Definition of placer mining. i. The extraction of heavy mineral from a placer deposit by concentration in running water. It includes ground sluicing, panning, shoveling gravel into a sluice, scraping by power scraper and excavation by dragline, dredge or other mechanized equipment.

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Unlike hardrock mining, which extracts veins of precious minerals from solid rock, placer mining is the practice of separating heavily eroded minerals like gold from sand or gravel. The word placer is thought to have come from Catalan and Spanish, meaning a shoal or sand bar. The word entered the American vocabulary during the 1848 California ...

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Unlike hardrock mining, which extracts veins of precious minerals from solid rock, placer mining is the practice of separating heavily eroded minerals like gold from sand or gravel. The word placer is thought to have come from Catalan and …

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Definition of placer mining in the Definitions dictionary. Meaning of placer mining. What does placer mining mean? Information and translations of placer mining in the most comprehensive dictionary definitions resource on the web.

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Define placer mining. placer mining synonyms, placer mining pronunciation, placer mining translation, English dictionary definition of placer mining. n. The obtaining of minerals from placers by washing or dredging. placer miner n.

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Placer mining definition: mining of placer deposits by washing, dredging, or other hydraulic methods | Meaning, pronunciation, translations and examples

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mining. (mi'ning) [ME] 1. The extraction of useful information from a database. Synonym: data mining. 2. The extraction from the earth of materials with industrial value, such as coal, silver, or gold. Miners are exposed to various occupational disorders, including respiratory diseases (e.g., pneumoconiosis), allergies, and traumatic injuries.

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placer mining, ancient method of using water to excavate, transport, concentrate, and recover heavy minerals from alluvial or placer deposits.Examples of deposits mined by means of this technique are the gold-bearing sands and gravel that settle out from rapidly moving streams and rivers at points where the current slows down.

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Placer mining / ˈ p l æ s ər / is the mining of stream bed deposits for minerals.This may be done by open-pit (also called open-cast mining) or by various surface excavating equipment or tunneling equipment.. Placer mining is frequently used for precious metal deposits (particularly gold) and gemstones, both of which are often found in alluvial deposits—deposits of sand and gravel in ...

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What does placer-mining mean? The obtaining of minerals from placers by washing or dredging. (noun)

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Placer Mining vs. Lode Mining. Lode mining, also known as hard rock mining, is the process of extracting gold from traditional veins of ore that are embedded within rocks and other minerals. To extract gold from lode deposits, miners usually blast, mill, …

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Placer definition, a surficial mineral deposit formed by the concentration of small particles of heavy minerals, as gold, rutile, or platinum, in gravel or small sands. See more.

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What is a Placer Claim? Placer claims are defined as "...including all forms of deposit, excepting veins of quartz, or other rock in-place." In other words every deposit, not located with a lode claim, should be appropriated by a placer location. Placer claims, where practicable, are located by legal subdivision (aliquot part and complete lots).

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Placer mining definition is - the process of extracting minerals from a placer especially by washing, dredging, or hydraulic mining.

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Emma G. Placer mining is commonly used to recover gold. Placer mining is a group of mining methods that use water to separate valuable minerals or ores from the surrounding sediment. It can be used to recover platinum, tin, and diamonds, but most commonly gold.A very crude form of placer mining was used by gold prospectors during the California gold rush in the mid 1800s.

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