IsoEnergy and Purepoint Confirm Uranium Discovery in Initial Drilling at the Dorado Joint Venture Project
IsoEnergy and Purepoint Confirm Uranium
Discovery in Initial Drilling at the Dorado Joint
Venture Project
Toronto, Ontario--(Newsfile Corp. - July 8, 2025) -
IsoEnergy Ltd. (NYSE American: ISOU) (TSX:
ISO)
("IsoEnergy")
and
Purepoint Uranium Group Inc. (TSXV: PTU) (OTCQB: PTUUF)
("Purepoint")
are pleased
to
announce a highly encouraging start to the inaugural drill program at their
50/50 Dorado project (
"Dorado"
or the
"Project"
), located in Saskatchewan's world-class Athabasca
Basin (Figure 1). Initial drilling at the Q48 target on the Project, completed by Purepoint as the operator
of the program, intersected uranium mineralization in two holes, with downhole gamma probe readings
up to 79,800 counts per second (CPS). The intercepts occur within strongly altered basement rocks –
suggesting an active uranium-bearing hydrothermal system.
Highlights
Initial drillholes at the Q48 target, located in the southern portion of the Project, have intersected
uranium mineralization, confirming the zone as a significant uranium-bearing structure. (Figure 2).
Drillholes PG25-04 and PG25-05 intersected a steeply dipping, north-south trending mineralized
structure at vertical depths of 60 and 20 metres below the unconformity, respectively.
Radioactivity readings from downhole probe measurements averaged 11,050 cps over 3.7 metres
with a maximum of 74,800 in PG25-04, and 27,750 over 2.3 metres with a maximum of 79,800 in
PG25-05 (See Table 1 for full details).
Mineralization is hosted within strongly clay-altered basement rocks—considered key indicators of
a uranium-bearing hydrothermal system consistent with known Athabasca-style deposits.
Q48 was originally highlighted as a high-priority target based on historic drilling that encountered
structurally disrupted, altered basement rocks with weak radioactivity, and further confirmed in
2022 by IsoEnergy's identification of brittle faults, shearing, and alteration along the conductive
trend.
A third follow-up hole is underway to further track the mineralized structure along the Q48
conductive corridor to the northeast. Approximately 5,400 metres in 18 drill holes are planned for
the Project in 2025.
"This is exactly the kind of start we were aiming for. These early results suggest we're on the trail of
something meaningful," said Chris Frostad, President and CEO at Purepoint. "These initial hits speak to
the quality of the target and the systematic approach our team is taking to uncover its potential. We're
moving quickly to follow up on these encouraging results as drilling continues."
Philip Williams, CEO and Director of IsoEnergy commented,
"Our JV project was created to focus
exploration where we see real discovery potential. This exploration success reinforces the strength of our
partnership with Purepoint. By combining deep Basin experience with a focused, well-funded program,
we believe we've positioned Dorado for continued success through a disciplined exploration effort. It's
exciting to see that approach already delivering promising results."
DDHs PG25-04 and PG25-05
Drill hole PG25-04 targeted the Q48 conductor (Figure 1) approximately 800 metres northwest of
IsoEnergy's 2022 drilling (Figure 2). The drill hole was collared with a dip of -60 degrees and
encountered Athabasca sandstone to a depth of 321 metres. Clay altered granitic gneiss and
pegmatites were drilled to 393 metres then garnet-rich pelitic gneiss, with local pyrite and graphite, was
drilled to the completion depth of 489 metres. The reddish-brown altered radioactive gouge seams were
hosted by a chloritized pegmatite (Figure 3) and returned an average of 64,220 cps over 0.4 metres
(Table 1).
Hole PG25-05 was collared using the same azimuth as PG25-04 and intercepted the radioactive
structure approximately 40 metres up-dip of that hole. The hole encountered the unconformity at 309
metres, clay altered granitic gneiss and pegmatites to 371 metres, then garnet-rich pelitic gneiss, locally
with pyrite and graphite, to the completion depth of 498 metres. The central mineralized structure was
hosted in a sheared / brecciated reddish-brown altered granitic gneiss (Figure 4) and returned an
average of 75,660 cps over 0.4 metres.
