Critical Resources Confirms Multiple New Pegmatites at Mavis Lake

Field Program Uncovers Expanded Lithium Potential at Mavis Lake

Critical Resources Limited (ASX:CRR) has wrapped up a 10-day field exploration campaign at the Corona Pegmatite Field and adjacent northern targets within its Mavis Lake Lithium Project in Ontario, Canada. The program confirmed 14 pegmatite bodies, six of which are previously unmapped, across a corridor that had seen limited systematic prospecting until now. This expanded footprint bolsters the prospectivity of the northern Mavis Lake corridor as a significant lithium-bearing system.

The fieldwork involved geological mapping, structural measurements, and the collection of 106 rock samples now en route for geochemical assays expected within three to four weeks. These assays will provide key insights into lithium fertility and fractionation trends, crucial for prioritising drill targets ahead of the 2026 Northern Prospects exploration campaign.

Strategic Implications for Multi-Deposit Lithium District

Located roughly 4 kilometres north of CRR’s existing 8.0 million tonnes at 1.07% Li2O inferred mineral resource, the Corona area lies within a broader spodumene-beryl-tantalite zonation corridor. The identification of multiple pegmatites in this underexplored zone supports the company’s vision of evolving Mavis Lake from a single-deposit asset into a multi-deposit lithium district. This approach aims to diversify resource centres and enhance project optionality.

Managing Director Tim Wither emphasised the significance of the findings, noting that the northern corridor’s scale and underexplored nature make the discovery of six new pegmatites particularly encouraging. He highlighted that the upcoming assay results will sharpen drill targeting and underpin resource expansion efforts. This district-scale strategy aligns with CRR’s integrated mine-to-market lithium model, which links upstream resource development with downstream solid-state battery technology initiatives underway in the United States.

Integration with Advanced Battery Technology Development

CRR’s lithium exploration at Mavis Lake is complemented by its solid-state battery evaluation program, anchored by the Amorphous Solid-State Electrolyte (ASE) workstream. Collaborating with the South Dakota School of Mines & Technology and supported by the U.S. National Science Foundation, recent laboratory results have demonstrated stable electrolyte performance over 1,200 hours at room temperature, addressing key technical challenges in battery development.

This vertical integration from lithium supply through to battery technology development differentiates CRR from conventional explorers and positions it to capitalise on emerging commercial pathways in next-generation energy storage.

Next Steps and Exploration Pipeline

The company plans to integrate the pending assay data with its extensive geological, structural, and geophysical datasets to rank and prioritise drill targets across the northern corridor. The 2026 Northern Prospects campaign will focus on advancing high-priority targets such as Gullwing, which already holds an Exploration Target of 7–10 million tonnes at 0.3–1.2% Li2O, and other prospects including Tot, Little Wing, Coates, Drope, and the Corona field itself.

These targets collectively form a pipeline supporting CRR’s ambition to transform Mavis Lake into a multi-deposit lithium district, potentially feeding next-generation solid-state battery technology. The company’s recent landholding expansion to over 400 square kilometres further underpins this growth strategy.