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Initially, many metals were obtained through openpit mining, and ore was primarily extracted from shallow depths, rather than through deep mine shafts. Around the 14th century, the growing use of weapons, armour ...
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Gemstone mining as a development cluster A study of Brazil''s 13 Nov 2010 ing conceptual support to policies in small scale gem mining in. Brazil, as gem mining . istic of the Itabira case is that almost no gem processing takes ...
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Using a sluice box to extract gold from placer deposits has long been a very common practice in prospecting and smallscale mining. A sluice box is essentially a man made channel with riffles set in the bottom. The riffles are ...
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Journal of Cleaner Production 11 (2003) 141–146 Smallscale mining and cleaner production issues in Zambia Stephen M. Kambani ∗ School of Mines, University of Zambia, Box 32379, Lusaka ...
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according to the May 1999 issue of Earthworks Magazine, the UN calculated that, in 1996, six million people were involved in smallscale mining activities world wide. A more recent report by the International Labour Organization (ILO,
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