Teck Resources said expansion at the Compania Minera Antamina-owned copper-zinc mine will help raise ore throughput by 38% a day to 130,000t and copper and zinc output per annum by 30%.
Peru-based Antamina is jointly owned by BHP Billiton, Xstrata, Teck Resources and Mitsubishi.
An investment of $1.29bn is planned for the Antamina mine for the expansion of mining and processing units.
Greater mineral ore reserves as well as higher processing capacity will result in an extension of mine life by six years from 2023 to 2029, according to Teck Resources.
Initial production after expansion is expected to take place in late 2011.