Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
14-23
Table 14.13 - Formulae for Estimation of Missing Fe
2
O
3
, MnO, and CaO Grades
Deposit Oxidation
Formula
Whitetail
Oxide
Fe2O3pct = 9.226*SumREOx^0.2200
MnO_pct = 1.386*SumREOx^0.4844
CaO_pct = 0.487-0.013*SumREOx
OxCa
Fe2O3pct = 8.510*SumREOx^0.1535
MnO_pct = 0.914*SumREOx^0.397
CaO_pct = 3.306+4.854*SumREOx
Tran,Sulf
Fe2O3pct = 8.510*SumREOx^0.1535
MnO_pct = 0.914*SumREOx^0.397
CaO_pct = 3.306+4.854*SumREOx
Bull Hill
Oxide
Fe2O3pct = 9.884*SumREOx^0.3199
MnO_pct = 1.697*SumREOx^0.6985
CaO_pct = 0.498 + 0.031*SumREOx
OxCa
Fe2O3pct = 8.335*SumREOx^0.3279
MnO_pct = 1.282*SumREOx^0.7024
CaO_pct = 0.820+4.712*SumREOx
Tran,Sulf
Fe2O3pct = 7.879*SumREOx^0.1540
MnO_pct = 1.229*SumREOx^0.5982
CaO_pct = 2.181 + 6.844*SumREOx
(A.Noble, 2014)
14.10 Variograms
Sage variography software was used to compute variograms for evaluation of the
spatial continuity of composited TREO grade, %FMR, %Fe
2
O
3
, %MnO, %CaO, and
the OreZONE flag.
Variograms were computed using the trend-flattened coordinate space, thus the XY
plane in variogram space is equivalent to a flattened longitudinal section that is
subparallel to the ore zoning, and the Z-variogram axis is perpendicular to the ore
zoning. In addition, the data from the individual zones were rotated before
computation based on the generalized rotation of best continuity for each zone, as
summarized in Table 14.14.
Using the trend-flattened coordinate space improves evaluation of continuity by
allowing the variograms to follow the irregular shape of the vein trends. The ability to
follow the zoning is particularly important for these deposits, since the anisotropy
perpendicular to the trend can be more than 20:1, and a slight misalignment
perpendicular to the trend introduces a large variability to the variogram. Z-axis
