Once these projects are completed, Mantos Copper expects its production to nearly double to 165,000 tonnes annually.

Collahuasi, owned by Anglo American Plc and Glencore Plc, is located in northern Chile and is among the world's largest copper mines.

Authorities may consider potential revisions to the mining laws in order to make companies that already own concessions to work on them or else give them up.

The second largest ever private equity fund focused on mining closed in the first quarter – 13 funds aim to raise a further $4.9 billion in 2018.

One of the main problems, says the head of Chile’s Mining Society, Diego Hernández, is miners have no incentives to do anything with the assets they already own and is very cheap to keep them.

Copper prices will rise this year as investors look past the ample global supplies and market turbulence to focus on the metal’s long-term outlook.

It is not conclusive that Rio avoided WHT on interest on shareholder loans, and there is no clear evidence to support the claims of treaty abuse.

Anglo American Plc is moving towards a multibillion-dollar decision on building the world’s next major copper mine in Peru.