PMET Conducts Large Scale Caesium Sampling Program at CV13 Collection of pollucite pegmatite samples at scale supports ongoing development studies including further concentrate recovery and downstream caesium chemical testwork
PMET Resources Inc.
Suite 900 - 1801 McGill College, Montreal, Qc, Canada, H3A 1Z4
www.pmet.ca / TSX: PMET / ASX: PMT / OTC: PMETF / FSE: R9GA
PMET Conducts Large Scale Caesium Sampling Program at CV13
Collection of pollucite pegmatite samples at scale supports ongoing development studies including further
concentrate recovery and downstream caesium chemical testwork
September 8, 2026 – Montreal, QC, Canada September 9, 2026 – Sydney, Australia
HIGHLIGHTS
• More than 2.5 tonnes of pollucite pegmatite collected to date from outcrop at the
Vega Zone (CV13).
• Collection utilizing very large diameter drill core (~30 cm) from a grid of shallow holes
(<60 cm) over mineralized outcrop offering significant advantages:
o Larger size fragments (~30 cm) and larger quantity of sample.
o Fast and low-cost collection method.
o Pollucite concentrate derived from the se samples will support larger scale
downstream chemical testwork programs and industry product engagement.
• The Company continues engaging with strategic caesium players downstream , including
building on its existing relationship with Koch Technology Solutions for chemical
processing.
• Samples of pollucite pegmatite outcrop will continue to be collected as practical through
the fall, with ore sorting testwork anticipated to begin in Q4 2026.
PMET RESOURCES INC. (THE “COMPANY” OR “PMET”) (TSX: PMET) (ASX: PMT)
(OTCQX: PMETF) (FSE: R9GA) is pleased to provide an update on its previously announced
program targeting the collection of multiple tonne samples of pollucite pegmatite, supporting
ongoing development testwork for concentrate production and downstream initiatives
(collectively, the “BerryPick” program) . The sample is being collected from an outcrop of the
Vega Caesium Zone at the CV13 Pegmatite, where previous channel sampling returned 3.0 m at
9.43% Cs2O (see news release dated April 9, 2025).
More than 2.5 tonnes of pollucite pegmatite ha s been collected to date by way of an innovative
shallow coring sampling program utilizing very large diameter drill core (~30 cm) from a grid of
shallow holes (<60 cm) over the mineralized outcrop occurrence (Figure 1, Figure 2, Figure 3,
and Figure 4). The core samples collected from the outcrop will be composited and submitted
for ore sorting testwork, including geochemical analysis, which is anticipated to commence in Q4
2026. Final grades of composites will be announced with ore sorting test program results when
received and compiled.
Figure 1: (TOP) Shallow coring drill rig set-up directly on top of pollucite pegmatite outcrop at the CV13
Vega Zone, where previous channel sampling returned 3.0 m at 9.43% Cs2O (see news release dated April
9, 2025); (BOTTOM) Interval of p ollucite pegmatite drill core recovered (~30 cm x 20 cm). Core is
estimated at >90% pollucite presenting as massive crystals with common spodumene/pollucite/lepidolite
veining (see Table 1).
Figure 2: (TOP) Cored drill hole (~30 cm diameter) in pollucite pegmatite outcrop; (BOTTOM) Grid of
cored drill holes (~30 cm diameter) in pollucite pegmatite outcrop (see Table 1). Segments between holes
are jackhammered out and added to sample composite.
Figure 3: Bulk tonnage bags of pollucite pegmatite sample composites ready for shipping to the lab (see
Table 1).
Pollucite (as described in Figure 1, Figure 2, Figure 3, and Table 1) has been determined based on visual
identification, portable XRF readings on site, as well as prior sampling and geochemical assay of the
outcrop (see news release dated April 9, 2025). The core samples collected from the outcrop will be
composited and submitted for ore sorting testwork, including geochemical analysis, which is anticipated
to commence in Q4 2026. Final grades of composites will be announced with ore sorting test program
results when received and compiled. Visual estimates of mineral abundance should never be considered
a proxy or substitute for laboratory analyses where concentrations or grades are the factor of principal
economic interest. Visual estimates also potentially provide no information regarding impurities or
deleterious physical properties relevant to valuations.
Table 1: Estimate of abundances of any minerals observed per ASX Compliance Update 04/23.
