$93bn a year needed for Africa infrastructure

Zambia suffered a nationwide blackout following a power system disturbance.

Rusal said disruption to bauxite supplies from Guinea and Brazil and output suspensions in Australia contributed to a surge in alumina prices.

The mine’s four-week trailing average production reached almost 1,900 ounces, below the 2,000 to 2,500 ounces range Hummingbird expected.

A new report details subpar investor returns in the mining industry over the last decade, particularly big cap diversified companies which have not adapted to new realities.