File:Drift mine diagram.PNG
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DescriptionDrift mine diagram.PNG |
Deutsch: Schnittskizze eines Goldbergwerks im Yukon territory. Zugang durch den Haspelschacht shaft, der den Permafrostboden frozen gravel durchteuft. Von der Sohle des Schachtes wird eine Strecke (oder Weitung) drift in der goldführenden Schicht gold-bearing sediment aufgefahren und dabei das Gold abgebaut. Die Tundra ist im arktischen Sommer moosbedeckt (moss), zwischen der Tagesoberfläche und dem Permafrostboden befindet sich eine Schicht Moorerde (muck). English: Diagram of a drift mine in frozen ground, as found in Alaska or Yukon in the early 20th century. The notation TAR is presumably the artist's initials (Thomas Arthur Rickard) |
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Date | copyright 1909 | ||
Source | Through the Yukon and Alaska [1] Mining and Scientific Press, San Francisco, 1909 p211. | ||
Author | T.A. Rickard | ||
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Public domainPublic domainfalsefalse |
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 14:24, 6 December 2010 | 1,645 × 1,159 (38 KB) | Dankarl (talk | contribs) | {{Information |Description={{en|1=Diagram of a drift mine in frozen ground, as found in Alaska or Yukon in the early 20th century. The notation TAR is presumably the artist's initials (Thomas Arthur Rickard)}} |Source=''Through the Yukon and Alaska'' [htt |
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