NexGen Reports 2021 Exploration and Site Geotechnical Confirmation Drilling Results
NexGen Reports 2021 Exploration and Site Geotechnical Confirmation Drilling Results
Vancouver, BC, January 27, 2022 – NexGen Energy Ltd. (“NexGen” or the “Company”) ( TSX: NXE) (NYSE: NXE)
(ASX: NXG) is pleased to announce radioactivity results and the completion of the 2021 field programs that focused
on exploration and a detailed geotechnical site confirmation program at the Arrow Deposit (“Arrow” or the
“Project”) at the 100% owned, Rook I property, in the Athabasca Basin, Saskatchewan.
2021 Exploration Program Highlights:
The 2021 exploration program completed 18 drill holes for a total of 10,849.04 m, of which 6,400.31 m targeted
electromagnetic conductors (conductors) that neighbour the one hosting Arrow and 4,448.73 m targeted
significantly below the current Arrow Deposit. See Figure 1 for exploration drill hole locations.
• AR-21-268 (“Below Arrow”) intersected 8.5 m of total composite mineralization, including 6.5 m up to
3,530 cps from 1128.5 to 1135.0 m downhole. This intersection is located approximately 230 m below and
SE of the current defined mineralized domains at Arrow (Figure 2).
• RK-21-140 (Camp East Target on the Patterson Corridor ) intersected anomalous radioactivity up to 1,380
counts per second (cps) from 166.0 to 167.0 m downhole. Finely disseminated uraninite was intersected
with associated hematite and sericite alteration in a silicified orthogneiss.
• Drilling on the Derkson and Derkson West conductors intersected intervals of brittle structural disruption
and hydrothermal alteration consistent with those recognized in uranium bearing systems. Hole RK-21-
136 (Derkson West target) intersected 0.5 m of anomalous radioactivity up to 3,100 cps from 166.5 to 167.0
m downhole.
See Table 1 for scintillometer results.
Leigh Curyer, Chief Executive Officer, commented: “ The 2021 exploration results have confirmed the
unprecedented prospectivity for discovery of additional Arrow type mineralization zones at Rook I , particularly,
considering the limited number of holes completed during the short season as a consequence of the pandemic. In
addition, the site geotechnical confirmation drilling has confirmed the highly competent ground conditions for
development and operation , which have been incorporated into the Environmental Impact Study scheduled for
completion this quarter. NexGen is entering a very exciting 2022 with the stage of Rook I’s development, continued
exploration of numerous targets and initiation of site based infrastructure activities , during a time the global
population is recognizing the significant importance of nuclear energy in providing baseload clean air energy.”
Grant Greenwood, Vice President, Exploration, commented: “ The results highlight additional mineralization is
present below Arrow that was not previously identified in the resource wireframes. In addition, regional results
along the Patterson and Derkson corridors have identified numerous new intersections of radioactivity, brittle
structural disruption, and hydrothermal alteration, significantly elevating the prospectivity of those targets for
immediate follow up in 2022.”
2021 Exploration Drilling Objectives:
“Below Arrow”
Based on structural interpretation and geophysical anomalies that extend below current known uranium
mineralization at Arrow, three (3) diamond drill holes were designed as greater than 300 m steps down -dip from
current Arrow Deposit wireframes. Intersections of anomalous radioactivity in two (2) of the three (3) holes
exemplifies that mineralization exis ts below the current Arrow Deposit wireframes, indicating further
mineralization potential at depth.
“Regional”
The primary focus of the 2021 regional exploration program test ed conductors parallel and east of the conductor
that is home to the Arrow Deposit along with other NexGen discoveries, including South Arrow, Cannon, Bow and
Harpoon. These parallel conductors display stacked geophysical anomalies that share similar characteristics to those
initially highlighting Arrow as a prospective target. Results of the 2021 regional exploration program demonstrate
fertility of the conductors located on the Camp East, Derkson, and Derkson West target areas. Intersections of
brittle structural disruption that include alteratio n and anomalous radioactivity provide guidance for follow -up
exploration in vectoring towards potential economic accumulations of uranium.
Figure 1: 2021 Exploration – Drill holes Completed
Figure 2: 2021 Below Arrow Exploration – Drill holes Completed – Plan View (left) and Cross Section looking
Northeast (right).
