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Hugo T. Dummett (1940–2002) was a South African mineral-exploration geologist who is best known for his role in the discovery of the Ekati Diamond Mine in the Barren Lands of Canada's Northwest Territories. Dummett has been described as “the brains, the ideas and the energy” behind the discovery of Ekati, which led to the creation of a new Canadian diamond-mining industry.〔 ==Career== Dummett earned his BSc degree at the University of the Witwatersrand in 1964, and moved to Canada in 1965. In 1970, he entered the University of Queensland for graduate work. In 1977, Dummett signed on with Superior Oil to prospect for diamonds in North America, just as the science of using indicator minerals -- pyrope garnets, chrome diopside and chromite—for diamond exploration was being worked out. Superior formed a joint venture with Falconbridge, and the JV hired geologist Charles Fipke for the diamond exploration project. Early in the program, Dummett tried to convince Governor Bill Clinton to lease Arkansas's Crater of Diamonds State Park.〔Kevin Krajick, ''Barren Lands: An Epic Search for Diamonds in the North American Arctic.'' 2001, Freeman/Henry Holt, ISBN 0-7167-4026-5〕 Between 1979 and 1982, the partners found at least 20 kimberlite pipes, but none had commercial diamond potential. The Falconbridge-Superior joint venture then funded a research program by South African geochemist John Gurney, to study possible indicator minerals for diamondiferous pipes. By 1982, Gurney had established that the kimberlite pyrope garnet "G10" was critical to diamond discovery. Pipes without the G10 garnet were likely to be barren. Using this new technology, the JV discovered a promising pipe in eastern Botswana, but lost the land to De Beers, who later discovered a commercial diamond deposit there.〔 Mobil Oil then bought Superior, and ended its mineral exploration program in 1983. Dummett convinced Mobil to turn over its data to Fipke so the exploration effort could continue.〔〔 Fipke and his partner Stewart Blusson, working on a "shoestring," staked some promising ground near Lac de Gras in 1989. Dummett took a new job with BHP Minerals in 1989, and convinced his new employer to lease their property. In 1991, BHP drilling on their leased claims found micro-diamonds, sparking one of largest claimstaking rushes in mining history.〔 Under Dummet's direction, BHP eventually developed commercial diamond reserves in five pipes; the discovery pipe turned out to be non-commercial.〔 BHP began the permitting process for the Ekati Diamond Mine in 1995, received final approval in 1997, and opened the mine late in 1998.〔( Ekati Diamond Mine history ) at BHP Billiton〕 By 2009, annual sales from EKATI amounted to about 5% by value of world diamond production.〔(Ekati Diamond Mine ) at BHP Billiton〕 In 2001, Dummett joined Ivanhoe Mines as Vice President. He contributed to the discovery of a large porphyry copper-gold deposit that was renamed in his honor, at the advanced Oyu Tolgoi project in Mongolia.〔 Dummett was killed in an automobile accident in South Africa in August 2002.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hugo Dummett」の詳細全文を読む スポンサード リンク
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