Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
14-13
14.6.4
TREO Grade vs Core Recovery
Core recovery is a significant issue for resource estimation, since low recovery
implies preferential loss of the softer, more friable rare earth mineralization, especially
in the oxide zone. This issue was examined by comparing the average TREO grades
of samples with similar FMR content, but different core recoveries, as shown in
Figures 14.5 to 14.8.
Figure 14.5 - TREO Grade for Oxide Samples
Grouped by Core Recovery
Figure 14.6 - TREO Grade for OxCa Samples
Grouped by Core Recovery
Figure 14.7 - Treo Grade for Low-Grade
Oxide Samples Grouped by Core Recovery
Figure 14.8 - TREO Grade for Tran+Sulf
Samples Grouped by Core Recovery
(A.Noble, 2014)
Rather than a simple relationship where low core recovery equals low TREO, these
figures indicate complex behavior, depending on oxidation type and grade. The
