The company booked US$908 million in net impairment charges in 2017, partly related to a protracted dispute between the Tanzanian government and Acacia Mining Plc, of which Barrick is a majority shareholder. Shares of Acacia plunged earlier this week after the London-based company said production will fall sharply this year. It cancelled its dividend and interim Chief Executive Peter Geleta said it hasn't received any new details since Barrick announced a preliminary agreement four months ago.