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Aurora mine
The Aurora mine is the largest integrated phosphate mining and chemical plant in the world. The mine is located in Richland Township, just outside Aurora in Beaufort County, North Carolina. The mine which is owned since 1995 by PotashCorp, the world's largest potash producer and the second and third largest producer of nitrogen and phosphate, has an annual production capacity of over six million tonnes of phosphate ore.〔 In 2008 the mine produced 6.6 million tonnes of phosphate ore from which 1.3 million tonnes of phosphoric acid was produced.〔
==History==
The phosphates of the Aurora mine are the result of a recession experienced by the sea coast of Aurora. Phosphates were deposited into the sea about 15 million years ago. The result was a phosphate ore zone with of low-grade phosphate sand blanketed by sand silt. The ore zone is estimated to be about thick, consisting of phosphate sand, fine quartz, clay and silt.〔 PotashCorp bought the Aurora mine in 1995 from the Texasgulf company as its first phosphate operation, and purchased the agricultural products division of Occidental Chemicals six months later.
As of 2005 the Aurora mine had estimated proven and probable reserves of approximately 356 million tonnes of phosphate rock at an average grade of 30.7% P2O5. PotashCorp has rights to exploit an area of of phosphate-bearing reserves, sufficient to support the mines operations for around 75 years.〔 In 2009 the mine produced 4.2 million tonnes of phosphate rock and 0.93 million tonnes of phosphoric acid and had a number of 1,093 employees. In June 2009, PotashCorp received permission from the US Army Corps of Engineers to mine reserves within the extraterritorial jurisdiction boundaries for a period of 30 years.〔
The phosphate rock is transported by waterway to the deep water port of Morehead City and a railroad links the mining complex to the Norfolk Southern Railway and CSX Transportation rail networks.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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