Nornickel said last week that the spin-off of the Bystrinsky mine near the Russia-China border would happen within two years subject to regulatory and other approvals.
Police in Rio de Janeiro will investigate Vale CEO Eduardo Bartolomeo, and other executives and former directors over the deal to explore the giant iron-ore mine in Guinea.
A 200,000-strong Brazilian claimant group failed to resurrect a 5.0 billion pound ($6.9 billion) English lawsuit against the mining giant over the Fundão dam failure.
The miner will form an Indigenous advisory group to help it better understand issues affecting Indigenous Australians, identify gaps in current protocols and re-establish trust over time.