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Kvanefjeld (or Kuannersuit), in Greenland, is the site of a mineral deposit, which is claimed to be the world's second-largest deposit of rare earth oxides, and the sixth-largest deposit of uranium. There are also substantial sodium fluoride deposits, and Kvanefjeld is thought to be one of the largest multi-element deposits of its kind in the world.〔(【引用サイトリンク】accessdate=2010-09-13 )〕 A recent relaxation of regulations by the government of Greenland has opened up the possibility of large-scale mining by Greenland Minerals and Energy.〔(【引用サイトリンク】accessdate=2011-01-13 )〕 The Kvanefjeld site is part of the Ilimaussaq intrusive complex.〔(【引用サイトリンク】accessdate=2010-09-13 )〕 Rare earths and uranium are typically concentrated in lujavrite.〔(【引用サイトリンク】accessdate=2010-09-13 )〕 Lujavrite, a dark agpaitic nepheline syenite, occurs as an internal layer in the north Ilimaussaq complex. The uppermost sections generally have the highest rare earth elements, uranium and zinc grades. Lujavrite is a rare variety of nepheline syenite having amphibole, aegirine pyroxene, nepheline and feldspar. The red spots in the rock are crystals of the rare halide mineral villiaumite (NaF - sodium fluoride). The Kvanefjeld project is 100% owned by ASX-listed Greenland Minerals and Energy Limited.〔(【引用サイトリンク】accessdate=2011-08-15 )〕 Kvanefjeld is already known among mineral collectors as a source of fluorescent minerals such as tugtupite and chkalovite.〔(【引用サイトリンク】accessdate=2010-09-13 )〕 ==References== 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「Kvanefjeld」の詳細全文を読む スポンサード リンク
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