Quantum Identifies Mica as Key Carrier of Critical Elements at NMX East, Québec Preliminary assays from pegmatite core reveal strong correlation between mica content and enrichment of Ga, Rb, Cs, Li, Nb, Sn, and Ta.
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Quantum Identifies Mica as Key Carrier of Critical Elements at NMX East, Québec
Preliminary assays from pegmatite core reveal strong correlation between mica content and
enrichment of Ga, Rb, Cs, Li, Nb, Sn, and Ta.
Vancouver, BC – September 4, 2025 – Quantum Critical Metals Corp. (TSX.V: LEAP | OTCQB: ATOXF | FSE:
86A1) ("Quantum" or the "Company") has received assays back on hand selected mica samples from
pegmatite core from the NMX East project, located in the Eeyou Istchee James Bay region of Québec.
A sample of pegmatite core was collected and sent to SGS Lakefield for mineralogy, metallurgical and
hydrometallurgical studies to better understand the association of gallium (Ga), rubidium (Rb), and cesium
(Cs) mineral association, and to perform hydrometallurgy to remove the metals from the drill core (News
releases of July 25, 2025).
As a precursor to the detailed mineralogical studies that are currently underway at SGS Lakefield, the
Quantum geologists hand selected three samples to test if Ga, Rb, Cs were associated with the mineral
mica. Samples 1 and 2 were thought to be comprised mostly of the mineral mica whereas sample 3 was
thought to contain other minerals such as feldspars and quartz. The three samples are shown in Figure 1.
Figure 1. Grab samples from pegmatite core.
The samples were sent to AGAT Laboratories in Calgary for assay and X-ray diffraction analysis . X-ray
diffraction is a technique which uses x-rays to identify minerals based on their internal unique crystal
structure. Table 1 shows the relative percentage of mica contained in each of the three samples and the
associated element content in grams per tonne.
Mica
content
Gallium
(Ga)
Lithium
(Li)
Niobium
(Nb)
Rubidium
(Rb)
Tin
(Sn)
Tantalum
(Ta)
Sample 1 21.2 wt % 93.7 391 180 1390 158 22.6
Sample 2 72.7 wt % 186 959 320 3220 347 71.5
Sample 3 0.7 wt % 21.3 23 10 1180 4 1.4
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Table 1. Mica content (%) and corresponding assay values (grams per tonne) for selected mica-rich pegmatite
samples
Samples with the highest mica content returned the highest values of multiple elements, suggesting that
mica is the main host of mineralization. For example, one mica- rich sample containing 72.7 wt % mica
(Sample 2) recorded values of 186 ppm Ga, 959 ppm Li, 320 ppm Nb 3,220 ppm Rb, 347 ppm Sn, and 71.5
ppm Ta. By contrast, a sample with only 0.7 wt % mica (Sample 3) contained much lower values: 21.3 ppm
Ga, 23 ppm Li, 10 ppm Nb, 1,180 ppm Rb, 4 ppm Sn, and 1.4 ppm Ta.
This new analysis of these mica samples from the pegmatite drill core from the NMX property highlights
a strong link between mica content and enrichment of several critical metals, including gallium (Ga),
lithium (Li), niobium (Nb), rubidium (Rb), tin (Sn), and tantalum (Ta). These results reinforce the theory of
mica acting as a host for mineralization in the NMX pegmatite systems.
Additional detailed mineralogy is currently being done at SGS Lakefield which will lead into the
hydrometallurgy studies where the metals are extracted from the minerals.
Assay QA/QC
The samples were hand selected from ¼ cut drill core. The geologist identified the minerals
macroscopically and pulled a sample of a few hundred grams. Because of this methodology, the results
do not represent the entire interval of 107 metres sampled for metallurgical testing, nor do the represent
the ore body itself. The samples were sent to AGAT Laboratories in Calgary. AGAT is certified and licensed
for a number of tests and is ISO 9001:2015 and also Standards Council of Canada accredited for mineral
analysis, chemical/physical testing. The samples underwent sodium peroxide fusion with ICP-OES and ICP-
MS finish.
