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3 Technologies in Exploration, Mining, and Processing ...,SIDEBAR 3-2 Models for Ore Deposits with Little Environmental Impact ... These include the development of focal planes with adequate signal-to-noise spectral ... Hydraulic mining is used for placer deposits of gold, tin, and other metals. ... The third area of need is data display and visualization, which are closely related to ...
Artisanal and Small-Scale Gold Mining Without Mercury ...,Nov 21, 2018 ... New Mercury-Free Mining Resource from UN ENvironment ... artisanal and small-scale gold mining, and calls upon nations to reduce, and where feasible ... An appropriate grain size can be achieved using screens or sieves.
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