The company and minority partner BHP have spent $2 billion but have yet to produce any copper.

Tahltan Nation takes equity stake in Eskay Creek gold project, Skeena returns Spectrum mineral claims for nature conservancy.

"We’re here to talk about the revenge of the miners and how important it is that we sustainably mine copper metal for the new world economy."

Goldman Sachs this week raised its 12-month target for copper to $11,000 a tonne, while Citi recommended clients take on bullish copper exposure over the next few weeks.

The first-round winner of Peru’s Presidential election, Pedro Castillo, wants to renegotiate contracts with mining companies rather than seize assets, a party official said.

A sharp drop in this year's benchmark smelter treatment charges amounts to a collective re-assessment of the zinc market's underlying dynamics.

The mining giant is exploring the use of bunker fuels such as liquefied natural gas and biofuels to replace fuel oil, aiming to reduce carbon emissions by 40% when shipping its products.