Chinese firm keeps Canada’s only antimony mine idle, raising supply chain concerns

Canada’s only primary antimony mine, the Beaver Brook operation in Newfoundland and Labrador, has remained idle despite rising demand for the strategic metal, highlighting growing concerns over Western dependence on foreign-controlled critical mineral supply chains.

The Beaver Brook mine, located about 45 km southwest of the town of Glenwood, is currently owned by China Minmetals, a Chinese state-owned mining group. Originally acquired in 2009 by Hunan Nonferrous Metals Corp. for $29.5 million, the mine has been under Minmetals’ control for the past 15 years.

Antimony is considered a strategic critical mineral due to its use in flame retardants, lead-acid batteries, semiconductors, and a range of defense technologies including ammunition, infrared sensors and night-vision equipment.

Operations halted despite strategic value

Beaver Brook first began producing antimony concentrate in 2012 but suspended operations the following year amid weak market conditions. The mine briefly restarted in 2019 before shutting down again in 2023.

At full capacity, the project has the potential to produce roughly 6,000 tonnes of antimony concentrate annually, which analysts say could account for about 5% of global supply.

The shutdown came just as countries in North America and Europe began to wake up to the idea of establishing a secure, diversified supply of minerals like antimony under the current geopolitical environment.

China, the main US economic rival, currently dominates the global antimony supply chain, controlling the majority of the mining, refining and processing capacity. In 2024, Beijing began restricting its exports of the mineral, leading to a sharp rise in global antimony prices and exposing the market’s overreliance on one source.

Strategic mineral under the spotlight

The situation has attracted attention from policymakers and industry observers who say the dormant Canadian mine underscores the West’s vulnerability in critical minerals, as highlighted by investigative journalist Sam Cooper.

The Northern Miner president Anthony Vaccaro, during a 2025 presentation cited in Cooper’s report, noted that there has been industry chatter in Canadian mining and political circles about Beijing’s possible strategic intentions for the asset.

“I will tell you, there’s rumors that the Chinese use this — that Beaver Brook is on care and maintenance, but if the price of antimony stays high and other projects come on, they can turn the tap on, flood the market a little bit, drive the price back down, discourage others from entering,” he said.

While Canada has pushed to reduce Chinese involvement in parts of its mining sector — ordering Chinese companies in 2022 to divest from several Canadian lithium exploration firms on national security grounds — the Chinese ownership of Beaver Brook has remained unchanged.

The threat of Beijing “manipulating” the global antimony market highlights just one of many complex challenges facing Western governments as they attempt to build resilient supply chains while balancing investment flows and geopolitical considerations.

Critical minerals race intensifies

Demand for antimony is expected to increase as Western governments accelerate spending on defense, electronics and energy infrastructure. The US, Canada and their allies have all launched initiatives to rebuild domestic critical mineral production and processing capacity, aiming to reduce dependence on Chinese supply chains.

In the US, Washington has begun channeling funding toward domestic producers and projects that could supply antimony and other strategic metals. Companies such as United States Antimony (NYSE: UAMY), which operates processing facilities in Montana and Mexico, and Perpetua Resources (NASDAQ: PPTA), developer of the Stibnite project in Idaho, have attracted millions in funding support as part of efforts to rebuild a secure domestic supply of the metal.

Industry analysts say projects such as Beaver Brook could become increasingly important as countries look to secure reliable sources of strategic metals.

For now, however, Canada’s only antimony mine remains on care and maintenance, leaving the country without domestic production of the metal.