The workers at Codelco have complained about a lack of investment at the firm's troubled Ventanas smelter.

Chile is also in the process of overhauling its market-orientated Constitution which dates back to the military dictatorship of Augusto Pinochet.

The workers have complained about a lack of investment at the mining firm's troubled Ventanas smelter.

Union said the company was refusing to share 10% of profits from the 2021 fiscal year among over 3,500 direct employees.

Analyst Barbara Mattos explained that a ban on activities around glaciers could potentially impact 20-25% of current copper production.

The $3.3 billion project has been criticized for its impact on water availability in the populous capital region.