Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
7-13
Table 7.2 - Zonal REE Mineralogy in the Bull Hill and Whitetail Carbonatite
and Derivative Dikes and Veins from the Surface to Depth
Zone
Mineralized Body
REE Mineralogy
Oxide
FMR dikes and veins; oxidized
and leached carbonatite
(surface to appx. 5,600 feet/
1,707 meters) elevation ±300-
500 feet (91-152 meters)
thickness)
FeOx-MnOx-REE ± Ksp, ap, Q,
bi
Bastnasite group minerals
(bastnasite-dominant), monazite,
± variable, but generally
subordinate cerianite
Oxide-
Carbonate
Variably oxidized and partially
leached carbonatite
(variable thickness, surface to
appx. 5,600 feet/1,707 meters
elevation)
FeOx-MnOx-REE-calc ± Ksp, ap,
Q, bi
Bastnasite group minerals
(bastnasite-dominant), ancylite,
monazite, ± variable, but
generally subordinate cerianite
Transitional
Partly oxidized carbonatite
(appx. 5,600 feet/1,707 meters
elevation): about 20 feet/6.1 m
thick
Calc-REE-sulf-FeOx-REE ± Ksp,
ap, aeg, bi
Predominantly ancylite; minor to
significant bastnasite group
minerals, ± monazite
Sulfide
Unoxidized carbonatite and
silicocarbonatite
( < 5,600 feet/1,707 meters
elevation)
Calc-REE-sulf (py-
po±cp,sl,gn,mb)-bi ± Ksp, ap,
aeg
Predominantly ancylite; minor to
significant bastnasite group
minerals; ± minor monazite,
carbocernaite, burbankite
(Noble et al, 2013)
7.5.1 Unoxidized Zone
The upper contact of the unoxidized, or sulfide-bearing, zone is generally relatively
flat-lying, and extends from depth upward to within approximately 600 feet (183
meters) of the surface, locally deeper along structural zones. The bottom of this zone
has not been reached by drilling. The unoxidized zone is characterized by rare earth
mineralization accompanied by sulfides, but with no oxidation or apparent leaching of
carbonate minerals. REE mineralization in the carbonatite consists primarily of
ancylite
(Sr (La, Ce) (CO
3
)
2
OH•H
2
O)
and subordinate bastnasite group minerals (REE
fluorocarbonates that include bastnasite, parisite, and synchysite) ± minor monazite
(Table 7.2). The presence of carbocernaite [
(Ca,Na)(Sr,Ce,Ba)(CO3)2]
and/or
