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Greenland is the largest island on Earth. Only one-fifth of its surface area is exposed bedrock, the rest being covered by ice. The exposed surface is approximately 410,000 km2. Its geology is dominated by crystalline rocks of the Precambrian Shield.〔("Greenland Geology." ) ''Geological Survey of Denmark and Greenland''. 20 June 2003 (retrieved 26 Dec 2010)〕 There are large deposits of rare earth oxides at Kvanefjeld. Greenland's first gold mine is the Nalunaq Gold Mine, which opened in 2004. Nalunaq is located 33 km northeast of Nanortalik, in the Ketilidian Orogenic Belt of southern Greenland (60° 21′ 29″ N, 44° 50′ 11″ W). Hanging wall rocks at the Nalunaq Mine are Paleoproterozoic amphibolite-facies metavolcanics. Footwall rocks are volcanogenic massive sulfides. Quartz-gold mineralization here has been dated to 1.77 to 1.80 billion years ago (late Paleoproterozoic), during the Ketilidian Orogeny. 〔(Nalunaq Gold Mine ), information courtesy of the mine owner.〕 ==See also== *Gemstone industry in Greenland 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「Geology of Greenland」の詳細全文を読む スポンサード リンク
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