Ore Daily PerspectiveAntamina's halt idles about 1.4 kt of copper a day
Antamina's copper output was up nearly half this year before Tuesday's stoppage. The mine supplied almost a fifth of Peru's copper in January to August. Output elsewhere in Peru fell.
What a day is worth
Antamina produced 342,104 t of copper from January to August, Peru's energy and mines ministry (MINEM) says. That is up 48.7% from a year earlier. It works out to about 1.41 kt a day, or 9.9 kt a week, by Ore Daily's calculation. At Tuesday's LME three-month price of $14,421.50/t, reported by Reuters, a day of that output holds about $20M of contained copper.
Teck's unchanged 2026 guidance implies a slower second half. Its 95–105 kt for a 22.5% share equals 422–467 kt for the whole mine. After Teck's reported 244.1 kt in the first half, on a 100% basis, that leaves 178–223 kt for July to December, by Ore Daily's calculation. That is 0.97–1.21 kt a day, against 1.35 kt a day in the first half.


One mine carried Peru's growth
Antamina supplied 18.7% of Peru's mined copper in January to August, by Ore Daily's calculation from MINEM data. National output rose 1.2% to 1,829.8 kt. Without Antamina, Peru's output fell 5.7%, to 1,487.7 kt from 1,577.6 kt.
The mine's 2025 copper output fell 9% to 395,121 t, MINEM data show. Reuters linked that drop to an earlier fatal accident, while Teck cited less copper-only ore. In April 2025 a manager was killed at the site, and the mine began restarting two days later, Reuters reported. Teck said its Q2 2025 figures included an extended shutdown after the fatality. Antamina's 2025 tonnage equals about 1.7% of world mine output of 23.0 Mt, based on USGS estimates.
Ore mix also matters. Copper-only ore made up 67% of mill feed in Q2, up from 23% a year earlier, Teck said. Zinc output fell to 54.0 kt in Q2 from 142.0 kt.
The halt lands in a tight market for concentrate. Sucden Financial said on Tuesday that constrained concentrate supply is supporting prices. ING's Ewa Manthey said tight supply should keep a floor under copper.
What to watch
There is no restart date. A source close to the company told Reuters there is no timetable while the investigation runs.
Teck reports Q3 results and Glencore its Q3 production on Thursday, Oct. 29. Teck's figures will show whether its unchanged 2026 Antamina range still holds. MINEM's September bulletin will show the mine's pace in the month before the halt.
Sources: Reuters via MINING.COM, Oct 27 · GBM Media (Reuters), Oct 27 · MINEM Boletín Estadístico Minero · Teck Q2 2026 · Teck 2025 MD&A · Reuters via Investing.com, Apr 2025 · Reuters via Business Recorder, Oct 27 · USGS MCS 2026
Ore Daily analysis of public data. Figures are as reported by the sources.



