What does placer mining mean?
Definitions for placer mining
placer min·ing
This dictionary definitions page includes all the possible meanings, example usage and translations of the word placer mining.
Princeton's WordNet
placer miningnoun
mining valuable minerals from a placer by washing or dredging
Wikipedia
Placer mining
Placer mining is the mining of stream bed (alluvial) deposits for minerals. This may be done by open-pit (also called open-cast mining) or by various surface excavating equipment or tunnelling 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 modern or ancient stream beds, or occasionally glacial deposits. The metal or gemstones, having been moved by stream flow from an original source such as a vein, are typically only a minuscule portion of the total deposit. Since gems and heavy metals like gold are considerably denser than sand, they tend to accumulate at the base of placer deposits. It is important to note that placer deposits can be as young as a few years old, such as the Canadian Queen Charlotte beach gold placer deposits, or billions of years old like the Elliott Lake uranium paleoplacer within the Huronian Supergroup in Canada.The containing material in an alluvial placer mine may be too loose to safely mine by tunnelling, though it is possible where the ground is permanently frozen. Where water under pressure is available, it may be used to mine, move, and separate the precious material from the deposit, a method known as hydraulic mining, hydraulic sluicing or hydraulicking.
ChatGPT
placer mining
Placer mining is a method of extracting valuable minerals from deposits of sand, gravel or other alluvial material by washing or dredging. This technique is often used for materials such as gold, platinum or diamonds that have been eroded from their original location and deposited elsewhere by water or weather processes. Specific methods of placer mining may include panning, sluicing, hydraulic mining, or dredging.
Wikidata
Placer mining
Placer mining is the mining of alluvial deposits for minerals. This may be done by open-pit or by various surface excavating equipment or tunneling equipment. Placer mining is frequently used for precious metal deposits and gemstones, both of which are often found in alluvial deposits—deposits of sand and gravel in modern or ancient stream beds, or occasionally glacial deposits. 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. Since gems and heavy metals like gold are considerably more dense than sand, they tend to accumulate at the base of placer deposits. The containing material may be too loose to safely mine by tunneling, though it is possible where the ground is permanently frozen. Where water under pressure is available, it may be used to mine, move, and separate the precious material from the deposit, a method known as hydraulic mining, hydraulic sluicing or hydraulicking.
Matched Categories
Numerology
Chaldean Numerology
The numerical value of placer mining in Chaldean Numerology is: 5
Pythagorean Numerology
The numerical value of placer mining in Pythagorean Numerology is: 4
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"placer mining." Definitions.net. STANDS4 LLC, 2024. Web. 26 Apr. 2024. <https://www.definitions.net/definition/placer+mining>.
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