Figure Number Nature of
Occurrence Visual Estimates of Mineral(s) & Abundance Expected Timing
of Assays
Figure 1 (Top) Massive/veined >5% pollucite in orange area with minor amounts of
lepidolite & spodumene, remainder feldspar>quartz Mid 2027
Figure 1 (Bottom) Massive/veined >90% pollucite with common spodumene/lepidolite and
minor feldspar/quartz Mid 2027
Figure 2 (Top) Massive/veined >5% pollucite in orange area with minor amounts of
lepidolite & spodumene, remainder feldspar>quartz Mid 2027
Figure 2 (Bottom) Massive/veined >5% pollucite in orange area with minor amounts of
lepidolite & spodumene, remainder feldspar>quartz Mid 2027
Figure 3 Massive/veined
~15% pollucite, common spodumene/lepidolite, minor
feldspar>quartz (LEFT); <5% pollucite, minor
spodumene/lepidolite, minor feldspar>quartz (RIGHT)
Mid 2027
SAMPLE COLLECTION METHODOLOGY AND TESTWORK
The sample collection methodology undertaken in the BerryPick program offers significant
advantages. It provides larger diameter samples (~30 cm) required for more advanced ore sorting
testwork. Having larger size pegmatite fragments (upwards of 30 cm) is required for future
feasibility level data and allows for a more accurate assessment of recovery behavior during a
mining operation as the sample better approximates blasted Run of Mine material after crushing
compared to drill core.
Prior testwork had been limited to NQ (4.8 cm) and HQ (6.4 cm) core sizes as this was what
material size was available, which was sufficient to support initial testwork programs. The
BerryPick program samples will provide much larger size fragments at greater
volume suitable for feasibility level assessment.
The current sampling program methodology also a voids the alternative (and significantly more
expensive) methods of collection for large-size fragments at sufficient scale (which could include
blasting and/or PQ coring – 8.5 cm) to support more advanced test programs. Further, it allows
for large quantities of representative pollucite concentrate sample to be generated over a much
shorter time period.
The Company’s primary objective of this program is to produce 500 – 1,000 kg of pollucite
concentrate to support ongoing development testwork for pollucite concentrate production and
downstream caesium chemical testwork. This would include potential future chemical testwork
programs with Koch Technology Solutions, as the Company furthers engagement with strategic
partners in the caesium industry downstream (see news releases dated April 15, 2026 and July
12, 2026).
The Company will continue to collect pollucite pegmatite samples as practical through the fall
with ore sorting testwork anticipated to begin in Q4 2026 with results anticipated to be received
and announced in the first half of 2027.
Figure 4: Principal pollucite pegmatite outcrop at the Vega Zone, CV13 Pegmatite (i.e., collection site
for BerryPick).
In addition to being one of the largest lithium-tantalum pegmatite Mineral Resources1 and lithium
pegmatite Mineral Reserves2 globally, the Property also hosts the world’s largest in-situ pollucite-
hosted caesium pegmatite Mineral Resource, comprising 0.69 Mt at 4.40% Cs2O (Indicated) and
1.70 Mt at 2.40% Cs2O (Inferred). The CV13 Pegmatite, host to the caesium Mineral Resource,
is located <3 km along trend from the CV5 Pegmatite, which is situated approximately 13 km
south of the regional Trans -Taiga Road and powerline infrastructure corridor, and is accessible
year-round by road.
1 Consolidated MRE (CV5 + CV13 pegmatites) totals 108.0 Mt at 1.40% Li 2O and 166 ppm Ta 2O5 (Indicated), and 33.4 Mt at 1.33%
Li2O and 155 ppm Ta 2O5 (Inferred), at an Li 2O cut-off grade of 0.40% (open -pit), 0.60% (underground CV5), and 0.70% (underground
CV13). A grade constraint of 0.50% Cs 2O was used to model the Rigel and Vega caesium zones, contained entirely within CV13, with a
MRE of 0.69 Mt at 4.40% Cs2O (Indicated), and 1.70 Mt at 2.40% Cs2O (Inferred). The Effective Date is June 20, 2025. Mineral Resources
are not Mineral Reserves as they do not have demonstrated economic viability. Mineral Resources are inclusive of Mineral Reserves.
2 Probable Mineral Reserve of 84.3 Mt at 1.26% Li2O at the CV5 Pegmatite with a cut-off grade is 0.40% Li2O (open-pit) and 0.70% Li2O
(underground). Underground development and open -pit marginal tonnage containing material above 0.37% Li 2O are also included in the
statement. The Effective Date is September 11, 2025. See Feasibility Study news release dated October 20, 2025.
QUALIFIED/COMPETENT PERSON
The technical and scientific information in this news release that relates to the Mineral Resource
Estimate, exploration, and metallurgical results (including BerryPick as described herein) for the
Company’s properties is based on, and fairly represents, information compiled by Mr. Darren L.
Smith, M.Sc., P.Geo., who is a Qualified Person as defined by National Instrument 43 -101 –
Standards of Disclosure for Mineral Projects (“NI 43 -101”), and member in good standing with the
Ordre des Géologues du Québec (Geologist Permit number 01968), and with the Association of
Professional Engineers and Geoscientists of Alberta (member number 87868). Mr. Smith has
reviewed and approved the related technical information in this news release.
Mr. Smith is an Executive and Vice President of Exploration for PMET Resources Inc. and holds
common shares, Restricted Share Units (RSUs), Performance Share Units (PSUs), and options in
the Company.
Mr. Smith has sufficient experience, which is relevant to the style of mineralization, type of deposit
under consideration, and to the activities being undertaken to qualify as a Competent Person as
described by the Australasian Code for Reporting of Exploration Results, Mineral Resources and
Ore Reserves (the JORC Code). Mr. Smith consents to the inclusion in this news release of the
matters based on his information in the form and context in which it appears.
