RANKED: World’s 10 biggest copper mining companies

Buenaventura said that it was forced to fire some workers because gold and silver reserves at Orcopampa have gone down and so has production.

Australian experts are paying attention to low-impact exploration tools.

Inmarsat has committed to providing the state government with a smart monitoring solution which is based on IoT and satellite technology.

The mine, near Rankin Inlet in Nunavut, is expected to produce about 230,000 ounces of gold this year at total cash costs of $612 per oz.

Investors worry a referendum on mining in Imbabura, the province in which its flagship Cascabel copper-gold project is located, could jeopardize the mine's future.

The threat of "weaponizing" rare earths by China means potential sellers of the minerals to the US stand to gain from a tightened international supply and higher prices.

If approved, Hume's mine is expected to produce 50-million tonnes of run-of-mine coal over 23 years.

Debt financing agreements worth $200 million could be finalized “any day” and are expected to catalyze equity financing to start the almost 30-month development of the 1.1 billion-tonne Colluli sulphate of potash project, the company said.

On the supply side, Fitch expects production misses from Australia to keep the market tight in the coming quarters as large diversified miners lose their appetite for mining coal.