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Why is this important?
If the detailed mineralogical studies being conducted at SGS align with the preliminary assay results, it
likely to confirm that the critical elements (Ga, Rb, Cs, Nb, Sn, Ta) are hosted within the mica. This is good
news for Quantum because this makes it easier to remove these elements from the rock. Basically, the
elements can be concentrated once that one mineral is isolated from the rock which makes the
hydrometallurgy (removal of the minerals) easier.
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NMX East Property
The NMX East project is 100% owned by Quantum Critical Metals Corp. The site has historically been
explored for the lithium potential in the pegmatites at site. Quantum has recently been studying the
gallium association within the pegmatite with the objective of determining the feasibility of extracting the
metal from the pegmatite. The site is also strategically located near Power Metallic Mines Inc. (TSXV -
PO BOX 31880
Steveston Village, BC, V7E 0B5, Canada
tel: 604.428.2900
www.quantumcriticalmetals.com
PNPN) which announced a recently expanded land position near its Nisk -Lion-Tiger polymetallic
discoveries. On June 9th, 2025, a land acquisition of 167 km² from Li-FT Power Ltd. (TSXV-LIFT) highlighted
the regional development and underscores the broader area’s potential for polymetallic exploration.
Power Metallic Acquires 167KM² from Li-FT Power, Expanding Nisk - Lion Polymetallic Project Area by over
300%
Quantum key developments on NMX East to date:
• Significant Critical Metals Discoveries
A detailed reassessment of drill core assays from both Québec projects has confirmed elevated
and consistent intervals of gallium, rubidium, cesium, niobium, and tantalum . These results
support the identification of two distinct gallium-rubidium-cesium mineralized systems within the
Company’s portfolio.
• Early Metallurgical Focus to Accelerate Recovery Assessment
Quantum is prioritizing mineralogical and metallurgical studies ahead of a formal resource
estimate to evaluate the economic viability of metal recovery . This proactive approach aims to
fast-track development and position the Company at the forefront of critical metal supply efforts
in North America.
• Innovative Gallium Recovery from Mica
Initial findings suggest gallium may be hosted in mica , a non-traditional source. While gallium is
typically extracted as a byproduct of bauxite or zinc processing, historical studies show it can be
recovered from mica using processing methods like floatation, followed by hydrometallurgy acid
leaching techniques. The Company is engaging multiple laboratories to optimize this process.
• Strengthening Domestic Supply Chains
In light of China’s December 2024 ban on gallium exports , Quantum’s discoveries represent a
timely and strategic opportunity to support North American critical mineral independence. These
metals are essential for high -tech applications, including semiconductors, telecommunications,
defense, and renewable energy.
Qualified Person
George M. Yordanov, P.Geo., a consultant to the Company, is the Qualified Person who has reviewed and
approved the scientific and technical disclosure in this news release.
About Quantum Critical Metals Corp.
Quantum Critical Metals Corp. (TSX.V: LEAP) (OTCQB: ATOXF) (F SE: 86A1) is a Canadian mineral
exploration company focused on advancing critical metals projects that power next -generation
PO BOX 31880
Steveston Village, BC, V7E 0B5, Canada
tel: 604.428.2900
www.quantumcriticalmetals.com
technologies. With a growing portfolio of promising assets —including the NMX East Gallium -Rubidium-
Cesium Project in Québec, the Discovery Gallium-Rubidium-Cesium and polymetallic project in Qu ébec,
the Victory Antimony Project in British Columbia, and the newly acquired Prophecy Germanium-Gallium-
Zinc Project in British Columbia, among others, the Company is strategically positioned to support the
West’s transition to a secure and sustainable critical metals supply.
To stay updated on Quantum’s latest developments, sign up for our mailing list and visit
www.quantumcriticalmetals.com and www.sedarplus.com.
Marcy Kiesman, CEO
Telephone: 604.428.2900 or 604.339.2243
Email: [email protected]
Website: www.quantumcriticalmetals.com
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