NI43-101Pre-Feasibility Study Report - page 132

Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
, 2014
10135-200-46 – Rev. 0
described in this report (contained within the oxide and OxCa alteration zones
described in Chapter 7.0). Oxide zone REE mineralization is dominated by rare earth
minerals of the bastnasite group, with variable, and typically subordinate, quantities of
monazite and cerianite. Oxide-carbonate mineralization contains a variable mix of
bastnasite group minerals and ancylite, with varied and subordinate quantities of
monazite and cerianite.
Figure 8.1 - Locations of REE Resource Areas, Bear Lodge
Deposits and REE Target Areas
(Rare Element, 2013)
The highest concentration of REE-mineralized bodies occurs in a series of steeply
dipping, northwest and lesser north-trending dike swarms and stockworks along the
western contact zone between the Bull Hill diatreme and enveloping trachytic and
phonolitic intrusive rocks. The Bull Hill deposit area forms the bulk of the Bear Lodge
REE deposit and generally exhibits light REE-enrichment (LREE); defined as cerium
(Ce), lanthanum (La), neodymium (Nd), praseodymium (Pr), and samarium (Sm). The
Bull Hill mineralized zone extends approximately 1,700 feet (518 meters) in a north-
westerly direction, by 300 feet (91 meters) to more than 700 feet (213 meters) in a
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