EAGLE POINT AND ARROW ZONE ANALOGY
By: Garrett Ainsworth, BSc, PGeo
INTRODUCTION TO EAGLE POINT:
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Eagle Point Uranium deposits are located on the eastern edge of the Athabasca Basin,
and are part of the Rabbit Lake Uranium district, which also includes the Rabbit Lake and
Collins Bay deposits.
The Rabbit Lake Uranium District has produced more than 190 million pounds of
uranium concentrates since production began in 1975
(http://www.cameco.com/businesses/uranium-operations/canada/rabbit-lake).
In 1987, a historical (non 43-101 compliant) “total ore reserve” for the Eagle Point
deposits comprised approximately 140 Million pounds (64,000 tonnes) at an average
grade of about 2.0% U3O8*. Production commenced in 1994.
The Eagle Point underground mine is in production today, and as of December 31, 2013
has:
 estimated proven and probable reserves of 1,642,100 tonnes at 0.56% U3O8
(20.3 Million pounds U3O8);
 estimated indicated resource of 1,152,600 tonnes at 0.80% U3O8 (20.2 Million
pounds U3O8);
 estimated inferred resource of 708,500 tonnes at 0.58% U3O8 (9.0 Million
pounds U3O8).
 Reference: http://www.cameco.com/businesses/uraniumoperations/canada/rabbit-lake/reserves-resources
Eagle Point was initially discovered in 1980 by Gulf Minerals Canada Ltd. while drill
testing geophysical and geochemical anomalies northeast along strike from the Collins
Bay Uranium deposits.
The Eagle Point deposits are a series of moderately to steeply dipping tabular veins and
lenses, which are concordant and discordant to variably graphitic Wollaston Group
metasediments and underlying Archean granitoid gneiss.
EAGLE POINT AND ARROW ZONE SIMILARITIES:
THE STRUCTURE
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The Eagle Point and Collins Bay deposits are associated with northeast trending reverse
faults where graphitic horizons exhibit breccia, shear, and crackle zones. Similar
graphitic horizons are observed at the Arrow zone, which are thought to be related to
Riedel shear structures.
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Mineralization is often concentrated at intersections with cross cutting northerly subvertical wrench faults.
The lack of consistent association between mineralization and lithology, the discordant
nature of the veins, and the presence of microstructures within the veins substantiates
that mineralization is structurally controlled.
At Eagle Point, morphology of the faults has been influenced by the layered nature and
marked contrasts in the competency of the Wollaston Group metasediments, by the
Wollaston Group metasediment and Archean granitoid gneiss contact, and by folds
within these rocks. This competency contrast exists at the Arrow zone, as the East Lloyd
Domain metasediments and an Archean granodiorite/mafic complex contact. Further
contrasts within the metasediments exist between hard silicified semipelite and soft
pelite (+/- graphite).
Major reverse faults often develop within less competent graphitic metasediments,
where portions of mineralized bodies are often controlled by these faults. However,
significant mineralization is also observed with cross cutting faults in non-graphitic
metasediments and granitoid gneiss.
Eagle Point deposits and the Arrow zone appear to plunge away from the Athabasca
Basin.
THE ALTERATION
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Zones of extreme alteration extend less than one meter to three meters from
mineralization. Key alteration products associated with mineralization include sudoite
(Mg-chlorite), illite, and carbonate.
Alteration spatially associated with mineralization comprises chloritization and
illitization of feldspar, bleaching of mafic minerals, and hematization. Hematization is
directly associated with mineralization, and is thought to be related to the most recent
alteration event.
At Eagle Point, boron enrichment (dravite) is associated with the bleached zones within
five to ten meters from mineralization and along the graphitic shear zones. In addition,
the Arrow zone exhibits impressive dravite-breccia halos around the mineralization.
Carbonaceous material with a characteristic odour associated with higher grade
mineralization has been observed as small sooty blebs and buttons.
THE MINERALIZATION
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Uranium mineralization occurs as lenses, pods, and veins that are concordant and
discordant to the metamorphic stratigraphy.
Differs significantly from typical unconformity-type uranium deposits where arsenides
and other deleterious elements are not present. Uranium mineralization at Eagle Point
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(and the Arrow zone) contains few impurities which would affect the amenability of
mineralization to processing. In addition, the Arrow zone contains notable
concentrations of gold (10.0 m @ 10.78 g/t Au in drill hole AR-14-30), silver, and copper,
which are potentially of economic interest.
Little chemical variation exists within the Eagle Point uranium deposits such that
complex blending or grade control process is not required, which would increase the
overall production costs. At this early stage of development, the Arrow zone appears to
also show little chemical variation.
Intense clay hydrothermal alteration is restricted to mineralized zones, which has left
the surrounding host basement rock as competent. This is favourable for underground
mining extraction methods.
PROSPECTIVITY ALONG STRIKE
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Eagle Point is at the edge of the present day Athabasca Basin where the Collins Bay A
zone is located approximately 1.5 km along strike to the southwest within the Athabasca
Basin. Collins Bay A zone was a flat lying unconformity-style uranium deposit that was
extracted through open-pit mining from 1995 to 1997. Further to the southwest of
Eagle Point, the Collins Bay B and D zones were also mined out unconformity-style
deposits.
The Arrow zone is scarcely inside the present day Athabasca Basin where no drill testing
has occurred within 4 km along strike to the northeast within the Athabasca Basin, and
within 3 km along strike to the southwest outside of the Athabasca Basin.
*Eldorado Resources Limited. 1987. The Eagle Point Uranium Deposits. Saskatchewan
Geological Society. Economic Minerals of Saskatchewan. Pg. 78-98.
Information Contained In This Presentation
This presentation is a summary description of NexGen Energy Ltd. NexGen or the and its business and does not purport to be complete. This
presentation is not, and in no circumstances is it to be construed as, a prospectus, an advertisement, or a public offering of securities. No
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information on adjacent properties that was obtained from various publicly available sources referred to herein and the accuracy and
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applicable securities laws including statements with respect to the properties, a concurrent financing, our plans for exploration and development
of our properties and our financial condition, operations and prospects. The forward-looking information reflects current expectations regarding
future results, performance or achievements and speaks only as of the date of this presentation. When used in this presentation, forwardlooking information can be identified by such words as “intend”, “estimate” and other similar terminology. Such forward-looking information
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Company to be materially different from any future results, performance or achievements expressed in or implied by such information. Such
risks, uncertainties and other factors include, but are not limited in any manner to those risks set forth in this presentation under the heading
“Risk Factors”, including, the risk that no mineralization will be identified on the Radio and Rook I properties; the Company’s dependence on
third party financing; the Company’s limited operating history; risks inherent in exploration activities; environmental and safety risks including
increased regulatory burdens; unexpected geological or hydrological conditions; a possible deterioration in political support for nuclear energy;
changes in government regulations and policies, including trade laws and policies; demand for nuclear power; failure to obtain necessary
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financing and its ability to successfully develop its properties. Although management of the Company believes that the assumptions underlying,
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could cause actual results to differ materially from the results discussed in the forward-looking statements.