PMET Resources has reported its widest and highest-grade caesium intercepts to date at the Vega Zone within its Shaakichiuwaanaan Property, alongside confirming high-grade mineralisation at the newly discovered Helios Zone.
- Record caesium intercepts at Vega Zone including 28.0 m at 8.05% Cs2O
- Peak caesium assay of 29.79% Cs2O recorded at Vega
- New high-grade Helios Zone discovered with 1.0 m at 21.52% Cs2O
- Expanded footprint and width of caesium mineralisation at Vega and Rigel Zones
- 8,596 m of drilling results reported with 1,176 m pending from 7 holes
Record-Breaking Caesium Intercepts at Vega
PMET Resources Inc. has delivered its most impressive caesium assay results to date from the 2025 drill campaign at the Shaakichiuwaanaan Property in Quebec. The standout intercepts come from the Vega Zone within the CV13 Pegmatite, where the company reported a remarkable 28.0 metres grading 8.05% caesium oxide (Cs2O), including a high-grade core of 18.3 metres at 11.84% Cs2O. Notably, a peak sample hit an extraordinary 29.79% Cs2O, setting a new benchmark for the project.
These results not only highlight the exceptional grade but also an expansion in the interpreted footprint and width of caesium mineralisation at Vega. Multiple intercepts exceeded 20% Cs2O, underscoring the zone’s potential as a world-class caesium deposit.
Discovery of the Helios Zone and Rigel Zone Advances
Adding to the excitement, PMET confirmed high-grade caesium mineralisation at the newly discovered Helios Zone, with an intercept of 1.0 metre at 21.52% Cs2O near surface. This discovery opens new avenues for resource expansion within the CV13 Pegmatite.
Meanwhile, infill drilling at the Rigel Zone yielded encouraging results, including 6.2 metres at 5.12% Cs2O with a high-grade section of 2.1 metres at 13.68% Cs2O. The eastern boundary of Rigel’s mineralisation footprint has been revised based on these latest assays, which will feed into the upcoming Mineral Resource Estimate update.
Context Within a District-Scale Critical Minerals Project
The Shaakichiuwaanaan Property is already recognised as hosting one of the largest lithium-tantalum pegmatite resources globally, alongside the world’s largest pollucite-hosted caesium pegmatite resource. The CV13 Pegmatite, where Vega, Rigel, and Helios zones are located, lies approximately 3 kilometres from the CV5 Pegmatite, which recently underwent a positive lithium-only Feasibility Study.
PMET’s 2025 drill campaign has been extensive, with 245 holes completed across the property. The current announcement covers caesium assay results from 52 holes totalling 8,596 metres, with results from an additional 7 holes (1,176 metres) still pending. These results will be integrated into updated geological models and Mineral Resource Estimates, supporting the company’s plans for an updated Feasibility Study on the CV5 Pegmatite later in 2026.
Implications for Shareholders and Market Position
Executive Vice President Exploration Darren L. Smith emphasised the significance of these results, noting the potential to enhance shareholder value through the high-grade caesium mineralisation, which is dominated by pollucite mineralogy. The combination of scale, grade, and ongoing discoveries positions PMET Resources as a key player in the critical minerals sector, particularly given the strategic importance of caesium alongside lithium and tantalum.
With the property accessible year-round and proximal to regional infrastructure, the company is well placed to advance development. The pending assay results and forthcoming resource updates will be closely watched by investors seeking exposure to critical mineral supply chains.
Bottom Line?
As PMET Resources integrates these record caesium grades into its resource models, the market awaits the next phase of development that could cement its status as a critical minerals powerhouse.
Questions in the middle?
- How will the pending assay results from the remaining holes impact the overall caesium resource estimate?
- What are the timelines and potential scale for commercial production of caesium alongside lithium and tantalum?
- How might evolving market demand for caesium influence PMET’s project economics and strategic partnerships?