Vale reports 33 of 104 dam structures fail stability assessments

Great Panther Silver's modus operandi is to buy a past-producing mine, get it up and running as quickly as possible, and use the cash flow to fund more acquisitions, says CEO Bob Archer

The company expects demand to increase 3% this year, while no new mines are scheduled to come online in the short-term and supply disruptions continue.

The $400 million-deal will make of Trevali the first pure zinc company with operations in North and South America as well as Africa.

The 10 largest gold mining companies produce 30% of the world's gold and enjoy some of the sector's fattest margins.

Disputes at BHP Billiton’s Escondida mine in Chile, the world's biggest copper mine, and Freeport’s Grasberg and Cerro Verde mines, are also having a significant effect on global supplies of concentrate.

The mine produced just under 500,000 tonnes of the red metal last year, making it Peru's largest copper operation.

The country expects mining investments to increase 360% in the next four years compared to the 2013-2016 period as it has already granted 160 of the 420 explorations licences it put out to tender in July.

The rankings are based on data for academic reputation, employer reputation, research citations per paper and research impact.

He joins a growing list of chairmen who are leaving some of the world's' top mining companies, including BHP Billiton and Anglo American.