Workers at the El Soldado copper mine in central Chile have called for a ballot on a strike after pay talks ended without agreement.
In a statement Friday, the Copper Workers Federation said the last offer from management included no pay increase.
The workers "have been preparing for this outcome for some time and expect an improved offer" if a strike was to be avoided, the federation said.
In 2015, the mine produced 35,840 mt of copper in cathode and concentrates.
Anglo American has put its 50.1% stake in the mine up for sale. State-owned Chilean copper company Codelco plus Mitsui and Mitsubishi of Japan own the balance of the shares.
