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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Uranium mining in Utah ： ウィキペディア英語版 Uranium mining in Utah Uranium mining in Utah, a state of the United States, has a history going back more than 100 years. Uranium started as a byproduct of vanadium mining about 1900, became a byproduct of radium mining about 1910, then back to a byproduct of vanadium when the radium price fell in the 1920s. Utah saw a uranium boom in the late 1940s and early 1950s, but uranium mining declined in the 1980s. Since 2001 there has been a revival of interest in uranium mining, as a result of higher uranium prices. ==Uravan mineral belt== Mining of uranium-vanadium ore in southeast Utah goes back to the late 19th century, at the northern end of the Uravan mineral belt (see ''Uranium mining in Colorado''), where it crosses into Grand County, Utah. Uranium occurs in the Salt Wash member of the Morrison Formation of Jurassic age. Because much of the value depended on the vanadium content, the only economic ore minerals were carnotite and tyuyamunite. Following World War II buying for nuclear weapons programs made uranium valuable for its own sake, and attracted hundreds of prospectors to southeast Utah.〔R.P. Fischer (1968) ''The uranium and vanadium deposits of the Colorado Plateau region'', in ''Ore Deposits in the United States, 1933-1967'', New York: American Institute of Mining, Metallurgical, and Petroleum Engineers, p.738.〕 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「Uranium mining in Utah」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.