The "collaboration accord" sets up a commission to share expertise between the two companies over the next five years in "mutual interest areas".

The project is expected to provide SSR Mining with approximately 80,000 attributable gold-equivalent ounces.

Imports of unwrought copper and copper products totaled 407,294 tonnes in April.

A new resource estimate underpins the PEA at the Arizona project.

Copper inventories in Shanghai Futures Exchange warehouses fell to their lowest levels since January.

The South American country has a pipeline of copper projects that could produce 793,000 tonnes a year by the end of the decade.