Angola mine leak causes ‘unprecedented’ pollution in Congo rivers, researchers say

BHP's Escondida continues to lead the way as the top copper operation on the planet.

Last week's accident, which briefly sent Glencore's shares tumbling 7%, underscored foreign investors' exposure to illegal mining activity on their properties.

In a report on Monday, the commodities giant said it is reviewing all entities located in tax-haven jurisdictions.

Last Thursday's tragedy ratcheted up pressure on companies to make changes to security and community outreach.

Congo's interior minister vowed to remove all illegal miners by Sunday from a copper and cobalt mine run by Glencore following a landslide this week that killed at least 43 of them.

Workers will go to extreme lengths to break into mine sites in Africa, sometimes tunneling underneath walls or living underground to extract ore with a pick-axe.

The miner, which has been making losses on an operating basis since at least 2013, had total debt of $32.2 million as at June 30, 2018.

The case has intensified concerns among international miners about resource nationalism in Africa.

Army will deploy at the KOV open-pit mine as the search for more victims continues.