01 THE SETUP

Three copper companies set out growth plans in the past week:

Of these, only Copper World is a new final investment decision. The other components range from an expansion sanctioned in August 2025 to studies still waiting on drilling results.

02 WHY IT MATTERS

With grades falling at existing mines and demand forecasts rising, the industry’s supply response has to be measured in mined tonnes. So while this week’s headline capital commitments are large — potentially totaling over $10bn — they’re a weak proxy for the mined tonnes. Part of this week’s spending sustains current output, part expands processing rather than mining, and resource additions can extend a mine’s life without lifting its annual production.

Sorting the announcements by what they would actually add says more about where the next tonnes will come from than their combined dollar value does.

03 THE DECODE

This past week’s announcements point to a supply response built largely on known geology: expansions at operating mines and the development of deposits that have already been discovered and defined.

That has two implications.

First, Brownfield capacity is being added at mines whose base output is under pressure from declining grades, so part of it replaces lost production.

Second, the greenfield projects now advancing are drawn from a backlog of past discoveries, which means this phase of mine development depends more on converting that backlog than on new exploration success.

Sorted by route, the week’s components look like this [Note: Figures are company estimates of contained copper (refined copper for Hayden/Amarillo)]:

The week splits somewhat evenly between new mines and expansions, which roughly mirrors the industry as a whole: S&P Global’s Copper in the Age of AI puts the potential incremental supply in its 2040 project pipeline at 52% greenfield and 48% brownfield.

Meanwhile, Hayden/Amarillo belongs to neither group. It would turn concentrate and scrap into refined copper, adding to U.S. processing capacity without increasing the amount of copper mined.

Brownfield: capacity added against decline

Expansions are attractive because they reuse existing permits, infrastructure and orebody knowledge, and the capital figures reflect that.

Mantoverde Optimized costs $176m to raise sulphide throughput from 32,000 to 45,000 tonnes of ore a day for about 20 ktpa of copper, roughly $8,800 per tonne of annual capacity. Copper World’s $2.07bn initial capital against its first-five-year output works out at about $24,600 per tonne. And Ray’s proposed concentrator would more than double that mine’s contained-copper output.

But how much of that capacity becomes net supply growth depends on what is happening to the existing base.

Richard Schodde of MinEx Consulting tracked 77 major copper mines that were operating in 2010 and accounted for about 80% of world mine output that year. Between 2010 and 2024, their contained copper resources rose by 75% while their annual metal production rose by 4% as ore grades declined. Over the same period, exploration around existing mines and older advanced projects added four times as much copper to resources as new greenfield discoveries. MinEx’s conclusion is that this brownfield work has mainly sustained existing operations: the additional resources extended mine lives and supported higher throughput of lower-grade ore, with little effect on annual output.

The same pressure is visible in this week’s disclosures. Grupo México’s Q3 report attributes part of its lower copper production to declining grades in Peru and at Asarco, where the U.S. expansions are proposed. Capstone’s Chile programme includes $165m of mine development and $150m of sustaining capital in 2026 alongside $220m for Mantoverde Optimized and Pyrite Augmentation, so a share of the headline figure goes toward maintaining current production. Ray’s 58 ktpa is therefore a gross addition at one mine; its contribution to group output, and to global supply, depends on the rate of decline elsewhere.

Greenfield: a development backlog

The greenfield share of the pipeline is largely drawn from deposits that have already been found. S&P’s October review counts 263 major copper discoveries made between 1990 and 2025, of which 165 are not yet in production. Most of those are some distance from construction (135 have not completed feasibility studies and 17 are in construction or preproduction), but the exploration needed to identify them has already been carried out and paid for, often in earlier cycles.

This week’s two greenfield projects show how varied that backlog is. Copper World has an FID and reserves for a 15-year operation under existing state and local permits. Its output is phased: about 84 ktpa from an initial concentrator over the first five years, rising to about 120 ktpa in years 6-10 after a further $443m concentrator expansion and $242m of in-pit crushing and conveying. The widely cited 102 ktpa is the first-decade average, and a proposed 37-year extension would require federal permits. Even a sanctioned greenfield mine reaches full headline capacity through a later expansion of its own.

