On the last of a three-day national hearing, BHP and Rio acknowledged they were in ongoing discussions with auditors from the Australian tax authority.
Quebec's $1 billion Capital Mines Hydrocarbures fund is close to buying equity stakes in mining projects outside iron ore worth as much as $200m a shot.
The Brazilian judge in Eike Batista's landmark trial was first caught driving mining tycoon's seized Porsche and is now charged with embezzling drug money.