Tanbreez at 70% BFS: Progress, Promises, and the Fine Print

Sep 3, 2025

3 minute read.

Highlights

  • Tanbreez is positioned as one of the world's largest hard-rock rare earth projects in Greenland, with potential geopolitical strategic importance.
  • The project's bankable feasibility study is 70% complete, with environmental baseline fieldwork finished and targeting Q4 2025 submission.
  • Western rare earth supply chains could benefit from a potential new heavy REE source outside Asia, with early U.S. interest already demonstrated.

Critical Metals Corp (CRML) says the Tanbreez Bankable Feasibility Study is ~70% complete, led by Danish firm NIRAS, with submission targeted for Q4 2025. Fieldwork for the 2025 environmental baseline is finished. The current scope spans mine design, processing, water/tailings (including a Lake Foster deposition plan), port/haul roads, and documentation for Greenland’s Mineral Licence and Safety Authority (MLSA).

Scale vs. Substance

Tanbreez is pitched as one of the world’s largest hard-rock REE projects, hosted in a kakortokite unit estimated at around 4.7 billion tonnes with ~27% HREO and very low U/Th (per company filings). But the defined resource to date covers only a slice of that envelope (industry coverage cites ~45 Mt), underscoring the basic truth: mineralized unit ≠ mineable inventory. Greenland has granted an exploitation licence MIN 2020-54 to Tanbreez Mining Greenland A/S—useful for regulatory clarity, not a verdict on project economics.

PR Gloss vs. Ground Truth

The milestone is real; the tone is aspirational. There are no BFS economics disclosed here—no capex/opex, product slate, or offtake detail. The completed baseline work is positive, but a Q4 BFS is not the same as project finance or FID—especially in Greenland, where environmental scrutiny and public consultation are exacting. Watch for metallurgy, tailings design acceptance, and a credible power/logistics plan to carry equal weight with headline tonnage.

Why ThisMatters to Supply Chains

If Tanbreez advances, Western buyers gain a potential heavy REE option outside Asia in a U.S./EU-aligned jurisdiction. Recent U.S. interest (e.g., an EXIM $120M letter of interest) and prior diplomatic attention around ownership highlight the project’s geopolitical profile. A successful BFS plus permitting would move Tanbreez from a talking point to a tangible HREE feedstock candidate for magnets and defense supply chains.

Our Read

Engineering and EIA groundwork under NIRAS adds credibility. Still, the project’s headline scale remains company-stated and should be discounted until BFS economics and permitting outcomes are public. For investors, the signal is clear: genuine momentum—yet the real de-risking arrives only when costs, metallurgy, permits, and financing line up.

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By Daniel

Inspired to launch Rare Earth Exchanges in part due to his lifelong passion for geology and mineralogy, and patriotism, to ensure America and free market economies develop their own rare earth and critical mineral supply chains.

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