Mining in Manitoba |
Placer Mining |
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Placer deposits are concentrations of heavy minerals, usually within loose alluvium that can easily be excavated and washed. Placer minerals such as gold, tin, and tungsten minerals, are of relatively high value, but the value of the placer gravel itself may be very low, often less than a dollar per cubic yard. For deposits of such low grade to be worked they must be near water, on or near the surface of the ground, and should be only loosely consolidated so that drilling and blasting are not necessary. The bulk of placer mining falls into three groups-- panning and sluicing / hydraulicking, and dredging.
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