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  2. Orogenic gold deposit - Wikipedia

    en.wikipedia.org/wiki/Orogenic_gold_deposit

    An orogenic gold deposit is a type of hydrothermal mineral deposit. More than 75% of the gold recovered by humans through history belongs to the class of orogenic gold deposits. [ 1 ] Rock structure is the primary control of orogenic gold mineralization at all scales, as it controls both the transport and deposition processes of the mineralized ...

  3. Ore genesis - Wikipedia

    en.wikipedia.org/wiki/Ore_genesis

    Lode gold deposits, also referred to as orogenic gold are generally high-grade, thin, vein and fault hosted. They are primarily made up of quartz veins also known as lodes or reefs, which contain either native gold or gold sulfides and tellurides. Lode gold deposits are usually hosted in basalt or in sediments known as turbidite, although when ...

  4. Grenville orogeny - Wikipedia

    en.wikipedia.org/wiki/Grenville_orogeny

    Grenville orogenic crust of mid-late Mesoproterozoic age (c. 1250—980 Ma) is found worldwide, but generally only events which occurred on the southern and eastern margins of Laurentia are recognized under the "Grenville" name. [1] These orogenic events are also known as the Kibaran orogeny in Africa and the Dalslandian orogeny in Western Europe.

  5. Homestake Mine (South Dakota) - Wikipedia

    en.wikipedia.org/wiki/Homestake_Mine_(South_Dakota)

    The Homestake Mine was a deep underground gold mine (8,000 feet or 2,438 m) located in Lead, South Dakota. Until it closed in 2002 it was the largest and deepest gold mine in the Western Hemisphere . The mine produced more than forty million troy ounces (43,900,000 oz; 1,240,000 kg) of gold during its lifetime. [1]

  6. Quartzburg, Idaho - Wikipedia

    en.wikipedia.org/wiki/Quartzburg,_Idaho

    Orogenic gold deposits (Böhlke, 1982) dominantly form in metamorphic rocks in the mid- to shallow crust (5–15 km depth), at or above the brittle-ductile transition, in compressional settings that facilitate transfer of hot gold-bearing fluids from deeper levels. The term “orogenic” is used because these deposits likely form in ...

  7. List of orogenies - Wikipedia

    en.wikipedia.org/wiki/List_of_orogenies

    Mauritanide Orogeny – Ancient orogen parallel to the west coast of Africa from Morocco to Guinea-Bissau. Mozambique Orogeny – Band in the Earth's crust from East Antarctica through East Africa up to the Arabian-Nubian Shield. Zambezian Orogeny – Area of mountain building now in southern Zambia and northern Zimbabwe.

  8. Iron oxide copper gold ore deposits - Wikipedia

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

    Classification. Iron oxide copper gold (IOCG) deposits are considered to be metasomatic expressions of large crustal-scale alteration events driven by intrusive activity. The deposit type was first recognised by discovery and study of the supergiant Olympic Dam copper-gold-uranium deposit (Olympic Dam mine), and South American examples.

  9. Central Asian Orogenic Belt - Wikipedia

    en.wikipedia.org/wiki/Central_Asian_Orogenic_Belt

    The Laoshankou Iron Oxide-Cu-Au deposit, which is located at the southwest of the Qinhe City, Xinjian, Northwest China, is considered as one of the most important high-quality copper and gold reserve in the Central Asian Orogenic Belt, with the deposit being hosted by the volcanic rocks formed during Middle Devonian. [30]