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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 Sala Silver Mine ： ウィキペディア英語版 Sala Silver Mine Sala Silver Mine ((スウェーデン語:Sala silvergruva)) is a mine in Sala Municipality, in Västmanland County in Sweden. The mine was in continuous production from the 15th century until 1908. Additional mining occurred in 1950-1951 and also in 1945-1962 in Bronäs Mine, located nearby. ==Geology== The Sala ore is mainly known for its high silver content though the ore also contained economic amounts of lead and zinc. The zinc was hosted by the mineral sphalerite while lead was hosted by the mineral galena. Silver occurred as a native phase rarely but was mainly hosted by complex antimonides and sulphosalts, dispersed in the matrices of galena and sphalerite, invisible to the naked eye but visible in microscope. The silver content in typical galena-dominated Sala ore was about 0.15% to 1%, the latter being one of the highest contents of silver in galena ever reported. In the sphalerite-dominated ore, the silver content is only about 0.015-0.02%, which was still enough to exploit and would even be at present days, given that a sufficient tonnage of metallurgically advantageous ore could be found. The bedrock was created about 1,89 billion years ago during the paleoproterozoic era. The host rock to the mined ore is dominated by white dolomitic marble, proximal to the ores commonly rich in skarn minerals such as tremolite, serpentine, diopside and chlorite, giving the dolomitic marble at Sala a characteristic green colour. ~ 100 meters away from the mine, more pure white dolomitic marble poor in skarn minerals is extracted at the Tistbrottet dolomite quarry. 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「Sala Silver Mine」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.