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Inquire NowMining methods are traditionally grouped into open pit and underground mining. This subdivision will be followed in this chapter. In addition, a brief introduction is made to unconventional mining methods, including in-situ leach (ISL) and dredging of unconsolidated sediments.
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Inquire NowThe deposits of these materials are generally near the surface of the Earth and in wet areas. The locations are suitable for open pit mining and dredging operations. Open pit mining is performed with power shovels, front end loaders and conveyors. Dredging involves bucket-dredges and suction equipment mounted on barges.
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Inquire NowDredging The most important placer-mining method today, this involves the use of a floating boat or barge with either a series of buckets to scoop gravel, or a suctioning apparatus to vacuum gravel from the bottom of a creek or river.
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Inquire NowWith today's high wages and employment opportunities, the deposits remaining are far too low grade to be worked on a sustained economic basis. The gold pan is now used mainly as a tool in prospecting and exploration of low-grade placer deposits being considered for bulk mining methods such as dredging.
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