Argentina’s US$40 billion copper boom depends on glacier law reform

The Senate’s approval of a glacier law overhaul has boosted hopes for major copper investments from companies including BHP, Lundin and Glencore, but the reform still faces a final vote and strong environmental opposition.

Argentina may be on the verge of unlocking one of the largest mining investment waves in its history. The recent approval in the Senate of a reform to the country’s glacier protection law has revived expectations for a copper investment cycle estimated at around US$40 billion, driven by global miners seeking to advance projects that have long been constrained by environmental rules in the Andes.

The bill, promoted by President Javier Milei’s government, was approved by the Senate on February 26, 2026, by a 40–31 vote. It now moves to the lower house for a final debate and vote.

Reform aims to unlock large-scale copper projects

The government and the mining industry argue that the current glacier law creates legal uncertainty and blocks investment in high-altitude projects. In particular, miners say the law needs clearer definitions around periglacial areas—mountain formations that may include ice, frozen ground and rock debris—because current classifications can prevent project development.

If enacted, the reform would allow Argentina’s provinces to set their own standards for protecting glaciers and periglacial environments, rather than relying solely on the current federal framework.

Vicuña and El Pachón are among the most closely watched projects

One of the most important projects tied to the debate is Vicuña, the copper district combining Josemaría and Filo del Sol, controlled by BHP and Lundin Mining. Bloomberg reported that the two companies plan to invest around US$18 billion to develop the project, which could become one of the world’s largest copper mines.

The article also notes that a glacier near Filo del Sol could become a key regulatory obstacle under the current law, making the reform particularly important for the project’s long-term development path.

Another major project often linked to the glacier law debate is El Pachón, where Glencore also faces regulatory complications related to protected glacial formations in the project area.

Milei sees copper as part of a broader economic strategy

For Milei, advancing these projects is not only about mining policy. Bloomberg reported that his administration wants to show before the 2027 presidential election that its pro-market reforms can generate foreign investment, jobs and export growth. The same report said that, at current copper prices, these projects could eventually generate more than US$10 billion per year in revenue and help lift Argentina into the world’s top 10 copper producers.

The reform also aligns with Milei’s broader effort to encourage mining through the RIGI investment incentive regime, which offers tax and trade benefits designed to improve project economics and reduce political risk.

Environmental groups warn of weaker water protection

Environmental organizations strongly oppose the reform, arguing that it would weaken one of Argentina’s most important protections for freshwater reserves. The current 2010 glacier law protects glaciers and periglacial areas because of their role in supplying water to downstream communities, farms and ecosystems.

Critics say shifting authority to provincial governments could lead to a progressive weakening of national safeguards in favor of mining development. Reuters reported that environmental groups, including Greenpeace Argentina, warned the reform could worsen water scarcity and put strategic water resources at risk.

Lower house vote will be decisive

Despite Senate approval, the bill still faces a critical stage in the lower house, where Milei’s coalition does not have a majority. The outcome of that vote will determine whether Argentina can move ahead with a new copper investment cycle or whether large projects will remain delayed by regulatory uncertainty, environmental opposition and unresolved legal restrictions.

What is now at stake is larger than a single law: for the mining sector, it is the possibility of opening the door to a historic wave of copper development; for opponents, it is a defining test of how far Argentina is willing to relax glacier and water protections in the name of economic growth.