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  2. Mexico And El Salvador Ponder Different Mining Stances - AOL

    www.aol.com/mexico-el-salvador-ponder-different...

    Open-pit mining accounts for 60% of the country's mining production value and is critical for extracting key resources like gold, silver, copper and strategic minerals like lithium.

  3. Open-pit mining - Wikipedia

    en.wikipedia.org/wiki/Open-pit_mining

    Open-pit mining, also known as open-cast or open-cut mining and in larger contexts mega-mining, [1] is a surface mining technique that extracts rock or minerals from the earth. Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface where the overburden is relatively thin. In contrast, deeper mineral ...

  4. Surface mining - Wikipedia

    en.wikipedia.org/wiki/Surface_mining

    The Siilinjärvi carbonatite complex, [1] an open-pit mine owned by Yara International, in Siilinjärvi, Finland Coal strip mine in Wyoming. Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the ...

  5. Mountain Pass Rare Earth Mine - Wikipedia

    en.wikipedia.org/wiki/Mountain_Pass_rare_earth_mine

    The Mountain Pass Rare Earth Mine and Processing Facility, owned by MP Materials, is an open-pit mine of rare-earth elements on the south flank of the Clark Mountain Range in California, 53 miles (85 km) southwest of Las Vegas, Nevada. In 2020 the mine supplied 15.8% of the world's rare-earth production.

  6. Proposal to ban open-pit mining advances in Mexican Congress

    www.aol.com/news/proposal-ban-open-pit-mining...

    The Mexican Mining Chamber (Camimex) opposes the ban on open-pit mining, saying such a prohibition would cause a 1% contraction in the country's GDP and threaten some 200,000 jobs.

  7. Gold cyanidation ban - Wikipedia

    en.wikipedia.org/wiki/Gold_cyanidation_ban

    In 1998 Mono County in California effectively banned the usage of cyanide and other chemicals for mining or processing ore through a county ordinance., The US state of Montana banned open pit heap leaching and vat leaching using cyanide for gold mining following a citizen's initiative, Initiative 137, proposed by the Montana Environmental Information Center that was approved through a ...

  8. Placer mining - Wikipedia

    en.wikipedia.org/wiki/Placer_mining

    This may be done by open-pit 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 modern or ancient stream beds , or occasionally glacial deposits.

  9. Environmental impact of iron ore mining - Wikipedia

    en.wikipedia.org/wiki/Environmental_impact_of...

    Once a mine closes, mining facilities that occupy a small area of the disturbed land can either be salvaged or town down. [13] The main visual and aesthetic impacts of mining are the open pits and waste rock disposal areas. Open-pit mining disturbs larger areas than underground mining making the visual impacts much greater. [13]