French Polynesia Challenges United States Over Deep Sea Mining Proposal in Pacific International Waters

The government of French Polynesia has formally announced its intention to challenge a proposal by a California-based startup to explore the seabed for mineral extraction in international waters situated just outside its maritime borders. The move sets the stage for a significant diplomatic and environmental confrontation between the Pacific territory and the United States, highlighting the growing global tension over the "blue economy" and the race for critical minerals. President Moetai Brotherson expressed deep concern over the lack of diplomatic transparency, stating that while the territory was approached via email, it was never meaningfully consulted regarding industrial activities proposed in ecosystems adjacent to protected Polynesian waters.

The controversy centers on a permit application submitted by American Deep Sea Minerals, a Bay Area-backed firm, to the U.S. National Oceanic and Atmospheric Administration (NOAA). The company is seeking authorization to explore a specific region of the high seas known as Eastern High Seas Pocket 3. This area is unique because it is entirely surrounded by the Exclusive Economic Zones (EEZs) of the Cook Islands, Kiribati, and French Polynesia. The company intends to identify and eventually extract polymetallic nodules—potato-sized rocks rich in cobalt, nickel, copper, and manganese—which are considered essential for the production of electric vehicle batteries and advanced military technologies.

The Geopolitical Context of Seabed Exploration

The application comes at a time when the United States is aggressively seeking to secure domestic and friendly-sourced supplies of critical minerals. Under the current administration, there has been a concerted effort to position the U.S. as a leader in the nascent deep-sea mining industry to reduce reliance on foreign supply chains, particularly those dominated by China. American Deep Sea Minerals is one of at least a dozen companies currently navigating the U.S. regulatory process for deep-sea exploration licenses.

However, the U.S. approach has drawn sharp criticism from the international community. Most nations conduct seabed mining activities under the jurisdiction of the International Seabed Authority (ISA), a United Nations-mandated body based in Jamaica. The ISA is currently in the final stages of drafting a "Mining Code," a comprehensive regulatory framework intended to govern the extraction of minerals in the "Area"—the seabed beyond national jurisdiction. Because the United States has not ratified the United Nations Convention on the Law of the Sea (UNCLOS), it is not a member of the ISA. Instead, the U.S. government has invited companies to apply for permits directly through domestic agencies like NOAA, a move that critics argue flouts international law and the principle that the deep seabed is the "common heritage of mankind."

French Polynesia’s Domestic and International Stand

For French Polynesia, the issue is not merely one of legal technicality but of environmental survival and cultural sovereignty. In 2022, the territory implemented a comprehensive ban on seabed mining within its own waters, a move that was followed by the French national government in 2023. These bans reflect a growing consensus in the Pacific that the potential ecological risks of deep-sea mining—including sediment plumes, noise pollution, and the destruction of unexplored habitats—far outweigh the economic benefits.

President Brotherson has emphasized that French Polynesia’s stance is firmly rooted in its domestic regulatory framework. The territory manages Tainui Atea, one of the world’s largest marine protected areas, which covers nearly 5 million square kilometers. According to United Nations data, this vast expanse of ocean sustains 21 species of sharks, 176 species of coral, and over 1,000 species of fish. Brotherson argues that allowing industrial mining just outside the borders of this sanctuary would inevitably lead to cross-border environmental degradation, threatening the fisheries and biodiversity that the territory has worked to protect.

Furthermore, French Polynesia’s position is complicated by its status as an overseas collectivity of France. Because it lacks full political self-determination, it does not have an independent seat at the ISA. In the past, Indigenous voices from the territory were largely excluded from high-level negotiations. Recently, however, environmental non-profits have begun facilitating observer status for Indigenous advocates, allowing leaders like Brotherson to voice their concerns on the global stage.

