BHP Billiton Ltd. (BHP.AU) posted full year iron ore output of 114.4 million metric tons Wednesday, up 2% on year but well below previously stated guidance of 130 million metric tons.

BHP Iron Ore President Ian Ashby had warned in May that the iron ore output was likely to come in "a few million tons short" of the guidance due to disruptions caused by a series of accidents at the miner's operations in the Pilbara region of Western Australia state.

Iron ore production for the fourth quarter was down 10% on year to 27,048 million tons, and BHP said the tie in of its Rapid Growth Project 4 expansion was continuing to impact production.

Copper production for the quarter fell 21% on year to 307.2 million tons and BHP said provisional pricing impacts on the red metal were set to decrease earnings by US$936 million.

Petroleum output for the quarter rose 4% on year to 37.56 million barrels of oil equivalent as new projects boosted production.

Alumina production fell 4% on year to 1.1 million tons for the quarter and aluminum dipped 5% to 310,000 tons partly on power shortages in South Africa.

Manganese ore output fell 32% to 500,000 tons and metallurgical coal rose 4% to 9.5 million tons.

-By Alex Wilson, Dow Jones Newswires; 61-3-9292-2094; alex.wilson@dowjones.com