Table 1: 2021 Exploration Drill Hole Data
Drill Hole
Unconformity
Depth - Basement
De (m)
Handheld Scintillometer Results (RS-120/125)
Hole ID Azimuth Dip Total
Depth (m) From (m) To (m) Width (m) CPS Range
AR-21-266 314 -73 1482.73 129.50 1058.50 1060.00 1.50 <500 - 1475
AR-21-266a 314 -73 120.00 N/A No Anomalous Radioactivity
AR-21-267 314 -73 1446.00 117.30 No Anomalous Radioactivity
AR-21-268 314 -73 1400.00 113.75 964.00 965.50 1.50 <500 - 795
1125.00 1125.50 0.50 <500 - 550
1128.50 1135.00 6.50 <500 - 3530
RK-21-131 300 -65 501.00 51.00 No Anomalous Radioactivity
RK-21-132 300 -65 468.00 34.00 No Anomalous Radioactivity
RK-21-133 300 -65 555.00 49.00 No Anomalous Radioactivity
RK-21-134 300 -65 516.63 57.70 No Anomalous Radioactivity
RK-21-135 310 -70 534.00 81.00 273.00 273.50 0.50 <500 - 510
RK-21-136 310 -70 447.00 88.10 166.50 167.00 0.50 <500 - 3100
319.50 320.50 1.00 <500 - 500
RK-21-137 310 -70 534.00 90.70 No Anomalous Radioactivity
RK-21-138a 310 -70 96.88 90.00 No Anomalous Radioactivity
RK-21-138 310 -70 486.00 82.30 No Anomalous Radioactivity
RK-21-139 315 -65 495.00 84.00 No Anomalous Radioactivity
RK-21-140 315 -70 479.40 80.95 88.50 89.50 1.00 <500 - 810
166.00 167.00 1.00 <500 - 1380
RK-21-141 315 -70 488.00 92.10 No Anomalous Radioactivity
RK-21-142 315 -70 465.00 84.00 No Anomalous Radioactivity
RK-21-143 315 -70 334.40 79.90 No Anomalous Radioactivity
Note: Radioactivity is gamma radiation measured in counts per second (cps) from drill core using a handheld RS -125
scintillometer. Assay results are pending.
2021 Site Confirmation Program Highlights:
Simultaneous to the regional exploration drill program, field work was completed in support of Front-End
Engineering Design (FEED), which consisted of two components:
1. Surface studies to confirm near-surface geotechnical conditions in locations of surface infrastructure and
assess pote ntial borrow pit locations to support the completion of FEED, detailed engineering, and
execution planning; and
2. Diamond drilling to confirm rock mass characteristics proximal to the planned underground Life-of-Mine
(LOM) infrastructure and Underground Tailings Management Facility (UGTMF).
The field work associated with the surface studies encompassed 18 sonic drill holes with various geophysical testing
and piezometer installations, and the excavation of 93 tests pits ± plate load testing. 72 of the test pits and all 18 of
the sonic boreholes were dedicated to confirming the subsurface cond itions beneath proposed surface
infrastructure, such as the mine terrace, waste and ore storage stockpiles, the airstrip, access road, and various
ancillary structures. The remaining 21 test pits evaluated potential borrow source materials.
The drilling of seven (7) HQ diamond drill holes (GAR-21-037 to GAR-21-043) for a total of 5,076.45 m (Figure 3)
were completed as part of th e 2021 program. All holes were geotechnically logged under RMR89 logging criteria,
nested vibrating wire piezometers (VWP) were installed in three (3) holes, and four (4) holes were sampled for
geomechanical characterization. Point load testing, density measurements, and acoustic televiewer surveys were
completed on all holes. Hydraulic packer testing was performed on all hole s to measure water conductivity in
various rock units and along structures. Results confirmed the rock mass within and proximal to the UGTMF and
LOM infrastructure to be competent, largely unaltered and structureless, and measured to have low hydraulic
conductivity which are all beneficial geotechnical and hydrogeological properties for the development and
maintenance of underground infrastructure. The program confirmed the low hydraulic conductivity assumed in
previous engineering studies , validated the location and relative position of the UGTMF , shafts, and LOM
infrastructure, and substantiated the ground support and design of the UGTMF.
Figure 3: Plan view of the geotechnical drill hole traces underlain with the Feasibility Study Mine Design.
About NexGen
NexGen is a British Columbia corporation focused on the development of the Rook I Project located in the
southwestern Athabasca Basin, Saskatchewan, Canada into production. The Rook I Project is supported by a NI 43-
101 compliant Feasibility Study which outlines elite environmental performance as well as industry leading
economics. Rook I hosts the Arrow Deposit that hosts Measured Mineral Resources of 209.6 M lbs of
U3O8 contained in 2.18 M tonnes grading 4. 35% U3O8, Indicated Mineral Resources of 47.1 M lbs of
U3O8 contained in 1.57 M tonnes grading 1.36% U3O8, and Inferred Mineral Resources of 80.7 M lbs of
U3O8 contained in 4.40 M tonnes grading 0.83% U3O8.
