Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
th
, 2014
10135-200-46 - Rev. 0
7-17
7.6 Bear Lodge District REE Zonation
The Bear Lodge REE deposits (oxidized and OxCa) in the Bull Hill area are generally
LREE-enriched, with the bulk of the REE’s contained in bastnasite group minerals
and variable, but subordinate, monazite and cerianite. Exploration drilling of the
Whitetail resource area and the Carbon and East Taylor target areas in 2010 through
2013 led to the recognition of an apparent district zonation of LREE- and HREE-
enrichment, in which the western and northern areas are enriched in HREE.
Preliminary mineralogical studies and assay data suggest that the HREE may be
hosted in HREE-enriched bastnasite group minerals at Whitetail Ridge and Carbon,
and in HREE-enriched bastnasite group minerals, along with xenotime/rhabdophane
and yttrium-vanadium phosphate at East Taylor. Monazite at Whitetail Ridge, Carbon,
and East Taylor appears to be enriched in Nd, but not generally in HREE. Table 7.3
summarizes the REE mineralogy in the Oxide and OxCa zones at the Bull Hill and
Whitetail Ridge resource areas and the Carbon and Taylor target areas.
Table 7.3 - Oxide Zone REE Mineralogy Distribution
of the Bear Lodge REE District
Area
REE Mineralogy
Bull Hill Resource Area
bastnasite group minerals; monazite;
cerianite; REE-MnOx
Whitetail Ridge Resource
Area)
bastnasite group minerals (Y, Th); cerianite;
monazite (Nd, Sr, Th); REE-MnOx
Carbon REE
bastnasite group minerals (Y, Th); apatite
East Taylor)
bastnasite group minerals (Y, Th); monazite
(Nd, Sr, Th); cerianite; REE-MnOx;
xenotime/rhabdophane; Y-V phosphate
(Modified from Noble et al, 2013)
