US, Denmark and Greenland to Sign an Arctic Security Deal That Gives Washington a Say Over Greenland's Critical Minerals

What happened

The United States, Denmark and Greenland are set to sign an Arctic security agreement this week on the sidelines of the United Nations General Assembly in New York, expanding the US military footprint on Greenland while granting Washington new authority over who can invest in the island's critical-minerals sector. The deal builds on the existing Pituffik Space Base in northwestern Greenland, which already supports US missile-warning, missile-defense and space-surveillance operations, and folds Arctic security into the broader NATO framework, according to Danish officials. Under the agreement, President Trump said "no US adversary can EVER have a base in Greenland, have a military presence in Greenland, or make sensitive investments in Greenland" without Washington's written approval -- a provision reported to explicitly cover critical-minerals investment alongside military basing and undersea-cable infrastructure. Danish Prime Minister Mette Frederiksen has stressed the arrangement "recognizes the Kingdom's sovereignty and Greenlandic self-determination," and Danish officials say it does not transfer mining rights or sovereignty to the US.

The minerals angle matters because Greenland ranks eighth globally for rare-earth reserves, according to the Center for Strategic and International Studies, with roughly 1.5 million tonnes, and its Kvanefjeld deposit alone is estimated to hold about 1 billion tonnes of ore grading 1.1% total rare-earth oxides, one of the largest known deposits outside China. Only two mines currently operate on the island, neither producing rare earths, though that is starting to change: Critical Metals Corp, which holds 92.5% ownership of the Tanbreez rare-earth project in southern Greenland, has begun construction of pilot-plant and multi-use facilities there, targeted for readiness around May 2026. Amaroq Minerals, operator of Greenland's producing Nalunaq gold mine, has separately confirmed high-grade rare-earth results of 2.31% total rare-earth oxide at its Ilua project in South Greenland. Arctic mining still faces year-round climate constraints, a near-total absence of export infrastructure such as ports, power and roads, and organized local opposition to past mining proposals.

The details

The headline framing of this deal is military, an expanded US footprint, NATO-aligned Arctic security, but the clause doing the most economic work is the investment-screening provision, because it is the first concrete mechanism giving Washington a formal veto over who gets to fund Greenland's mining sector. That matters specifically because Greenland's rare-earth story has, until now, been a resource story without a gatekeeper: enormous deposits like Kvanefjeld have sat largely untouched for decades, not because no one wanted them, but because no government held the leverage to decide whose capital could develop them. By requiring US written approval before "sensitive investments," language reported to explicitly include critical minerals, Washington is positioning itself to block Chinese capital from Greenland's rare-earth sector the same way it has tried to limit Chinese involvement in rare-earth projects elsewhere over the past two years.

What the deal does not do is solve any of the reasons Greenland still has only two operating mines. Arctic mining remains seasonal and expensive; the island lacks the ports, power grids and roads a large-scale rare-earth operation would need; and communities that have opposed past mining projects have not gone away because Washington and Copenhagen signed a security pact. Critical Metals Corp's pilot-plant construction at Tanbreez is the clearest sign that capital is already moving regardless of this week's agreement, which suggests the deal's real function is to shape who is allowed to follow that capital in, not to create the underlying economic case from scratch. An investment-screening mechanism can determine who gets to try to build a mine; it cannot by itself make Kvanefjeld or Ilua commercially viable faster than the underlying infrastructure and financing allow. The realistic reading is that this agreement removes one layer of geopolitical uncertainty for Western capital while leaving the harder physical problems exactly where they were.

Why it matters

This site has tracked India's own parallel push to build critical-minerals supply lines outside China: new lithium blocks in Argentina, private miners moving into Indonesia and the Democratic Republic of Congo, and a dedicated critical-minerals postgraduate program at IIT-ISM. The Greenland deal is the same competitive dynamic playing out at a US-allied-government level rather than a private-investment level, with Washington using a security agreement to pre-empt Chinese access to a rare-earth-rich territory. If Western nations succeed in steering Arctic critical-minerals development away from Chinese capital over the next decade, it adds one more non-Chinese supply source to a global rare-earth market India's EV and electronics manufacturers currently depend on almost entirely through Chinese-processed material, though on Greenland's current mining timeline, any actual tonnage remains a long-term prospect rather than a near-term supply change.