NexGen has a highly experienced team of uranium industry professionals with a successful track record in the
discovery of uranium deposits and in developing projects through discovery to production. The Company is the
recipient of the 2018 PDAC Bill Dennis Award for Canadian mineral discovery and the 2019 PDAC Environmental
and Social Responsibility Award.
Contact Information
Leigh Curyer
Chief Executive Officer
NexGen Energy Ltd.
+1 604 428 4112
www.nexgenenergy.ca
Travis McPherson
Senior Vice President Corporate Development
NexGen Energy Ltd.
+1 604 428 4112
http://www.nexgenenergy.ca
Technical Disclosure
All technical information in this news release has been reviewed and approved by Anthony (Tony) George, P. Eng.,
NexGen's Chief Project Officer and Matthew Batty, P. Geo., NexGen’s Geology and Resource Lead, as qualified
persons under National Instrument 43-101.
A technical report in respect of the FS is filed on SEDAR ( www.sedar.com ) and EDGAR
(www.sec.gov/edgar.shtml ) and is available for review on NexGen Energy's website (www.nexgenenergy.ca ).
Cautionary Note to U.S. Investors
This news release includes Mineral Reserves and Mineral Resources classification terms that comply with reporting
standards in Canada and the Mineral Reserves and the Mineral Resources estimates are made in accordance with
NI 43-101. NI 43-101 is a rule developed by th e Canadian Securities Administrators that establishes standards for
all public disclosure an issuer makes of scientific and technical information concerning mineral projects. These
standards differ from the requirements of the Securities and Exchange Commission ("SEC") set the SEC's rules that
are applicable to domestic United States reporting companies. Consequently, Mineral Reserves and Mineral
Resources information included in this news release is not comparable to similar information that would generally
be disclosed by domestic U.S. reporting companies subject to the reporting and disclosure requirements of the
SEC Accordingly, information concerning mineral deposits set forth herein may not be comparable with
information made public by companies that report in accordance with U.S. standards.
Forward-Looking Information
The information contained herein contains "forward-looking statements" within the meaning of applicable United
States securities laws and regulations and "forward-looking information" within the meaning of applicable
Canadian securities legislation. "Forward -looking information" includes, but is not limited to, statements with
respect to mineral reserve and mineral resource estimates, the 2021 Arrow Deposit, Rook I Project and estimates of
uranium production, grade and long-term average uranium prices, anticipated effects of completed drill results on
the Rook I Project, planned work programs, completion of further site investigations and engineering work to
support basic engineering of the project and expected outcomes. Generally, but not always, forward -looking
information and statements can be identified by the use of words such as "plans", "expects", "is expected", "budget",
"scheduled", "estimates", "for ecasts", "intends", "anticipates", or "believes" or the negative connotation thereof or
variations of such words and phrases or state that certain actions, events or results "may", "could", "would", "might"
or "will be taken", "occur" or "be achieved" or t he negative connotation thereof. Statements relating to "mineral
resources" are deemed to be forward -looking information, as they involve the implied assessment that, based on
certain estimates and assumptions, the mineral resources described can be profitably produced in the future.
Forward-looking information and statements are based on the then current expectations, beliefs, assumptions,
estimates and forecasts about NexGen's business and the industry and markets in which it operates. Forward -
looking information and statements are made based upon numerous assumptions, including among others, that the
mineral reserve and resources estimates and the key assumptions and parameters on which such estimates are based
are as set out in this news release and the technical report for the property , the results of planned exploration
activities are as anticipated, the price and market supply of uranium, the cost of planned exploration activities, that
financing will be available if and when needed and on reasonable terms, that third party contractors, equipment,
supplies and governmental and other approvals required to conduct NexGen's planned exploration activities will
be available on reasonable terms and in a timely manner and that general business and economic co nditions will
not change in a material adverse manner. Although the assumptions made by the Company in providing forward
looking information or making forward looking statements are considered reasonable by management at the time,
there can be no assurance that such assumptions will prove to be accurate in the future.
Forward-looking information and statements also involve known and unknown risks and uncertainties and other
factors, which may cause actual results, performances and achievements of NexGen to differ materially from any
projections of results, performances and achievements of NexGen expressed or implied by such forward -looking
information or statements, including, among others, the existence of negative operating cash flow and dependence
on third party financing, uncertainty of the availability of additional financing, the risk that pending assay results
will not confirm previously announced preliminary results, conclusions of economic valuations, the risk that actual
results of exploration activ ities will be different than anticipated, the cost of labour, equipment or materials will
increase more than expected, that the future price of uranium will decline or otherwise not rise to an economic
level, the appeal of alternate sources of energy to ur anium-produced energy, that the Canadian dollar will
strengthen against the U.S. dollar, that mineral resources and reserves are not as estimated, that actual costs or
actual results of reclamation activities are greater than expected, that changes in proj ect parameters and plans