The bonds were announced last November and issued at US$200,000 each to raise a massive US$400mln as part of the financing for the project - believed to be the world's largest high-grade known deposit of polyhalite - used as a fertiliser. BHP Billiton PLC ( LON:BLT ) has named packaging executive Ken MacKenzie as its next chairman, a tricky job given recent calls from activist investor Elliott Management for the global mining giant to offload its petroleum business and overhaul the board. MacKenzie, who was considered one of Australia's most successful chief executives in his ten years running Amcor Ltd, will succeed current BHP chairman, Jac Nasser from September.