Teck revenues get a shot in the arm from record Q2 copper prices.

The expansion of the Mongolia mine, Rio's biggest copper growth project, has seen costs balloon up to $6.75 billion.

Australian companies raise funds to advance a suite of projects including copper, nickel, gold, silver, lithium rare earths and uranium.

Prices snapped a five-session winning streak under pressure from a rebounding dollar as investor focus shifted to a US Federal Reserve meeting.

The task of agreeing on regulations by mid-2023 is "seemingly insurmountable".

Benchmark nickel prices on the London Metal Exchange, at $19,500 a tonne, are up more than 20% since April and at their highest since February.

Negotiations over the past two months between the company and its powerful workers' union over a new labor contract have been conducted in utmost secrecy.

Residents of three communities in the Chumbivilcas province of the Andean region of Cusco began the blockade on July 23.