The information in this news release that relates to the Mineral Reserve Estimate and Feasibility
Study is based on, and fairly represents, information compiled by Mr. Frédéric Mercier-Langevin,
Ing. M.Sc., who is a Qualified Person as defined by NI 43-101, and member in good standing with
the Ordre des Ingénieurs du Québec. Mr. Mercier -Langevin has reviewed and approved the
related technical information in this news release.
Mr. Mercier-Langevin is the Chief Operating and Development Officer for PMET Resources Inc.
and holds common shares, RSUs, PSUs, and options in the Company.
ABOUT PMET RESOURCES INC.
PMET Resources Inc. is a pegmatite critical mineral exploration and development company
focused on advancing its district -scale 100%-owned Shaakichiuwaanaan Property located in the
Eeyou Istchee James Bay region of Quebec, Canada, which is accessible year-round by all-season
road and proximal to regional hydro-power infrastructure.
In late 2025, the Company announced a positive lithium -only Feasibility Study on the CV5
Pegmatite for the Shaakichiuwaanaan Property and declared a maiden Mineral Reserve of 84.3 Mt
at 1.26% Li 2O (Probable) 3. The study outlines the potential for a competitive and globally
significant high-grade lithium project targeting up to ~800 ktpa spodumene concentrate using a
simple Dense Media Separation (“DMS”) only process flowsheet. Further, the results highlight
Shaakichiuwaanaan as a potential North American critical mineral powerhouse with significant
opportunity for tantalum and caesium in addition to lithium.
3 See Feasibility Study news release dated October 20, 2025. Probable Mineral Reserve cut-off grade is 0.40% Li2O (open-pit) and 0.70%
Li2O (underground). Underground development and open -pit marginal tonnage containing material above 0.37% Li 2O are also included in
the statement. Effective Date of September 11, 2025.
The Project hosts a Consolidated Mineral Resource 4 totalling 108.0 Mt at 1.40% Li 2O and 166
ppm Ta2O5 (Indicated) and 33.4 Mt at 1.33% Li 2O and 155 ppm Ta2O5 (Inferred), and ranks as a
top ten lithium pegmatite globally in size. Additionally, the Project hosts the world’s
largest pollucite-hosted caesium pegmatite Mineral Resource at the Rigel and Vega zones with
0.69 Mt at 4.40% Cs2O (Indicated), and 1.70 Mt at 2.40% Cs2O (Inferred).
This news release has been approved by
“KEN BRINSDEN”
Kenneth Brinsden, President, CEO, & Managing Director
Olivier Caza-Lapointe
Head, Investor Relations
T: +1 (514) 913-5264
DISCLAIMER FOR FORWARD-LOOKING INFORMATION
This news release contains “forward -looking statements” and “forward -looking information”
within the meaning of applicable securities laws.
All statements, other than statements of present or historical facts, are forward -looking
statements. Forward -looking statements involve known and unknown risks, uncertainties and
assumptions and accordingly, actual results could differ materially from tho se expressed or
implied in such statements. You are hence cautioned not to place undue reliance on forward-
looking statements. Forward-looking statements are typically identified by words or expressions
such as “ supports”, “ongoing”,, “continues”, “building”, “anticipated”, “advancing”, “objectives”
or variations of such words or expressions and phrases or statements that certain actions, events
or results “may”, “could”, “would”, “might” or “will” be taken, occur or be achieved.
Forward-looking statements include, but are not limited to, statements concerning the timing of
certain activities mentioned in this press release, the savings expected from the current sampling
methodology program as well as the ability to to produce >500 kg to potentially >1 tonne of
pollucite concentrate from the program.
Forward-looking statements are based upon certain assumptions and other important factors
that, if untrue, could cause actual results to be materially different from future results expressed
or implied by such statements. There can be no assurance that for ward-looking statements will
prove to be accurate. Key assumptions upon which the Company’s forward-looking information
is based include, without limitation, the ability to obtain the required financing to bring the Project
to development, the ability to make discoveries, the potential of each of tantalum, lithium and
caesium, that proposed exploration work on the Property and the results therefrom will continue
as expected, the accuracy of reserve and resource estimat es, the classification of resources and
the assumptions on which the reserve and resource estimates are based, long -term demand for
lithium (spodumene), tantalum (tantalite), and caesium (pollucite) supply, and that exploration
4 Consolidated MRE (CV5 + CV13 pegmatites) is reported at an Li2O cut-off grade of 0.40% (open -pit), 0.60% (underground CV5), and
0.70% (underground CV13). A grade constraint of 0.50% Cs 2O was used to model the Rigel and Vega caesium zones, contained entirely
within CV13. The Effective Date is June 20, 2025. Mineral Resources are not Mineral Reserves as they do not have demonstrated economic
viability. Mineral Resources are inclusive of Mineral Reserves.