Great discoveries always have the same effect: they illuminate a mountain and leave everything else in the shade. In the case of Vicuña, between the Argentine province of San Juan and the border with Chile, that remainder weighs heavily. Under the rock there are quantities of copper, gold and silver such as to bring Argentina back to the center of the global race for strategic metals, especially copper, but also gold; Above the rock remain high-altitude ecosystems, aquifers to be protected, roads to be built, power lines to be laid, communities asking for work and at the same time real guarantees.
The news travels quickly because the project is presented as one of the most significant mineral discoveries of recent decades and as one of the largest undeveloped districts in the world. The serious point, however, begins when you stop looking only at the numbers.
Vicuña reopens all questions on the territorial cost of extraction
The Vicuña joint venture, 50% owned by BHP and 50% by Lundin Mining, brings together the Filo del Sol and Josemaría projects in an Andean belt that is today considered strategic for the future of copper. In the technical update released by Lundin Mining on February 16, 2026, the group estimates 14 million tons of copper with a good level of reliability and another 32 million even more uncertain. For gold we are talking about 36 million ounces considered reliable and another 61 million only estimated; for silver, 729 million ounces considered solid and 1.051 billion which still remain to be better confirmed.
Already in 2025, however, corporate communication had placed the district on an exceptional scale: over 13 million tons of copper estimated with greater reliability and another 25 million more uncertain, together with tens of millions of ounces of gold and silver. This is also how formulas such as “discovery that can change the markets” quickly found space in corporate communications and the business press.
For Argentina the symbolic value is even clearer than the geological value. The country exports gold, silver and lithium, but has not produced copper since 2018, when Alumbrera closed. The government sees the new copper season as a lever to bring back currency, investments and international weight in a sector considered decisive for the coming years. Reuters recalled that official estimates indicate, by adding the eight main copper projects in the pipeline, a potential copper export of up to 5.2 billion dollars a year by 2030, within an overall value of mining exports that could reach 15.4 billion. In this context, Vicuña weighs as an accelerator, because it can help bring Argentina back among the major copper producers by the end of the decade.
Copper explains much of the enthusiasm, as it remains central to power grids, renewable plants, electric vehicles, electronics and manufacturing. Gold and silver broaden the economic perimeter even further: they are inside jewelry, inside semiconductors, inside medical equipment and applications that require conductivity and durability. From here comes the global reflection of the discovery: Argentina stops appearing only as an agricultural power and returns to being read as it returns to being read as a mining territory of growing strategic importance, in direct dialogue with Andean giants such as Chile and Peru.
The euphoria of the markets stops short of geography
Mining in the high mountains always starts with logistics. Reuters wrote that the project will need a road of about 220 kilometers to reach operations at 4,200 meters above sea level, as well as a high-voltage power line comparable in scale to that needed for a large city. This means construction sites, earthmoving, drainage, containment works and a physical infrastructure that changes the landscape well before production begins. When talking about the energy transition, this part of the story is often pushed to the bottom of the page. In reality it is his most concrete body.
The most sensitive environmental issue remains water. In the Andean areas, water is an industrial resource, a common good and a factor of ecological stability in the same sentence. Vicuña announced a few days ago the approval of the first and second updates of Josemaría’s environmental impact report, with an extension of the project’s useful life from 19 to 25 years, an increase in treatment capacity to 175 thousand tons per day and a multi-source water plan that, according to the company, would allow for the recovery of approximately 73% of the process water.
These are important data, because they show that the issue is already at the center of the project. However, all the questions that really matter remain: where will the water come from, how much pressure will end up on the local aquifers, which independent controls will follow the entire operating cycle, how long will the altitude ecosystems hold up in the face of a plant of this scale.
Alongside water comes tailings, waste management, soil stability and the risk of spills or contamination. Large operators talk about advanced treatment systems, real-time monitoring and safer disposal methods. Global mining history teaches how this part cannot be treated as a simple technical attachment.
An error in the management of waste or process water is enough to transform a district celebrated as an economic engine into a case of lasting ecological damage. For this reason, environmentalists and local organizations are observing the project with increasing surveillance, especially at a time when Argentina is discussing a reform of the law on glaciers which, according to critics, weakens the protection of high-altitude water reserves: the Senate approved it on February 26, 2026 and the text has yet to pass the House.
Local communities are demanding better jobs, schools, services and roads
Every large deposit brings with it a social promise: jobs, activities for local suppliers, infrastructure, services, technical training. Vicuña insists a lot on this axis and in his communications he talks about new opportunities for employment, local businesses and regional economic development. The project has already initiated pathways with local suppliers and initiatives with the National University of San Juan, while economic observers see margins for construction, transportation, hospitality, maintenance, engineering and support services. For remote areas of western Argentina this prospect matters, because a mine of this scale can change the fabric of everyday life long before the actual extraction.
Within the same scenario, however, local communities, territorial organizations and populations of the area are moving and asking for open consultations, respect for ancestral lands, transparency on environmental data and protection of economies that revolve around agriculture and tourism. Argentina, like other Andean countries, knows this tension well: the mine arrives with capital, technology and expectations, while the territory responds with questions about water, soil, productive identity and the real duration of the benefits. Royalties and tax incentives thus enter a broader game, where the question is not just how much metal will come out of the mountain, but how much public wealth will actually remain in the areas that bear the most direct impact.
In the end, the heart of the story is all here. The Vicuña district can redesign Argentina’s mining profile, move capital, increase future copper supply and strengthen a supply chain that markets consider decisive. Meanwhile, it also forces us to face a less comfortable truth: the metals of the transition emerge from fragile landscapes, require water, infrastructures and invasive works, and ask for more robust rules at the very moment in which part of politics is trying to loosen environmental constraints. The discovery is huge. The bill, as often happens in the mountains, is better seen after the initial enthusiasm.
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