placer mining


placer mining
placer mining [plas′ər ]
n.
mining of placer deposits by washing, dredging, or other hydraulic methods

English World dictionary. . 2014.

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  • Placer mining — (pronounced plass er ) refers to the mining of alluvial deposits for minerals. This may be done by open pit (also called open cast mining) or by various forms of tunneling into ancient riverbeds. Excavation may be accomplished using water… …   Wikipedia

  • placer mining — ☆ placer mining [plas′ər ] n. mining of placer deposits by washing, dredging, or other hydraulic methods * * * Oldest method of recovering gold from alluvial deposits. It takes advantage of gold s high density, which causes it to sink more… …   Universalium

  • placer mining — noun mining valuable minerals from a placer by washing or dredging • Hypernyms: ↑mining, ↑excavation * * * noun : the process of extracting minerals from a placer especially by washing, dredging, or hydraulic mining * * * placer mining, the… …   Useful english dictionary

  • placer mining — Taking the soft earthy matter in which the particles of mineral are loosely mingled, and, by filtration, separating the one from the other. Reynolds v Iron Silver Mining Co. 116 US 687, 695, 29 L Ed 774, 777, 6 S Ct 601 …   Ballentine's law dictionary

  • Placer, Surigao del Norte — Placer is a 4th class municipality in the province of Surigao del Norte, Philippines. According to the 2000 census, it has a population of 21,542 people in 4,237 households.BarangaysPlacer is politically subdivided into 20 barangays. * Amoslog *… …   Wikipedia

  • Placer — may refer to one of the following:*Placer deposit *Placer sheep *Placer miningGeographical names: * Placer, Masbate, Philippines * Placer, Surigao del Norte, Philippines * Placer County, California, United States …   Wikipedia

  • mining — /muy ning/, n. 1. the act, process, or industry of extracting ores, coal, etc., from mines. 2. the laying of explosive mines. [1250 1300; ME: undermining (walls in an attack); see MINE2, ING1] * * * I Excavation of materials from the Earth s… …   Universalium

  • Mining — This article is about the extraction of geological materials from the Earth. For the municipality in Austria, see Mining, Austria. For the siege tactic, see Mining (military). For name of the Chinese emperor, see Daoguang Emperor. Simplified… …   Wikipedia

  • Placer County, California — Coordinates: 39°04′N 120°44′W / 39.06°N 120.73°W / 39.06; 120.73 …   Wikipedia

  • Mining methods of the Klondike Gold Rush — See also: Klondike Gold Rush, Mining Contents 1 During the Klondike Gold Rush (1896 1910) 1.1 Methods of bringing out the gold 1.1.1 Underground mining …   Wikipedia