50 investors representing $105 billion wrote about concerns of the social and environmental impacts of the Northern Dynasty's proposed Pebble mine.

Pampacancha is a high-grade satellite deposit located 4 km from the mill at Hudbay's Constancia mine in Peru.

Zinc miners have struggled to recover from disruptions caused by covid-19, causing extreme tightness in the concentrates market.

Glencore declined to say how much acid was spilled from the tank, but said KCC immediately contained the spill and conducted follow-up monitoring of the environment.

The very low rate sale - done via a tender last week - comes as disruption to mine supply globally puts pressure on TC/RCs.

The company, part of China's Zijin Mining, said it planned to boost output of copper concentrate by 38.91% to 74,010 tonnes this year.

With a 27-year life, the project would involve 20 years of mining and seven years of stockpile processing at a 120,000 t/d flotation concentrator.

The estimate brings five new deposits at the project in western Turkey into resources.