Copper futures rise after fatal collapse halts Codelco's El Teniente mine

Copper futures rose after a fatal collapse at Codelco's El Teniente mine in Chile forced a halt to underground operations at the world's largest underground copper deposit, adding fresh supply risk to a market already focused on tight inventories and recent mine disruptions.

Chile is the world's largest copper producer, accounting for nearly a quarter of global output. Any extended outage, safety review or regulatory response at El Teniente could reshape expectations for near-term supply.

Codelco, the state-owned Chilean producer, said a seismic event triggered the collapse in part of the underground mine, in Chile's O'Higgins region near Rancagua. Senapred, Chile's disaster agency, reported a magnitude 5.0 earthquake in the area at 5:34 p.m. local time, while other accounts described a smaller tremor deep underground. Authorities said they are still investigating whether the event was natural or related to mining activity.

The collapse blocked access routes roughly 900 to 1,200 meters below the surface. Codelco initially reported one worker dead, five missing and nine injured. About 3,000 people were evacuated and more than 100 rescue personnel were deployed. Over subsequent days, rescue teams recovered the remains of the five trapped miners, bringing the death toll to six.

Chile's mining minister ordered a temporary halt to operations, and Codelco suspended work in the affected areas. El Teniente produced 356,000 tonnes of copper last year, about 7% of Chile's national output. The mine has operated for more than a century and spans about 4,500 kilometers of tunnels.

For markets, the question is not only the length of the shutdown but whether the accident leads to broader safety inspections, slower development work or tighter operating controls.

The accident lands in a market already primed to react to supply shocks. Chilean output has faced pressure from lower production at several large mines and higher costs tied to a sulfuric acid squeeze. Visible exchange inventories remain closely watched, leaving futures sensitive to disruptions.

Other recent setbacks have reinforced that backdrop. Disruptions at Freeport-McMoRan's Grasberg mine in Indonesia and flooding at Ivanhoe Mines' Kamoa-Kakula complex in the Democratic Republic of Congo have sharpened expectations of tighter balances in 2025 and 2026.

Investors will watch for guidance from Codelco and Chilean regulators on how long suspended areas remain offline and whether the incident affects mine plans beyond the damage zone.