Copper production lost at the Collahuasi mine in northern Chile’s region I as a result of an ongoing strike by subcontracted workers will not likely be recovered.
The mine is controlled by Anglo-Swiss Xstrata and London-based Anglo American, both with a 44% stake.
See http://www.bnamericas.com/news/mining/Collahuasi_unlikely_to_recover_lost_production,_expansion_could_be_delayed/187880690.