IsoEnergy Provides Winter Exploration Update
IsoEnergy Provides Winter Exploration Update
Saskatoon, SK, April 21, 2023 – IsoEnergy Ltd. (“IsoEnergy” or the “ Company”) (TSXV: ISO; OTCQX:
ISENF) is pleased to provide an update on winter 202 3 exploration activities on its 100% owned
Larocque East, Hawk and Geiger projects, all located in the northeastern region of the Athabasca Basin
of Saskatchewan (Figure 1). Larocque East hosts the Company’s high-grade Hurricane Deposit.
Highlights:
• Five drill holes completed at Hawk totalling 4,273 metres.
• Six drill holes totaling 1,909 metres completed at Larocque East.
• Ground geophysical surveys completed at Larocque East, Geiger and Hawk.
Tim Gabruch, President and Chief Executive Officer commented: “IsoEnergy has completed a safe and
successful winter program of drilling and geophysics at our Larocque East, Hawk and Geiger projects.
This valuable work has further advanced our understanding of these projects and the information will
be analyzed to help develop our pipeline of drill- ready targets, starting with plans for the upcoming
summer exploration program. As with all drill programs IsoEnergy undertakes, we employ a systematic
methodology to optimize the value of each metre drilled and determine what prospectivity exists to
make future discoveries.”
Darryl Clark, Vice President of Exploration commented: “Along the Kernaghan Trend of the Larocque
East property, drilling systematically explored the prospective Larocque Lake conductive trend. On the
Hawk project our maiden drill program was successful in identifying alteration and associated
structure in the sandstone and the basement . Assay results from this drilling are pending.
Furthermore, to prepare for the potential of s ummer and winter drill program s to follow up on this
highly prospective project, additional ground EM was conducted at Hawk. Concurrently, ground EM
geophysical surveying was completed at Laro cque East and Geiger and has successfully generated
quality targets for future drill programs. In my experience the target generation methodology used
here has worked very well and the prospectivity in these areas is high.”
Note: Radioactivity is total gamma counts per second (cps) from drill core measured with an RS-125
hand-held spectrometer (RS-125).
Hawk Project Drilling Results
Drilling at Hawk recently concluded with the primary objective of testing electromagnetic conductors
identified in the 2022 geophysical survey. Winter drilling comprise d five diamond drill holes totaling
4,273 metres. An additional 36 line-kilometres of fixed-loop electromagnetic geophysical surveying
was completed over key drill targets (Figure 2).
The first -pass drilling was successful, intersecting graphitic conductors and prospective brittle
structures in the southern half of the property. Basal sandstone intersected in HK23-03 are pervasively
bleached with metre- scale zones of structure, desilicification, clay alteration, and “grey” sulphide
related alteration which increase in strength near the unconformity. In HK23-05A located 350 metres
north, the upper and middle sandsto ne contain metre scale zones of fractured and fault disrupted
sandstone, with the middle structure associated with desilicification, clay alteration, and bleaching.
Anomalous radioactivity associated with sulphide mineralisation was intersected at the unconformity
of HK23-05A up to 350 cps (Table 1, Figure 3).
Table 1 – Winter 2023 Radioactive Intersections
Larocque East Project - Kernaghan Trend Drilling and Geophysics
The winter program f ollowed up d rilling on the eastern portion of the Kernaghan trend to test
favourable results previously identified in the summer of 2022. Six holes totalling 1,909 metres were
completed (Figure 4). Drill hole LE23-146 was designed to test previously defined basement alteration
(drill hole LE22-144) and intersected hematite and hydrothermal clay alteration in the basement that
is typically proximal to uranium mineralisation in the Athabasca Basin. The remaining holes were
designed to systematically test along the two kilometres of alteration strike length intersected in the
2022 winter drill program.
Two lines of Stepwise Moving Loop Transient Electromagnetic (SWML TEM) survey lines totalling 26.8
km were completed at Western Kernaghan (Figure 4) over an untested magnetic low corridor. The
objective of the survey was to pinpoint basement conductors to target first-pass drill testing of the
area. Historically, conductors have been outlined along strike, east of property boundary. The survey
was successful and follow -up drill testing is planned for the summer season in 2023.
Geiger Project Geophysical Results
Six lines of SWML TEM surveying completed at the Geiger project, advanced three areas to a drill-
ready level (Figure 5).
Three EM profiles completed in the Q23 North area identified a 2.1 km strike length of basement
conductors. The 2.1 km-long Q23 North area has been tested by only two historical drill holes, Q23 -
003 and Q23-010. Q23-003 intersected moderate structure and a lteration in the basal sandstone as
well as fault structures in graphitic basement rocks. Q23 -010 intersected moderate sandstone
structure and alteration as well as weakly graphitic basement rocks . Anomalous U -partial values as
well as other pathfinder ele ments were intersected in the sandstone of both drill holes. Relevant
historical d rilling was also completed north of this area which reported structure and alteration in
several drill holes as well as two metres of anomalous radioactivity with a peak of 2,300 cps 20 metres
below the unconformity in drill hole ML22-006 (F3 Uranium Corp. News Release August 10, 2022).
