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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 Muruntau gold deposit ： ウィキペディア英語版 Muruntau gold deposit The Muruntau gold deposit is situated in the Kyzyl Kum Desert of Uzbekistan. It is being mined in the world's largest open pit gold mine with production believed to be of the order of two million ounces per annum. The open pit measures about 3.5 by 2.5 km and extends to a depth of 560m (2012). The gold ore resource in the Muruntau deposit, including production, is about 170 million ounces of gold. The giant Muruntau Gold deposit was discovered in 1958. The area was a source of turquoise since the days of the Silk Road. It was not until the 1950s, however, that the Muruntau area was systematically explored. A large gold and arsenic geochemical anomaly, detected during systematic geochemical sampling and geological mapping of the area indicated the Muruntau deposit. Auriferous quartz veins were subsequently found in surface exposures at the site of the current open pit. Mining commenced on the deposit in 1967, and production has been continuous ever since. ==Tectonic setting== The Kyzyl Kum area is underlain by three main tectonic units.〔(【引用サイトリンク】 title=Orogenic golddeposits: A proposed classification in the context of their crustal distribution and relationship to other golddeposit types )〕 The oldest, basement, consists of metamorphosed and folded Lower Palaeozoic carbonaceous and sulphidic clastic rock referred to as the Besopan Formation.〔 The Besopan Formation was metamorphosed and deformed during the Lower Palaeozoic Caledonian orogeny.〔(【引用サイトリンク】title=Gold ore deposits of Uzbekistan: Geochemistry and nanomineralogy of tellurium and selenium )〕 〔(【引用サイトリンク】title=Age and source constraints for the giant Muruntau gold deposit, Uzbekistan, from coupled Re-Os-He isotopes in arsenopyrite )〕 After erosion and exhumation it became basement to an unconformable unit of Devonian to Early Triassic carbonate and clastic sediments and volcanic rocks.〔 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「Muruntau gold deposit」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.