Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
14-12
(A.Noble, 2014)
For practical purposes, there is no difference in the low-grade %FMR-%TREO
regressions by oxidation type, although a slight enrichment of TREO grade is
possible for oxidized mineralization. The linear relationships between FMR and
TREO grade below 30% FMR are believed to represent rocks in which stockwork
mineralization is predominant and grade increases in a direct relationship to the
volume of FMR/carbonatite. In addition, enrichment effects of oxidation are minor.
Above 30% FMR, veins become increasingly more important, and the %TREO:
%FMR grade relationship in oxide and OxCa changes from a linear to an exponential
relationship. In addition, TREO grades increase significantly as degree of oxidation
increases from sulfides to oxides, owing to the enrichment of TREO grades as
carbonate and sulfide are removed through oxidation and dissolution. The
exponential relationship between %TREO and %FMR is not understood, but a
reasonable hypothesis is that the oxide-enrichment process is more effective in wider
veins.
Figure 14.4 - TREO vs FMR Relationship by Oxidation Type
