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Tanbreez Drilling Yields 0.35%–0.77% TREO+Y with 25% Heavy Rare Earths

Mining By Maxwell Dee 3 min read

Critical Metals Corp reports robust 2025 drilling results at the Tanbreez Rare Earths Project, confirming consistent high-grade rare earth mineralisation with strategic metals. These findings underpin plans for resource growth and mine development.

  • Total Rare Earth Oxide grades between 0.35% and 0.77% TREO+Y
  • Heavy rare earth oxides comprise approximately 25–29% of total rare earth oxides
  • Strategic metals detected include gallium, hafnium, cerium, yttrium, zirconium, niobium, and tantalum
  • Mineralisation remains open along strike and at depth, indicating potential for resource expansion
  • Results to support revised Mineral Resource Estimate and advance mine planning

Strong Rare Earths Results from Greenland

Critical Metals Corp has announced compelling assay results from its 2025 drilling campaign at the Tanbreez Rare Earths Project in southern Greenland. The drilling program, aimed at extending known mineralisation and refining geological models, has delivered consistent grades of rare earth oxides, reinforcing the project's status as a significant global rare earth deposit.

The assays reveal Total Rare Earth Oxide plus Yttrium (TREO+Y) grades ranging from 0.35% to 0.77%, with a noteworthy heavy rare earth oxide (HREO) component making up roughly 25–29% of the total. This heavy rare earth fraction is particularly valuable given its critical role in advanced technologies and clean energy applications.

Strategic Metals and Multi-Commodity Potential

Beyond rare earths, the drilling results highlight the presence of several strategic metals including gallium, hafnium, cerium, yttrium, zirconium, niobium, and tantalum. These elements enhance the project's multi-commodity appeal, potentially broadening its economic base and appeal to investors focused on critical minerals essential for electrification and next-generation technologies.

The mineralisation occurs within a layered kakortokite host rock, showing strong lateral and vertical continuity. Importantly, the mineralised zones remain open both along strike and at depth, suggesting significant potential for resource expansion as further drilling continues.

Advancing Towards Resource Upgrade and Mine Planning

The 2025 drilling results are expected to feed into a revised Mineral Resource Estimate, which will provide a more comprehensive understanding of the deposit's scale and grade distribution. This update is a critical step towards advancing mine planning studies, including pit optimisation and development strategies.

Critical Metals’ Executive Chairman, Tony Sage, expressed optimism about the results, highlighting the consistent rare earth mineralisation extending from the Fjord Deposit into the Upper Fjord area. The company’s external consultants are currently validating the data, with further assay results pending from the 2025 field season.

Looking Ahead

With the drilling program successfully completed and promising results in hand, Critical Metals is poised to incorporate these findings into its 2026 exploration plans. The company is also planning additional drilling in newly identified target areas, such as Area B, to further delineate mineralisation and support resource growth.

The Tanbreez project’s strategic location in Greenland, with year-round shipping access, combined with its multi-commodity potential, positions Critical Metals as a key player in the supply of critical minerals for the clean energy transition and advanced technologies in Europe and beyond.

Bottom Line?

As Critical Metals awaits remaining assay results, the Tanbreez project’s evolving resource profile could reshape rare earth supply dynamics.

Questions in the middle?

  • How will the upcoming revised Mineral Resource Estimate impact the project’s valuation?
  • What are the timelines and capital requirements for advancing from exploration to production?
  • How might fluctuations in rare earth and strategic metal markets influence project economics?