So BHP Billiton and Rio Tinto are pushing ahead with the $116bn merger of their Western Australia iron ore operations, a plan first flagged in June.
The miners aim to combine their Pilbara assets, ports, railways and workforces to save $10bn in synergies, though each will market their iron ore separately.
But will regulators bless the deal? Global customers of iron ore believe it will entrench the miners' pricing power.
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