• Mining Underground mining . Britannica

    (Longwall mining of coal is discussed in greater detail in coal mining: Underground mining.) In hard rocks, such as the gold and platinum bearing reefs of South.

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  • Sluicing . mining . Britannica

    Sluicing: hydraulic mining: moving the slurry is called sluicing. . In the hydraulic mining of gold the rebounding stream of water and mineral fragments is.

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  • Prospecting . mining . Britannica

    Mar 4, 2019 . Panning for gold and other heavy minerals in alluvium is still used for collecting geologic information, although it is now supported by.

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  • Ore deposit . geology . Britannica

    Ore deposit: mineral deposit: a profit is called an ore deposit, and in an ore deposit the assemblage of ore minerals plus gangue is called the ore. . Aerial view of the Nobles Nob gold mine, Northern Territory, Australia. . nickel briquettes.

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  • Placer mining . Britannica

    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.

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  • Chromium processing . Britannica

    Chromium processing, preparation of the ore for use in various products. .. The briquetted mixture is placed in a large vacuum furnace, which is heated by.

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  • Nickel processing . Britannica

    nickel briquettes . Later, miners in Saxony encountered what appeared to be a copper ore but found that processing it yielded only a . Some gold, silver, and the six platinum group metals also are present, and their recovery is important.

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  • Mining . Britannica

    Gold was one of the first metals utilized, being mined from streambeds of sand and gravel where it occurred as a pure metal because of its chemical stability.

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