Greenland’s Tanbreez Mine Gets Approval, Shifting Rare Earth Supply Dynamics

On October 5, 2026, Critical Metals Corp. (CRML) announced formal government approval for its Tanbreez mining plan in Greenland, valid through 2050. This decision immediately sent CRML shares up 13% on the news. The approval followed weeks of market chatter around critical mineral supply, capped by Mizuho Securities upgrading Albemarle (ALB) to Buy on October 14, citing surging energy storage demand. The Greenland approval is a concrete step toward diversifying the rare earth supply, a sector long dominated by a single geopolitical actor. This shift has implications for every company working to feed the battery and energy storage supply chain.

The Mechanism of Rare Earth Supply

Rare earth elements, or REEs, are not inherently rare in the earth's crust. Their scarcity lies in their economic extractability and, more critically, in the complex process of separating them into individual oxides. REEs occur together in mineral deposits, often within a single ore body. The challenge is that their chemical properties are very similar, making traditional separation techniques like flotation or magnetic separation insufficient. The industry relies on solvent extraction, a multi-stage chemical process where REE-bearing solutions are repeatedly mixed with organic solvents. Each stage precisely targets and separates one element from the mixture based on subtle differences in solubility. This process is energy-intensive, requires significant capital investment, and generates considerable waste. The bottleneck is not just finding the ore, but building the infrastructure and expertise to perform this chemical separation at scale, economically, and with environmental responsibility. Without this complex processing, a rare earth deposit, no matter how large, remains just rock.

Companies in the Critical Minerals Sector

The market for critical minerals is seeing activity across the board, from lithium brine projects to hard rock rare earth mines. In lithium, Standard Lithium Ltd. (SLI) announced Ralph Alexander’s appointment to its board on October 13, a move that could strengthen governance as its Arkansas brine project progresses. Atlas Lithium Corporation (ATLX) is advancing pre-assembly steps for its processing plant, as reported on October 6, indicating movement toward production readiness for its hard rock lithium assets. Ioneer Ltd. (IONR) is moving its Nevada tungsten project toward drilling, with six holes and 3,050 feet planned, as announced on October 13. While tungsten is not a battery metal, it is a critical mineral. In the rare earth space, Critical Metals Corp. (CRML) secured its Tanbreez mining approval on October 5. This project, located in southern Greenland, is notable for its substantial heavy rare earth content. MP Materials (MP) at Mountain Pass, California, remains a key domestic rare earth producer, though its stock slipped 2% on October 14. USA Rare Earth, Inc. (USAR) continues to work on its Round Top project in Texas, which holds a diverse suite of critical minerals including heavy and light rare earths, lithium, and other high-tech metals. NioCorp Developments Ltd. (NB) is developing its Elk Creek project in Nebraska, focused on niobium, scandium, and titanium, with potential for rare earth byproducts. American Battery Technology Company (ABAT) is focused on lithium-ion battery recycling and primary lithium hydroxide manufacturing, offering a different approach to supply chain security.

American Lithium Minerals, Inc.

American Lithium Minerals, Inc. (AMLM) operates as an exploration-stage company, trading over the counter. Its stated focus lies in lithium and boron properties within Nevada. The company was incorporated in Nevada on March 10, 2005. Its primary project is the Sarcobatus Lithium property, which encompasses 1,780 acres of mining claims in Central Nevada. This property is the stated focus of AMLM's lithium exploration activities, which have been ongoing since 2009. The company has also acquired and divested cobalt, nickel, and graphite prospects in Central Nevada, and rare earth elements projects in Kingman, Arizona, and Southeast Illinois. AMLM’s most recent substantive filing was a Regulation A offering qualified by the SEC on February 4, 2026. This offering covers up to 80,000,000 units, with each unit comprising one share of common stock and a warrant to purchase 1.5 shares of common stock. The warrants are exercisable at $0.05 per share until December 31, 2028, potentially leading to the issuance of an additional 120,000,000 shares if fully exercised. The maximum total offering amount is $20,000,000. The company states its intention to expand its exploration and acquisition for mineral properties worldwide. It also highlights a strategy to develop Real World Asset Tokens to provide capital for mining. While the company has outlined its exploration focus and capital-raising strategy, the public record does not yet establish a measured or indicated resource estimate for its Sarcobatus Lithium property. AMLM's business plan includes the potential for asset acquisition as part of its growth strategy, stating that a material amount of proceeds could be used for such acquisitions. The company has not generated significant revenues to date and its ability to do so depends on executing its business plan and expanding its client base.

What to watch

Investors should monitor several concrete developments. For Critical Metals Corp. (CRML), the focus shifts to the implementation of the Tanbreez mining plan in Greenland following its October 5 approval. Specific dates for initial operational phases or infrastructure development will be key. For Standard Lithium Ltd. (SLI), watch for updates on its Arkansas brine project, particularly any progress on pilot plant operations or definitive feasibility study announcements. Atlas Lithium Corporation (ATLX) investors should look for further details on the pre-assembly steps for its processing plant, including timelines for completion and commissioning. For American Lithium Minerals, Inc. (AMLM), watch for any announcements regarding exploration results from its Sarcobatus Lithium property or specific details on its Real World Asset Token initiatives. Regulatory filings, particularly any updates to its Regulation A offering status or further exploration reports, will provide concrete information., { "label": "Concentrate", "note": "Initial processing to increase REE content." }, { "label": "Separate Oxides", "note": "Complex chemical process to isolate individual rare earth oxides.", "metric": "Energy-intensive" }, { "label": "Refine", "note": "Further purification for specific applications." }, { "label": "Market", "note": "Sale to manufacturers for magnets, batteries, catalysts." } ], "highlight": 2, "highlight_note": "Solvent extraction for individual rare earth oxides is the primary bottleneck.", "footnote": "Source: PubCo Insight analysis of industry data and company filings." }