Codelco Suspends Andes Norte Development Amid Seismic Risk Concerns
Codelco, the world's largest copper producer, has suspended development of its Andes Norte project at the El Teniente mine in Chile due to seismic risk concerns. The decision comes after a six-month monitoring program detected new and unexpected seismic activity at greater depths than previously monitored.
El Teniente is one of Codelco's seven mining divisions and is considered one of the largest known underground copper mines in the world. The mine has been in operation for over a century and sits within a porphyry copper deposit estimated to contain one of the largest undeveloped copper ore bodies in the Southern Hemisphere.
The panel caving technique used at El Teniente involves removing rock mass at depth, which can create highly stressed regions that can fail suddenly if the stress magnitude exceeds the rock mass strength. The seismic activity detected at Andes Norte is different from historical patterns managed at El Teniente and represents an unknown risk.
Codelco's decision to suspend development of Andes Norte is a case study in how the company navigates the boundary between operational ambition and geomechanical uncertainty, which has significant implications for the long-term copper supply outlook.