The 1996 Annual Conference of the Mining History Association MHA was in Rossland British Columbia Canada June 6 Rossland is called the Golden City because of the large gold output from its mines from 1891 to 1928
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Early hardrock miners in Nevada used a traditional technology derived from medieval Europe Spanish Colonial America and China They dug open glory holes or shallow shafts down to a depth of 100 200 feet to reach the ore body
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The word entered the American vocabulary during the 1848 California Gold Rush and when gold was discovered in Alaska and the Canadian Klondike in the late 1890s the gold seekers who rushed northward brought with them various placer mining technologies By far the simplest was the prospector s pan that worked by swirling a
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Of North Korea s identified mineral resources deposits of coal iron ore magnesite gold ore zinc ore copper ore limestone molybdenite and graphite are larger than other mineral commodities These mineral resources all have the potential for the development of large scale mines Table 1 shows North Korea s mineral resources data
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1 Mining open pit and underground To define the ore from the waste rock samples are taken and assayed Assay results are used to mark out areas of ore and waste rock which are mined separately
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