Santo Domingo is permitted, and its 2024 feasibility study projects about 106 ktpa over the first seven years and 68 ktpa over the life of mine for $2.3bn of initial capital. That estimate is in 2023 dollars and is being revised, and Capstone still needs to complete engineering and financing before an FID. Its location about 35 km from Mantoverde allows it to share district infrastructure, which gives a technically greenfield project some of the cost advantages of an expansion.

The constraint on the backlog is conversion. In a separate sample of 89 projects at prefeasibility or feasibility stage, MinEx found 46 had stalled, often for economic, environmental or social reasons. The 165 undeveloped discoveries show that the deposits exist while saying nothing about how many can be built on current economics and permitting.

Exploration: rising, but concentrated near existing mines

Copper exploration budgets rose 32% to $4.3bn in 2026, the highest nominal level since 2012, according to S&P’s annual survey. However, while exploration budgets rose, proportional allocations to grassroots exploration remain near the historically low levels observed in 2024 and 2025. S&P also found that most of the annual growth in discovered copper came from deposits associated with existing mining complexes. Capstone’s programme shows the same balance at company level: $70m for exploration against at least $2.3bn for Santo Domingo.

With that said, there’s a potential implication hiding in the backlog of copper discoveries noted in S&P’s review: adequate new mine development may not require a corresponding boom in grassroots exploration. Much of the work required to identify those deposits has already been completed, often decades ago. For this part of the supply cycle, spending money developing known resources may be considerably more productive than spending it searching for new ones.

More broadly speaking, the week’s announcements are a reasonable summary of how the industry expects to grow supply. Expansions such as Ray and Mantoverde are the cheapest additions but partly replace production lost to falling grades. New mines such as Copper World and Santo Domingo have to provide much of the net growth, and they come from a stock of deposits discovered in the past. And while exploration budgets are rising, much of the geological groundwork for those investments has already been done.

For now, the interesting thing to watch may be less about finding new copper vs not finding it, and more to do with the split between adding copper to available resource inventories vs adding copper to annual production.

04 WHAT TO WATCH

This week’s announcements are just a snapshot of a much larger development pipeline. But the projects provide several concrete milestones worth following as miners pursue different routes to additional copper production.

/ Teck’s Highland Valley Copper Mine Hit by Workers’ Strike

Workers began strike action at Teck Resources’ Highland Valley Copper mine in British Columbia on October 24. The company said operations were continuing at reduced capacity.

/ Europe’s Copper Recyclers Warn Trade Barriers Could Undermine Supply

The Bureau of International Recycling warned that restrictions on recovered-metal exports could disrupt the recycling industry and constrain copper availability. Recycled copper already accounted for roughly one-third of the raw material used in global copper production, making scrap trade increasingly important to future supply.

/ Codelco Faces Government Audit Over Suspected Inflated Copper Production

Chile’s comptroller general expects to complete an audit of Codelco’s 2025 production figures within two months, following evidence that copper output may have been counted twice across different divisions.

/ Atlantic Copper Opens €550 Million Electronic Waste Recycling Facility

Atlantic Copper’s new CirCular facility in Huelva, Spain, can process up to 60,000 tonnes of electronic waste annually, recovering copper alongside gold, silver, platinum, palladium and nickel. The €550 million investment adds a recycling operation to the company’s existing copper smelting and refining complex.

/ China Resumes Sulphuric Acid Exports to Chile After Three-Month Halt

China shipped 31,666 tonnes of sulphuric acid to Chile in September, its first deliveries since May, accounting for 93.5% of China’s total acid exports that month. However, Chilean copper producers remain exposed with shipments still below earlier levels.

That's the wire for today. Until next time, keep digging.

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