Juan Carlos Jobet on Tuesday announced a new national mining blueprint that aims to increase the traceability of copper produced in Chile, slash water use and bolster diversity at mining companies.

History has shown that if Beijing feels the economy is losing too much steam, the stimulus taps will be re-opened.

President Laurentino Cortizo pledged that a new contract should provide more public benefit.

The state reserves administration in China released 150,000 tonnes of copper, aluminium and zinc into the market, completing a third round of metal auctions.

Country released another 150,000 tonnes of state metal inventories to the market on Wednesday.

The miner has reached an early agreement with the five unions representing workers at its key El Teniente mine.