Eclipse Metals Doubles Greenland Rare Earth Resource to 208 Mt with Strong Metallurgical Results

Grønnedal Resource Surges Past 200 Million Tonnes

Eclipse Metals Ltd (ASX:EPM) has delivered a major leap in its Greenland rare earths project, announcing a new Mineral Resource Estimate (MRE) at Grønnedal of 208 million tonnes grading 0.72% Rare Earth Oxides (REO). This represents a 234% increase in tonnage and a 12% uplift in grade compared to the previous 89.2Mt at 6,363 ppm TREO reported in 2025. The updated resource includes 6Mt at 0.71% REO classified as Indicated and 202Mt at 0.72% REO as Inferred, substantially thickening the project’s critical mineral footprint in a jurisdiction increasingly coveted for its strategic minerals.

The expansion stems from the 2025 diamond drilling program which intersected continuous carbonatite mineralisation from surface to depths of approximately 190 metres. All five drill holes returned significant widths of rare earth element (REE) mineralisation, with neodymium and praseodymium, a key magnet rare earth duo, comprising over 30% of total TREO in many intervals. The drilling results support a shallow-dipping, higher-grade zone exceeding 1% TREO that extends from surface down to depth, reinforcing the deposit’s potential scale and continuity. These findings echo the extensive high-grade intersections Eclipse previously confirmed during its 2025 campaign extensive high-grade rare earth mineralisation.

Metallurgical Work Highlights Magnetic Amenability

Complementing the resource growth, Eclipse reported encouraging Phase 1 metallurgical test results from the Grønnedal deposit. Wet High-Intensity Magnetic Separation (WHIMS) sighter tests demonstrated strong magnetic amenability, with over 90% of REE mineralisation reporting to combined magnetic fractions. This suggests potential for significant mass reduction ahead of hydrometallurgical processing, a key cost lever in rare earth extraction.

The mineralogical profile, confirmed by SGS Canada, identifies key host minerals such as synchysite, bastnäsite, and monazite, with liberation rates up to 54% for synchysite/bastnäsite at relatively coarse grain sizes. These characteristics compare favourably with operating global rare earth producers, indicating that Grønnedal’s mineralogy could support simpler, lower-cost beneficiation routes. The Phase 1 test work outcomes pave the way for more detailed representative testing using quarter-core samples from the 2025 drill program, now underway in Perth strong magnetic response at Grønnedal.

Strategic Positioning and Infrastructure Advantages

Situated in southwest Greenland, the Ivigtût Project, including the Grønnedal REE deposit, benefits from existing infrastructure such as a power station, heliport, and deep-water port access. This logistical advantage is rare among critical minerals projects globally and enhances the project’s appeal to Western markets seeking to diversify supply chains. Eclipse is actively engaging U.S. government advisory partners and exploring offshore capital market opportunities to complement its ASX listing, aiming to boost international investor engagement and shareholder value advances Greenland rare earths with drilling.

Geopolitically, Grønnedal aligns with Greenland’s Mineral Resources Strategy 2025–2029 and Western policy mandates targeting resilient rare earth supply chains for electric vehicles, wind turbines, and defence technologies. The project’s low uranium content, averaging 4.16 ppm, remains well below Greenland’s 100 ppm regulatory threshold, simplifying permitting pathways.

Northern Territory Uranium Portfolio Progress

Beyond Greenland, Eclipse continues to advance its Northern Territory uranium assets through a binding option and earn-in agreement with Boss Energy Limited (ASX:BOE). This partnership offers a technical and financial platform to develop uranium projects while allowing Eclipse to concentrate on its rare earth ambitions. Engagement with the Northern Land Council is ongoing to ensure culturally appropriate access arrangements and environmental compliance.

Next Steps and Investor Considerations

Eclipse plans to continue integrating geological, analytical, and metallurgical datasets to refine resource models and optimise beneficiation pathways. The company cautions that further technical work is necessary to validate economic extraction and process design before formal resource upgrades. Meanwhile, strategic funding readiness and offshore capital market initiatives remain active, reflecting Eclipse’s ambition to position Grønnedal as a cornerstone of Western critical minerals supply.