Escondida, located in Chile's northern Atacama Desert, is the world's largest copper mine, producing nearly 5% of the world's supply.
A strike is not a certainty, as labor laws in Chile give management the option to utilize at least five days of government mediation before a strike can begin.
Three-month copper (HG1:COM) on the London Metal Exchange recently traded +0.6% to $9,782/metric ton after falling 1% on Friday.