Conductive anomalies were also identified in the Q24 and Bent Lake areas. Historical drilling in the
Q24 area comprises five drill holes, Q24 -001 through Q24 -005. Q24 -001 intersected anomalous
radiometry at the unconformity (up to 2 ,450 cps) and a graphitic basement as well as elevated
radiometry hosted in pitchblende -coated fractures throughout the basement. Drill fences on either
side along section of this hole failed to identify an extension of the uranium mineralization. No
historical drilling has been completed in the Bent Lake survey area; however, uranium mineralization
has been intersected to the northwest as well as to the southeast of the survey area with drill holes
Q23-005 and Q23- 009. Drill hole Q23 -005 intersected strong structure and alteration in the basal
sandstone as well as anomalous radiometric peaks extending ten metres into the basement with a
maximum of 5,674 counts per second. Drill hole Q23-009 intersected strong structure and alteration
in the basal sandstone as well at a peak of 723 cps above the unconformity.
Diamond drilling is planned for the second half of 2023 to follow-up the winter 2023 EM survey results.
Hole-ID From
(m)
To
(m)
Length
(m)
Radioactivity
Min-Max
(CPS)
Chemical Assays Orientation
(Azm/Dip)
Hole Length
(m) U3O8
(%)
Ni (%)
HK23-05A 693.5 694 0.5 60-350 Pending -70 779
Figure 1 – Athabasca Property Map
Figure 2 – Hawk Project Drilling & Ground Geophysical Survey Area
Figure 3 Hawk Drill Hole HK23-05A Cross Section
Figure 4 – Larocque East - Kernaghan East Trend Drilling & Ground Geophysical Survey Areas
Figure 5 – Geiger Project Ground Geophysical Survey Areas
Qualified Person Statement
The scientific and technical information contained in this news release was prepared by Dr Darryl
Clark, P.Geo., IsoEnergy Vice President, Exploration, who is a “Qualified Person” (as defined in NI 43 -
101 – Standards of Disclosure for Mineral Projects ). Dr Clark has verified the data disclosed. All
radioactivity measurements reported herein are total gamma from an RS -125 hand -held
spectrometer. All ‘HK', 'GG' and 'LE' series drill holes were completed by IsoEnergy, and geochemical
analyses were completed fo r the Company by SRC Geoanalytical Laboratories in Saskatoon,
Saskatchewan. All other drill holes were completed by previous operators and geochemical assay data
has been compiled from historical assessment reports or provided by the previous operator(s). This
news release refers to properties other than those in which the Company has an interest.
Mineralization on those other properties is not necessarily indicative of mineralization on the
Company’s properties. For additional information regarding the Co mpany’s Larocque East Project,
including its quality assurance and quality control procedures, please see the Technical Report dated
effective May 15, 2019, on the Company’s profile at www.sedar.com.
About IsoEnergy
IsoEnergy is a well-funded uranium exploration and development company with a portfolio of
prospective projects in the infrastructure -rich eastern Athabasca Basin in Saskatchewan, Canada. In
2018, the Company discovered the high-grade Hurricane Deposit on its 100% owned Larocque East
property in the Eastern Athabasca Basin. The Hurricane Deposit has Indicated Mineral Resources of
48.61 Million lb U3O8 based on 63,800 tonnes grading 34.5% U3O8 and Inferred Mineral Resources of
2.66 Million lb U3O8 based on 54,300 tonnes grading 2.2% U3O8 (July 8, 2022). The Hurricane Deposit
is 100% owned by IsoEnergy and is unencumbered from any royalties. IsoEnergy is led by a Board and
Management team with a track record of su ccess in uranium exploration, development, and
operations. The Company was founded and is supported by the team at its major shareholder, NexGen
Energy Ltd.
Tim Gabruch
President and Chief Executive Officer
IsoEnergy Ltd.
+1 306-261-6284
www.isoenergy.ca
Investor Relations
Kin Communications
+1 604 684 6730
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operating history of the Company, the influence of a large shareholder, alternative sources of energy
and uranium prices, aboriginal title and consultation issues, reliance on key management and other
personnel, actual results of exploration activities being different than anticipated, changes in
exploration programs based upon results, availability of third party contractors, availability of
equipment and supplies, failure of equipment to operate as anticipated; accidents, effects of weather
and other natural phenomena and other risks associated with the mineral exploration industry,
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