Name: Placer Mining
SKU: 67131243
Price: 142.34 EUR
Availability: InStock
ISBN: 9786130358815

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Publisher

Betascript Publishing

Language

English

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Paperback

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ISBN13

9786130358815

Placer Mining

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Synopsis "Placer Mining"

High Quality Content by WIKIPEDIA articles! Placer mining is 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 pressure (hydraulic mining), surface excavating equipment or tunneling equipment. The name derives from Spanish, placer, meaning "sandbank." It refers to mining the precious metal deposits (particularly gold and gemstones) found in alluvial deposits?deposits of sand and gravel in modern or ancient stream beds. The metal or gemstones, having been moved by stream flow from an original source such as a vein, is typically only a minuscule portion of the total deposit. The containing material may be too loose to safely mine by tunneling. Where water under pressure is available, it may be used to mine, move, and separate the precious material from the deposit.

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