Barrick Gold’s CEO has no intention of raising his offer to buy out the rest of troubled African unit Acacia Mining – but he will use the next three weeks to talk. Barrick said on Tuesday it received a three-week extension to make a formal offer to minority shareholders for the roughly 36% stake in Acacia it doesn’t already own. In a separate statement, Acacia said it’s open to a formal offer, provided the price is fair and its shareholders support the transaction.