Chile's Codelco opens new mine with copper at 6-year low Chilean state mining giant Codelco inaugurated on Tuesday the Dacita mine, located in El Teniente division, in Rancagua, and which is expected to produce 50,000 tonnes of copper annually. Codelco plans to reduce costs in 2016 by an additional 600 million dollars, designated to confront the drop in the copper’s international prices. IMAGES AND SOUNDBITES