placer mining

Englisch - Türkisch

Definition von placer mining im Englisch Türkisch wörterbuch: (isim)hirden eleyerek altın elde etme; nehirden eleyerek altın elde etme; plaser madenciliği

Englisch - Englisch

Definition von placer mining im Englisch Englisch wörterbuch: mining valuable minerals from a placer by washing or dredging; The obtaining of minerals from placers by washing or dredging.placer miner n. Oldest method of recovering gold from alluvial deposits. It takes advantage of gold's high density, which causes it to sink more rapidly from moving water than the lighter siliceous materials with which it is found. Panning, used by 19th-century miners, employed a pan in which a few handfuls of the gold-bearing soil or gravel and a large amount of water were placed; by swirling the pan's contents, the miner washed the siliceous material over the side, leaving the gold and heavy materials behind. Dredging is the most important placer-mining method today. Used worldwide is the bucket-ladder dredge, with its continuous chain of buckets rotating around a rigid adjustable frame called the ladder. In sluicing, a slightly sloping wooden trough called a box sluice, or a ditch cut in hard gravel or rock called a ground sluice, is used as a channel along which gold-bearing gravel is carried by a stream of water. Riffles placed transversely along the bottom of the sluice cause the water to eddy into small basins, retarding the current so that gold may settle

placer mining

Silbentrennung

pla·cer min·ing

pleysır maynîng

/ˈplāsər ˈmīnəɴɢ/ /ˈpleɪsɜr ˈmaɪnɪŋ/

Historie

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