Thursday, November 4, 2010

Canadian Diamond Mines

Ekati Diamond Mine
 
Both the Ekati and Diavik mines are located in the pristine arctic wilderness of Canada's Northwest Territories some 350 miles south of the Arctic Ocean. The Ekati diamond mine is Canada's first diamond mining operation. It is located on Lac de Gras, in the Northwest Territories, Canada. Prospector Chuck Fipke discovered the Lac de Gras kimberlite pipes in 1991.

Ekati means "Caribou Fat Lake" in the language native to the Dog-Rib Indians of the Northwest Territories (NWT). The Ekati mine began operations on October 14 1998. The Ekati Diamond Mine now produces an average of three million carats of rough diamonds every year.

Diamonds from the Ekati mines are found in 45 to 62 million year old kimberlite pipes which lie directly underneath shallow lakes formed in inactive volcanic calderas or craters (crater lakes). Diamonds from the Ekati Mine are sold under the trade name "Aurias" and their authenticity is verified through the "CanadaMark" service, operated by BHP Billiton Diamonds Inc. BHP Billiton Group is the world's largest diversified resources company.

The Ekati Mine laser-engraves the girdle of each diamond with the Ekati logo and a unique serial number signifying its authenticity and Canadian origin. The laser-engraving is only visible under magnification and using special light filters.





Diavik Diamond Mine

The Diavik open-pit diamond mine is located approximately 20 kilometers south-east of the Ekati diamond mine and 300 kilometers northeast of the capital city of Yellowknife in the Northwest Territories, Canada. The Diavik Mine is built over four kimberlite pipes that lie directly beneath the existing shallow lake-bed of Lac de Gras. Mining operations are located on Lac de Gras' East Island. Due to the harsh weather conditions, access to the Ekati and Diavik mines is by air or a temporary ice road. The gravel landing strip can accommodate large jet aircraft.

The mine began construction in 2001 and mining production commenced on January of 2003. The Diavik diamond mine is a joint venture between the Aber Diamond Corporation and Diavik Diamond Mines Inc., a subsidiary of Rio Tinto Group and was built for a cost of 1.13 billion dollars. The Diavik mine is expected to produce 1.5 million tons of kimberlite ore material in its estimated 16-22 year lifespan. The mine employs some 700 workers and produces around eight million carats (approx. 90 million dollars US) of rough diamonds per year.

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