C7
< 0.01
0.04
< 0.01 < 0.01 < 0.01 < 0.01 < 0.01 < 0.01
0.11
< 0.01 < 0.01
3.05
Average
0.04
0.04
< 0.01 < 0.01 < 0.01 < 0.01 < 0.01
0.01
0.10
< 0.01
0.01
3.10