Table 1: Downhole Gamma Results of Drill Holes PG25-04 and PG25-05
Hole ID
From (m)
To (m)
Length (m)
Avg. cps
Max. cps
PG25-04
248.7
249.4
0.7
660
1,010
366.0
367.0
1.0
690
810
374.5
275.4
0.9
810
1,050
383.7
387.4
3.7
11,050
74,800
Includes
384.7
385.1
0.4
64,220
PG25-05
296.7
297.7
1.0
790
960
325.0
327.3
2.3
27,750
79,800
Includes
326.1
326.5
0.4
75,660
328.8
329.8
1.0
730
1,000
395.8
396.3
0.5
1,770
2,680
Note: Mt. Sopris 2PGA probe used to record downhole gamma readings
Q48 Zone
The Q48 zone lies within the southern portion of the Project and is characterized by a steeply dipping,
north-south trending conductive package identified through geophysical surveys. Historic drilling in the
area intersected strongly altered and structurally disrupted rocks at the unconformity and in the
basement, including garnetiferous pelitic gneiss, graphitic pelitic gneiss, and semipelite, with local weak
radioactivity and zones of intense clay alteration. These results, combined with the geophysical
response, highlighted Q48 as a highly prospective but underexplored target.
Drilling by IsoEnergy in 2022 confirmed that the conductive trend at Q48 hosts structure, shearing, and
alteration, characteristics of uranium-bearing hydrothermal systems in the Athabasca Basin. The current
program is designed to systematically follow-up and fully test the Q48 conductive corridor.
Figure 1: Location of the Larocque Trend, host to the high-grade Hurricane deposit and
multiple high-grade uranium occurrences within the newly formed Project. The Q48 Target
Area, priority focus for the 2025 drill program is highlighted.
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3218/258040_3b5a77fd24558932_003full.jpg
* See Qualified Person Statement below.
Figure 2: Location Map of 2025 Drill Program at Q48 Target Area
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3218/258040_3b5a77fd24558932_004full.jpg
Figure 3: PG25-04 Mineralization
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3218/258040_3b5a77fd24558932_005full.jpg
Figure 4: PG25-05 Mineralization
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3218/258040_3b5a77fd24558932_006full.jpg
About the Dorado Project
Dorado is the flagship project of the IsoEnergy-Purepoint 50/50 joint venture, a partnership
encompassing more than 98,000 hectares of prime uranium exploration ground. The Project includes the
former Turnor Lake, Geiger, Edge, and Full Moon properties, all underlain by graphite-bearing lithologies
and fault structures favorable for uranium deposition.
Recent drilling by IsoEnergy east of the Hurricane Deposit has intersected strongly elevated radioactivity
in multiple holes. The anomalous radioactivity confirms the continuity of fertile graphitic rock package
and further highlights the opportunity for additional high-grade discoveries across the region.
The shallow unconformity depths across the Dorado property-typically between 30 and 300 metres-allow
for highly efficient drilling and rapid follow-up on results.
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3218/258040_3b5a77fd24558932_007full.jpg
* See Qualified Person Statement below.
Gamma Logging and Geochemical Assaying
A Mount Sopris 2PGA-1000 downhole total gamma probe was utilized for radiometric surveying. The
total gamma results provided in Table 1 were selected using a cutoff of 500 cps over a 0.5 metre width.
All drill intercepts are core width and true thickness is yet to be determined.
Core samples are submitted to the Saskatchewan Research Council (SRC) Geoanalytical Laboratories
in Saskatoon. The SRC facility is ISO/IEC 17025:2005 accredited by the Standards Council of Canada
(scope of accreditation #537). The samples are analyzed for a multi-element suite using partial and total
digestion inductively coupled plasma methods, for boron by Na2O2 fusion, and for uranium by
fluorimetry.
Qualified Person Statement
The scientific and technical information contained in this news release relating to IsoEnergy and
Purepoint was reviewed and approved by Dr. Dan Brisbin, P.Geo., IsoEnergy's Vice President,
Exploration and Scott Frostad BSc, MASc, P.Geo., Purepoint's Vice President, Exploration, who are
"Qualified Persons" (as defined in NI 43-101 -
Standards of Disclosure for Mineral Projects
("NI 43-
101")).
For additional information with respect to the current mineral resource estimate for IsoEnergy's
Hurricane Deposit, please refer to the Technical Report prepared in accordance with NI 43-101 entitled
"Technical Report on the Larocque East Project, Northern Saskatchewan, Canada" dated August 4,
2022, available under IsoEnergy's profile at
www.sedarplus.ca
.
