London-listed Anglo American, BHP Billiton and Xstrata are all involved in copper mining in Chile.
Chile copper mines, ports recover

All but one of Chile’s biggest copper mines hit by the massive weekend earthquake had restored operations by Monday, but persistent power supply problems threatened to restrict production rates.
Anglo American’s earthquake-related copper losses less than 1,500t

Multinational resource group Anglo American’s (LSE: AAL) Chilean copper operations suffered a production loss of less than 1,500t due to stoppages following Saturday’s (Feb 27) earthquake, the company said in a release.