Critical Minerals, Critical Alliances: The Cook Islands–US Strategic Compact
The Cook Islands has signed a critical minerals framework with the United States, joining Washington's global push to break China's dominance over rare earths. Prime Minister Mark Brown says it gives Rarotonga options. The geopolitics suggest it may also narrow them.
Rarotonga signs a framework with Washington on critical minerals. The deal preserves sovereignty on paper. The geopolitics are more complicated.
On February 4, at the US State Department in Washington, an assistant to the Cook Islands Prime Minister sat across from his American counterpart and signed a non-binding Framework for Engagement and Cooperation on critical minerals and rare earths. The Cook Islands — population 15,000, land area 237 square kilometres, exclusive economic zone nearly two million square kilometres — had just entered the most consequential geopolitical arena of the decade: the global contest for the minerals that power the twenty-first century economy.
The signing took place on the margins of the 2026 Critical Minerals Ministerial, a first-of-its-kind gathering convened by Secretary of State Marco Rubio and attended by representatives of 54 countries and the European Commission. Vice President JD Vance used the event to unveil the administration’s vision for a critical minerals trading bloc — a preferential trade zone with guaranteed floor prices, designed to counter China’s dominance over mineral refining and supply chains. The Cook Islands was one of eleven nations to sign bilateral frameworks with Washington that day. In the company of Argentina, the Philippines, Morocco, and the UAE, Rarotonga joined a coalition whose unifying principle is the strategic reorganisation of global mineral supply.
For the Cook Islands, the framework is the product of years of careful positioning. The country’s Seabed Minerals Authority has built what is widely regarded as one of the Pacific’s most rigorous regulatory regimes for ocean-floor resources. Decades of scientific assessment, geological mapping, and environmental baseline work have established Rarotonga as a jurisdiction that takes seabed governance seriously. Prime Minister Mark Brown has been explicit that any development must occur on Cook Islands terms, under Cook Islands law, and in a way that delivers long-term value for Cook Islanders.
The Cook Islands government has also been unusually explicit about what the framework does not do. It is not a mining licence. It does not guarantee funding, investment, or offtake agreements. It does not override environmental or regulatory law. It does not commit the country to extraction or production timelines. It is, in Brown’s careful phrasing, a platform that “gives the Cook Islands options.” The emphasis on optionality is deliberate. In a geopolitical environment where great powers are competing to lock small states into exclusive partnerships, preserving the ability to choose is itself a strategic asset.
The framework establishes a US–Cook Islands Working Group to coordinate engagement, share expertise, and identify areas of mutual interest. It promotes joint research and geological mapping, encourages responsible investment aligned with high environmental and governance standards, and supports the development of diversified supply chains. Read in isolation, these provisions are unobjectionable. Read in the context of the Trump administration’s broader critical minerals strategy, they acquire a different charge.
That strategy is aggressive and comprehensive. Project Vault, a twelve-billion-dollar initiative to build a US critical minerals reserve, is stockpiling the elements essential to defence, energy, and advanced manufacturing. The FORGE initiative, successor to the Minerals Security Partnership, is assembling a coalition of aligned nations to create alternative supply chains that bypass Chinese refining capacity. The administration has signed or negotiated mineral frameworks with more than thirty countries in the past year. Floor prices, tariff walls, and demand consolidation are the tools. Reducing Chinese leverage over critical mineral supply is the objective.
The Cook Islands’ place in this architecture is determined by geography and geology. Its exclusive economic zone contains significant deposits of polymetallic nodules rich in cobalt, manganese, and rare earths. For Washington, Rarotonga represents a potential node in a diversified supply chain — a friendly, well-regulated jurisdiction in the Pacific with known mineral endowments. For the Cook Islands, Washington represents access to capital, technology, and markets that no Pacific nation can generate domestically.
The tension lies in asymmetry. The United States brings market depth, investment capacity, and military presence to the relationship. The Cook Islands brings regulatory expertise, environmental stewardship, and sovereign access to a resource base that the world’s largest economy has declared a national security priority. In classical alliance theory, this is a patron-client dynamic that tends to favour the larger partner over time, regardless of the formal language of the agreement. Brown’s emphasis on sovereignty is a hedge against this tendency — a rhetorical and legal guardrail designed to prevent optionality from becoming dependency.
Other Pacific nations are watching closely. If the Cook Islands framework produces tangible benefits — investment, technology transfer, revenue — without compromising sovereign decision-making, it could become a model for how small Pacific states engage with the critical minerals economy. If it becomes the thin end of a wedge that draws Rarotonga deeper into Washington’s extractive orbit, it will serve as a cautionary tale. The distinction between these two outcomes may come down to implementation details that are still being negotiated behind closed doors.
What is not in dispute is that the critical minerals contest has arrived in the Pacific with force. The Cook Islands, by virtue of its regulatory foresight and geological endowment, finds itself at the centre of a global struggle it did not create but cannot avoid. Brown’s task is to ensure that his country emerges from this struggle with more options than it had going in, not fewer. It is a task that will require diplomatic skill of the highest order — and the willingness to say no, even when the offers are generous.