 Chiles Candelaria copper mine, run by the Canadian firm Lundin Mining Corp, on Tuesday rejected claims by the mine supervisors union that it is planning to lay off workers, saying the claim relates to the offer of an early retirement package for older workers. Candelaria said the measure was part of an optimization programme to ensure the sustainability of its operation in Chiles northern Atacama region. Copper production out of Chile has not yet been significantly impacted since the coronavirus outbreak started in March. 