This news release refers to properties other than those in which IsoEnergy and Purepoint have an
interest. Mineralization on those other properties is not necessarily indicative of mineralization on the
Joint Venture properties.
About IsoEnergy Ltd.
IsoEnergy (NYSE American: ISOU) (TSX: ISO) is a leading, globally diversified uranium company with
substantial current and historical mineral resources in top uranium mining jurisdictions of Canada, the
U.S. and Australia at varying stages of development, providing near-, medium- and long-term leverage to
rising uranium prices. IsoEnergy is currently advancing its Larocque East project in Canada's Athabasca
basin, which is home to the Hurricane deposit, boasting the world's highest-grade indicated uranium
mineral resource. IsoEnergy also holds a portfolio of permitted past-producing, conventional uranium
and vanadium mines in Utah with a toll milling arrangement in place with Energy Fuels. These mines are
currently on standby, ready for rapid restart as market conditions permit, positioning IsoEnergy as a
near-term uranium producer.
About Purepoint
Purepoint Uranium Group Inc. (TSXV: PTU) (OTCQB: PTUUF) is a focused explorer with a dynamic
portfolio of advanced projects within the renowned Athabasca Basin in Canada. Highly prospective
uranium projects are actively operated on behalf of partnerships with industry leaders including Cameco
Corporation, Orano Canada Inc. and IsoEnergy Ltd.
Additionally, the Company holds a promising VMS project currently optioned to and strategically
positioned adjacent to and on trend with Foran Mining Corporation's McIlvenna Bay project. Through a
robust and proactive exploration strategy, Purepoint is solidifying its position as a leading explorer in
one of the globe's most significant uranium districts.
For more information, please contact:
IsoEnergy Ltd.
Philip Williams, CEO and Director
(833) 572-2333
www.isoenergy.ca
Purepoint Uranium Group Inc.
Chris Frostad, President & CEO
Phone: (416) 603-8368
Email:
Neither the Exchange nor its Regulation Services Provider (as that term is defined in the
policies of the Exchange) accepts responsibility for the adequacy or accuracy of this Press
release.
Cautionary Statement Regarding Forward-Looking Information
This press release contains "forward-looking information" within the meaning of applicable Canadian
securities legislation. Generally, forward-looking information can be identified by the use of forward-
looking terminology such as "plans", "expects" or "does not expect", "is expected", "budget",
"scheduled", "estimates", "forecasts", "intends", "anticipates" or "does not anticipate", or "believes", 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". This forward-looking information may
relate to additional planned exploration activities for 2025, including the timing thereof and the
anticipated results thereof; and any other activities, events or developments that the companies
expect or anticipate will or may occur in the future.
Forward-looking statements are necessarily based upon a number of assumptions that, while
considered reasonable by management at the time, are inherently subject to business, market and
economic risks, uncertainties and contingencies that may cause actual results, performance or
achievements to be materially different from those expressed or implied by forward-looking
statements. Such assumptions include, but are not limited to, that planned exploration activities are
completed as anticipated;
the anticipated costs of planned exploration activities, the price of uranium;
that general business and economic conditions will not change in a materially adverse manner; that
financing will be available if and when needed and on reasonable terms; and that third party
contractors, equipment and supplies and governmental and other approvals required to conduct the
Joint Venture's planned activities will be available on reasonable terms and in a timely manner.
Although each of IsoEnergy and Purepoint have attempted to identify important factors that could
cause actual results to differ materially from those contained in forward-looking information, there may
be other factors that cause results not to be as anticipated, estimated or intended. There can be no
assurance that such information will prove to be accurate, as actual results and future events could
differ materially from those anticipated in such statements. Accordingly, readers should not place
undue reliance on forward-looking information.
Such statements represent the current views of IsoEnergy and Purepoint with respect to future events
and are necessarily based upon a number of assumptions and estimates that, while considered
reasonable by IsoEnergy and Purepoint, are inherently subject to significant business, economic,
competitive, political and social risks, contingencies and uncertainties. Risks and uncertainties
include but are not limited to the following: the inability of the Joint Venture to complete the exploration
activities as currently contemplated; uncertainty of additional financing; no known mineral resources
or reserves; aboriginal title and consultation issues; reliance on key management and other
personnel; actual results of technical work programs and technical and economic assessments being
different than anticipated; regulatory determinations and delays; stock market conditions generally;
demand, supply and pricing for uranium; and general economic and political conditions. Other factors