Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
14-11
recovery for oxide and OxCa samples is similar, but oxide samples are more heavily
weighted towards recovery below 80%.
(A.Noble, 2014)
14.6.3
TREO Grade vs %FMR
Given that REO mineralization is primarily related to FMR/carbonatite veins and
stockwork, there is a strong relationship between %FMR from core logging and TREO
grade. In addition, oxidation of the original carbonatite to form FMR introduces strong
enrichment effects. These relationships are shown graphically in
Figure 14.4
. This
figure, which was prepared using only samples with greater than 95% recovery,
shows that TREO grades are similar for all oxidation types below 30% FMR, but that
the oxidation type is very significant above 30% FMR.
The regression curves are roughly linear below 30% FMR, and a background TREO
grade of 0.25% TREO to 0.5% TREO is indicated by the Y-intercepts of those curves.
The geological basis for the apparent background TREO grade should be further
evaluated to determine whether it represents a different type of mineralization from
FMR that would not be recoverable in the metallurgical process, or whether it is
simply the result of measurement errors in percent FMR and TREO grade.
Figure 14.3 - Core Recovery Distribution by Oxidation Type