Chronology of the Dispute and Regulatory Milestones

The current friction is the result of several years of escalating activity in the deep-sea mining sector:

• 2022: French Polynesia officially bans seabed mining within its EEZ, citing the need for the "precautionary principle."
• January 2023: The French National Assembly votes overwhelmingly to support a total ban on deep-sea mining in international waters, positioning France as a leading global opponent of the industry.
• Mid-2023: The U.S. government encourages domestic firms to apply for exploration licenses under the Deep Seabed Hard Mineral Resources Act (DSHMRA), bypassing the ISA’s ongoing negotiations.
• January 2024: The United Nations High Seas Treaty, also known as the Biodiversity Beyond National Jurisdiction (BBNJ) treaty, takes effect. This treaty allows nations to propose marine protected areas in international waters.
• June 2024: NOAA publishes a notice of receipt for American Deep Sea Minerals’ application, opening a public comment period that runs until August 3, 2026.
• July 2024: During ISA meetings in Jamaica, Secretary-General Letitia Carvalho warns that the deep seabed "belongs to all of us" and warns against unilateral actions by individual nations.

Environmental and Cultural Concerns

The proposed mining site, Eastern High Seas Pocket 3, is a critical corridor for migratory species, particularly tuna. Fisheries represent a vital pillar of the French Polynesian economy and food security. Scientific studies have suggested that the sediment plumes created by mining robots could travel hundreds of kilometers, potentially clogging the gills of fish and disrupting the delicate balance of the "twilight zone," where many marine species feed.

Beyond the biological impact, there is a profound cultural dimension to the opposition. Indigenous Polynesians, who make up 80 percent of the territory’s population, maintain a deep spiritual connection to the ocean. Hinano Murphy, an Indigenous cultural expert, has described the ocean floor as a "sacred place of creation." The practice of traditional navigation and the ancestral belief systems of the Pasifika people view the deep sea as a realm that should remain undisturbed.

Under international law, Indigenous peoples have the right to Free, Prior, and Informed Consent (FPIC) regarding projects that affect their ancestral territories or resources. President Brotherson contends that American Deep Sea Minerals failed to adhere to this principle. While the company’s CEO, Graham Goulet, stated that they intend to consult with the governments of the Cook Islands, Kiribati, and French Polynesia "as the exploration program develops," Brotherson argues that consultation must happen before an application is processed, not as an afterthought.

Analysis of Implications and Future Outlook

The challenge from French Polynesia highlights a broader rift in international ocean governance. If the U.S. proceeds with granting licenses unilaterally, it could trigger a "race to the bottom" where countries compete to claim seabed resources without standardized environmental safeguards. This would undermine the authority of the ISA and potentially lead to legal challenges at the International Tribunal for the Law of the Sea.

Conversely, French Polynesia is looking toward the newly enacted UN High Seas Treaty as a potential solution. By proposing that Eastern High Seas Pocket 3 be designated as a conservation area under the BBNJ treaty, the territory could effectively block mining activities through an internationally recognized legal mechanism. This would set a major precedent for how the treaty is used to protect high-seas biodiversity from industrial exploitation.

The outcome of American Deep Sea Minerals’ application will also serve as a litmus test for U.S. environmental policy. While the government is eager to secure minerals for the "green transition," it faces increasing pressure to honor international environmental commitments and respect the sovereignty of Pacific Island nations. The National Oceanic and Atmospheric Administration must now weigh the strategic benefits of mineral exploration against the documented risks to marine ecosystems and the vocal opposition of regional stakeholders.

As the August 3 deadline for public comment approaches, the international community is watching closely. The dispute over a small pocket of the Pacific Ocean has become a microcosm of the global struggle to balance industrial ambition with the preservation of the planet’s last great wilderness. For President Brotherson and the people of French Polynesia, the fight is about ensuring that the "injustices and destruction" seen on land are not replicated on the ocean floor. Regardless of the technical merits of the mining proposal, the lack of meaningful engagement with the people most affected by it remains the primary hurdle for the industry’s future in the Pacific.