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  2. Corrupted Blood incident - Wikipedia

    en.wikipedia.org/wiki/Corrupted_Blood_incident

    The Corrupted Blood debuff being spread among characters in Ironforge, one of World of Warcraft's in-game cities. The Corrupted Blood incident (also known as the World of Warcraft pandemic) [1] [2] took place between September 13 and October 8, 2005, in World of Warcraft, a massively multiplayer online role-playing game (MMORPG) developed by Blizzard Entertainment.

  3. Iron oxide copper gold ore deposits - Wikipedia

    en.wikipedia.org/wiki/Iron_oxide_copper_gold_ore...

    The gold contents of all deposits averages 0.41 g/t Au, with the majority of worldwide deposits averaging less than 1 g/t Au. [2] The occurrence of native gold mineralization. Example from Kalgoorlie Australia. The contents of gold can appear in three different forms in these deposits: [2] Native gold; Electrum; Gold–bismuth–antimony ...

  4. Gold mining - Wikipedia

    en.wikipedia.org/wiki/Gold_mining

    Gold mining can significantly alter the natural environment. Gold mining activities in tropical forests are increasingly causing deforestation along rivers and in remote areas rich in biodiversity. [73] [74] Mining has increased rainforest loss up to 70 km beyond lease boundaries, causing nearly 11,670 km 2 of deforestation between 2005 to 2015 ...

  5. Copper extraction - Wikipedia

    en.wikipedia.org/wiki/Copper_extraction

    One prevalent form of copper concentrate contains gold and silver, like the one produced by Bougainville Copper Limited from the Panguna mine from the early 1970s to the late 1980s. [ 54 ] The typical contract for a miner is denominated against the London Metal Exchange price, minus the TC-RCs and any applicable penalties or credits.

  6. Heap leaching - Wikipedia

    en.wikipedia.org/wiki/Heap_leaching

    Similar to in situ mining, heap leach mining differs in that it places ore on a liner, then adds the chemicals via drip systems to the ore, whereas in situ mining lacks these liners and pulls pregnant solution up to obtain the minerals. Heap leaching is widely used in modern large-scale mining operations as it produces the desired concentrates ...

  7. De re metallica - Wikipedia

    en.wikipedia.org/wiki/De_re_metallica

    De re metallica (Latin for On the Nature of Metals [Minerals]) is a book in Latin cataloguing the state of the art of mining, refining, and smelting metals, published a year posthumously in 1556 due to a delay in preparing woodcuts for the text.

  8. Gold parting - Wikipedia

    en.wikipedia.org/wiki/Gold_parting

    Gold quality was increased at the surface by 80–95% gold compared to 64–75% gold at the interior found in Nahal Qanah Cave dated to the 4th millennium BC. Further evidence is from three gold chisels from the 3rd Millennium BC royal cemetery at Ur that had a surface of high gold (83%), low silver (9%) and copper (8%) compared with an ...

  9. Rocker box - Wikipedia

    en.wikipedia.org/wiki/Rocker_box

    A rocker box (also known as a cradle or a big box) is a gold mining implement for separating alluvial placer gold from sand and gravel which was used in placer mining in the 19th century. It consists of a high-sided box, which is open on one end and on top, [ 1 ] and was placed on rockers .