Critical Resources Limited has announced the commencement of a field exploration program at the Corona Pegmatite, located approximately 4 kilometres north of its existing Mavis Lake Lithium Deposit in Ontario, Canada. The Corona target sits within the same lithium-caesium-tantalum pegmatite corridor that hosts the company’s current mineral resource of 8.0 million tonnes at 1.07% lithium, representing a significant opportunity to expand the resource base and drill pipeline ahead of the 2026 exploration program.
The Corona field program targets an underexplored approximately 5 kilometre strike length of LCT pegmatite that has received minimal modern lithium-focused exploration activity. Surface mapping has already identified pegmatite bodies up to 70 metres wide across the target area, suggesting substantial prospectivity. The limited outcrop exposure due to overburden and wetland cover is particularly noteworthy, as it indicates strong potential for concealed spodumene-bearing systems that remain undetected by previous exploration efforts. This geological setting mirrors the broader conditions at Mavis Lake, enhancing the technical confidence in the Corona target.
Critical Resources has assembled a comprehensive technical foundation for the Corona systematic field targeting program. The exploration dataset includes surface geochemistry samples, lithogeochemistry analysis, LIBS-based pegmatite fractionation studies, and high-resolution aeromagnetic data. This integrated approach significantly de-risks the exploration program by providing multiple data types to guide field activities and drill target definition. The company has engaged an experienced field crew with prior knowledge of the Mavis Lake Project, positioning the team to efficiently execute the program and maximise the quality of data collection.
From an investor perspective, this announcement represents a strategic advancement in the company’s strategy to develop Mavis Lake from a single-deposit asset into a multi-deposit lithium district. The timing of the program, with mobilisation planned for late April 2026 following snow melt conditions and geochemical results expected in late Q2 2026, provides clear near-term catalysts for the investment case. The identification of additional mineral resources within the same geological system could substantially enhance the project’s economic profile and development timeline by increasing total contained lithium inventory and potentially enabling economies of scale in future development scenarios.
The Corona field program also serves a dual purpose of supporting and expanding the company’s planned 2026 exploration program more broadly. By systematically building a pipeline of drill-ready targets across the pegmatite trend, Critical Resources is positioning itself to execute an efficient and focused exploration campaign. Investors should monitor the progression of field work through to late Q2 when geochemical results are expected to define high-priority follow-up targets. The success of surface mapping and target generation will be critical indicators of whether Corona can effectively contribute to the broader lithium district vision for Mavis Lake. This announcement is price sensitive and has been flagged as material by the ASX.
View the full ASX announcement (PDF)
About Critical Resources Limited (ASX: CRR)
Critical Resources Limited engages in the exploration and development of mineral projects in Australia and Canada, focusing on lithium, zinc, lead, copper, silver, and gold deposits. The company’s flagship project is the Mavis Lake Lithium Project located in Ontario, Canada, which is being advanced as a critical metals project for the decarbonized energy transition.
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