Eclipse Metals has more than doubled its Grønnedal Rare Earth Element resource in Greenland to 208 million tonnes at 0.72% TREO, including a first-ever 6Mt Indicated Resource, marking a pivotal step toward project development and Western critical minerals supply chain relevance.
- Resource jumps 234% to 208Mt at 0.72% TREO
- Initial 6Mt Indicated Resource established
- Contains 1.5Mt total rare earth oxides including 456,000t Pr-Nd
- Feasibility studies underway with further drilling planned
- Strategically positioned in Western rare earths supply chains
Grønnedal Resource More Than Doubles with Higher Grade
Eclipse Metals Ltd (ASX:EPM) has delivered a major mineral resource upgrade at its Grønnedal Rare Earth Element Project in southwest Greenland, boosting the total resource from 89 million tonnes to 208 million tonnes at 0.72% Total Rare Earth Oxides (TREO). This 234% increase in tonnage comes alongside a 12% uplift in average grade, now standing at 0.72% TREO, reflecting not just more rock but better quality. Crucially, the company has established an initial 6 million tonnes Indicated Resource category, providing a higher-confidence foundation for advancing feasibility studies and future development planning.
The updated resource contains approximately 1.5 million tonnes of TREO, including 456,000 tonnes of praseodymium and neodymium oxides (Pr2O3+Nd2O3), which represent around 31% of the total TREO. These elements are critical for permanent magnet supply chains that underpin renewable energy technologies and advanced manufacturing, positioning Grønnedal as a strategically significant asset within Western critical minerals frameworks.
Drilling and Geological Modelling Drive the Upgrade
The resource expansion incorporates new data from Eclipse’s 2025 diamond and percussion drilling programs, supplemented by historic drillhole information. The drilling intersected consistent rare earth mineralisation, supporting a geological model of a large, near-vertical carbonatite intrusion extending to depths exceeding 900 metres. The mineralisation remains open along strike and at depth, indicating strong potential for further resource growth.
This drilling success builds on prior results, including broad high-grade zones exceeding 1% TREO from surface, which Eclipse reported earlier in April 2026, reinforcing the project's shallow-dipping higher-grade zones consistent with the resource model. The integration of these datasets and geological wireframes into a three-dimensional block model using Ordinary Kriging has allowed for a robust estimation of grades and tonnages, with no top cuts applied due to the homogenous mineralisation style. The resource remains unconstrained by economic pit shells, reported on a global basis within geological boundaries.
Feasibility Work and Strategic Positioning Underway
With the resource upgrade complete, Eclipse has initiated feasibility-related studies covering mine planning, metallurgical testing, environmental and social baseline assessments, and infrastructure evaluations. Preliminary metallurgical work suggests the REEs occur in readily liberated minerals amenable to conventional beneficiation and hydrometallurgical processing, though detailed recovery parameters remain under investigation.
Grønnedal’s location in Greenland offers logistical advantages, including proximity to an all-season deep-water port and alignment with European and North American critical minerals priorities. The jurisdiction’s political stability and supportive government stance enhance the project’s development prospects.
Next Steps Focus on Resource Conversion and Expansion
Eclipse plans further drilling in the 2026 Greenland field season to increase the Indicated Resource portion and test extensions to known mineralisation. This drilling will underpin feasibility-level mine planning and help convert more of the extensive inferred resource into higher-confidence categories, smoothing the pathway toward potential development.
The company’s Executive Chairman, Carl Popal, emphasised the significance of the upgrade: “The establishment of an Indicated Resource is a key milestone as we move from resource growth into feasibility work and development evaluation.” He highlighted Grønnedal’s scale, grade, and strategic relevance, noting its role in Western magnet-metal supply chains critical to the global energy transition.
As Eclipse advances technical studies and engages with strategic partners, the Grønnedal project stands out in the rare earth sector for its combination of size, quality, and jurisdictional advantages, offering a compelling platform for long-term value creation.
This resource upgrade follows Eclipse’s recent confirmation of extensive high-grade rare earth mineralisation at Grønnedal, where multiple drillholes intersected broad zones exceeding 6,000ppm TREO with strong neodymium and praseodymium profiles, reinforcing the deposit’s quality and continuity within the mineralised system broad mineralisation from surface. Meanwhile, ongoing metallurgical testing has demonstrated promising rare earth recoveries exceeding 90% in magnetic fractions, laying technical groundwork for processing optimisation Phase 1 metallurgical test results.
Bottom Line?
Eclipse’s doubling of the Grønnedal resource and first Indicated classification mark a transition from exploration to development, but metallurgical and economic studies remain critical to confirming the project’s viability.
Questions in the middle?
- How will ongoing metallurgical test results influence processing design and recovery assumptions?
- What are the timelines and milestones for feasibility study completion and permitting in Greenland?
- To what extent can further drilling convert the large inferred resource into higher-confidence categories?