IsoEnergy Commences Drilling to Expand Hurricane Zone and Explore Larocque East Project, Provides Geiger Drilling Update
IsoEnergy Commences Drilling to Expand Hurricane Zone and Explore
Larocque East Project, Provides Geiger Drilling Update
Saskatoon, SK, September 3, 2021 – IsoEnergy Ltd. (“ IsoEnergy” or the “ Company”) (TSXV: ISO; OTCQX: ISENF) is
pleased to announce that following the completion of drilling at it s Geiger property, drilling has commenced at its
100% owned Larocque East project, home to the Hurricane zone high-grade uranium deposit.
Tim Gabruch, President and Chief Executive Officer commented: “IsoEnergy’s summer exploration program has been
progressing well. We recently completed our 12-hole drill program at Geiger and the team has moved over to our
Larocque East project where drilling has now begun. The work at Geiger was completed successfully, and safely,
and marks IsoEnergy’s first drill program outside of the Larocque East property since the Hurricane z one was
discovered during the summer program in 2018. Work now transitions back to our flagship Larocque East site, home
of the Hurricane zone. We are excited to get back on the ground there, having delayed our return because of COVID-
19.
Andy Carmichael, Vice President of Exploration commented : “Drilling in 2020 was the most successful to date at
Hurricane with intersections of strong mineralization over significant widths leading to the identification of a high-
grade domain. The team is excited to resume growing the Hurricane zone as well as drill testing high -priority
exploration targets, particularly along the fertile Larocque Lake conductive trend.”
As announced on July 26 th, 2021, d iamond d rilling at Larocque East will comprise 30 drill hole s totalling 12,000
metres and will have three objectives: Expansion; Infill; and Exploration. Twelve drill holes are planned to expand
the footprint of the Hurricane zone and will include drilling at both the western and the eastern side s of the zone .
Four infill drill holes are planned between existing drill fences to provide val uable information on the continuity of
the higher-grade portions of the zone . Figure 2 shows the Expansion and Infill target areas in plan view. Fourteen
exploration drill holes are planned in two target areas. The main target area is a three-kilometre-long section of the
Larocque Lake trend where DC-resistivity signatures similar to that of Hurricane are present and historical drilling
has intersected alteration, structures, graphitic basement, and anomalous geochemistry. The second target a rea
includes trends of decreased resistivity in the sandstone and basement and is located southeast of and subparallel
to the Hurricane zone stratigraphy. Figure 3 shows the exploration target areas in plan view.
Geiger Drilling Complete
Diamond drilling at Geiger concluded in August. Twelve diamond drill holes totalling 4, 428 metres were completed
to evaluate an area where historical drill holes intersected anomalous results. Geological interpretation is underway
and geochemical assay results are expected in a few weeks . While several drill holes intersected positive features ,
the most n oteworthy result is the discovery of a zone of significant sandstone alteration associated with the 3B
electromagnetic (EM) conductor. The 3B conductor was identified by IsoEnergy in July, during a reinterpretation of
historical airborne geophysical survey data (Figure 4).
The newly discovered alteration zone was first intersected by drill hole GG21- 21 while following- up anomalous
historical drill hole Q3- 006 by evaluating the 3A conductor (Figure 4) . GG21 -21 intersected wide intervals of
moderately to strongly b leached sandstone cored by a 50 -metre-long interval hosting structurally controlled clay
enrichment, desilicified zones, and l ocal hydrothermal hematite centred 100 metres south of the 3A conductor
(Figure 5). GG21-27 followed-up GG21 -21 by evaluat ing the sub-parallel 3B conductor and locat ing inferred
basement structure s controlling the alteration in the overlying sandstone . GG21-27 intersected moderately to
strongly bleached intervals in the sandstone as well as a zone of graphitic faulting in the basement 155 metres below
the unconformity which correlates to the centre of the 50-metre zone of increased alteration and structure in GG21-
21. Importantly, the 3B conductor associated with this sandstone alteration and graphitic basement has been tested
only indirectly by the two 2021 drill holes and is completely untested along its remaining 4.5 kilometres of strike
length (Figure 4).
The Larocque East Property and the Hurricane Zone
The 100% owned Larocque East property consists of 33 mineral claims totaling 16,780ha. Two of the project’s claims
distal to the Hurricane zone are subject to a 2% Net Smelter Returns Royalty of which 1% may be bought back for
$1Million at IsoEnergy’s discretion . Larocque East is immediately adjacent to th e north end of IsoEnergy’s Geiger
property and is 35km northwest of Orano Canada’s McClean Lake uranium mine and mill.
Along with other target areas, the Larocque East Property covers a 15 -kilometre-long northeast extension of the
Larocque Lake conductor s ystem; a trend of graphitic metasedimentary basement rocks that is associated with
significant uranium mineralization at the Hurricane zone, and in several occurrences on Cameco Corp. and Orano
Canada Inc.’s neighbouring property to the southwest of Larocque East. The Hurricane zone was discovered in July
2018 and was followed up with 29 drill holes in 2019 and an additional 48 drill holes in 2020. Dimensions are
currently 575m along-strike, up to 75m wide, and up to 11m thick. The zone is open for expansion along -strike to
the east and to the north and south on some sections. Mineralization is polymetallic and commonly straddles the
sub-Athabasca unconformity 320 m below surface. The best intersection to date is 38.8% U 3O8 over 7.5m in drill
hole LE20-76. Drilling at Cameco Corp.’s Larocque Lake zone on the neighbouring property to the southwest has
returned historical intersections of up to 29.9% U 3O8 over 7.0m in drill hole Q22- 040. Like the nearby Geiger
property, Larocque East is located adjacent to the Wollaston-Mudjatik transition zone - a major crustal suture related
to most of the uranium deposits in the eastern Athabasca Basin. Importantly, the sandstone cover on the Property
is thin, ranging between 140m and 450m in previous drilling.
Figure 1 – IsoEnergy Athabasca Basin Projects
Figure 2 – Larocque East Expansion and Infill Drilling Areas
Figure 3 – Larocque East Exploration Drilling Areas
Figure 4 – Geiger 2021 Drilling Plan View with Section Q3-3700E Location (UNDER CONSTRUCTION)
Figure 5 – Section Q3-3700E (Drill Holes GG21-21 and GG21-27) (UNDER CONSTRUCTION)
Qualified Person Statement
The scientific and technical information contained in this news release was prepared by Andy Carmichael, P.Geo.,
IsoEnergy’s Vice President, Exploration, who is a “Qualified Person” (as defined in NI 43-101 – Standards of Disclosure
for Mineral Projects). Mr. Carmichael has verified the data disclosed. As mineralized drill holes at the Hurricane zone
are oriented very steeply (-70 to -90 degrees) into a zone of mineralization that is interpreted to be horizontal, the
true thickness of the intersections is expected to be greater than or equal to 90% of the core lengths. This news
release refers to properties other tha n 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 Company’s Larocque East Project, including its qual ity 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 eastern Athabasca Basin in Saskatchewan, Canada. The Company recently discovered the high- grade
Hurricane Zone of uranium mineralization on its 100% owned Larocque East property in the Eastern Athabasca Basin.
IsoEnergy is led by a Board and Management team with a track record of success in uranium exploration,
development, and operations. The Company was founded and is supported by the tea m at its major shareholder,
NexGen Energy Ltd.
Tim Gabruch
President and Chief Executive Officer
IsoEnergy Ltd.
+1 306-261-6284
www.isoenergy.ca
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