Placer mining - WikipediaPlacer mining is the mining of stream bed (alluvial) deposits for minerals. .. in Folsom, California. Large-scale sifting of placer gold from large volumes of alluvial deposits can be done by use of mechanical dredges.placer gold scale,What is Placer Gold Mining? - Yukon - Charley Rivers National .Yukon placer miner and cook John Rentfro takes a break from shoveling gravel . to capture as much gold as possible, dredge operators and small-scale placer.
placer gold scale