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Bear Lodge Property – Location Map
Geological Setting
The Bear Lodge Mountains of northeast Wyoming are composed primarily of the upper levels of a mineralized
Tertiary alkaline
‐
igneous complex that is a component of the Black Hills Uplift of western South Dakota and
northeast Wyoming. Tertiary alkaline intrusive bodies in the northern Black Hills occur along a N70-80W trending
belt that extends from Bear Butte in South Dakota, through the Bear Lodge Mountains, to Devil’s Tower and
Missouri Buttes in northeast Wyoming. The Bear Lodge mining district is in the Bear Lodge Mountains, near the
western end of the northern Black Hills intrusive belt. The Bear Lodge Mountains expose and are underlain by
multiple alkaline plugs, sills, and dikes and intruded into Precambrian basement and Paleozoic and Mesozoic
sedimentary rocks approximately 38 – 52 million years ago. Rare earth and gold mineralization are found in separate
areas of the central crest and northern part of the Bear Lodge Mountains.
The Bear Lodge alkaline-igneous complex is a northwest-trending alkaline intrusive dome with dimensions of
approximately 10 kilometers NW-SE by 6 kilometers NE-SW. The complex consists predominantly of multiple
intrusions of phonolite, trachyte, and other alkaline igneous rocks, and a variety of associated breccias and
diatremes.
Exploration and Drilling
Historical exploration in the Bear Lodge district, including REE exploration carried out by the Company from 2004
through 2012, is summarized in the Technical Report dated October 9, 2014. Exploration activities carried out by
the Company in 2013 and 2014 were limited as the focus turned to development drilling at the Bull Hill and
Whitetail Ridge deposits. These exploration activities included geochemical, geophysical, geological and
mineralogical modeling of the district and individual deposits.
