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  2. Iron ore - Wikipedia

    en.wikipedia.org/wiki/Iron_ore

    Elemental iron is virtually absent on the Earth's surface except as iron-nickel alloys from meteorites and very rare forms of deep mantle xenoliths.Although iron is the fourth most abundant element in Earth's crust, composing about 5% by weight, [4] the vast majority is bound in silicate or, more rarely, carbonate minerals, and smelting pure iron from these minerals would require a prohibitive ...

  3. Iron oxide copper gold ore deposits - Wikipedia

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

    Marcona Mine 1,400 million tonnes iron ore; Pampa de Pongo 1,000 million tonnes 75% magnetite; Mina Justa copper-gold deposit [14] Some authors (e.g., Skirrow et al. 2004) consider the iron ore deposits of Kiruna, Sweden as being IOCG deposits. Similar styles of fault-hosted magnetite-hematite breccias with minor copper-gold mineralisation and ...

  4. Siderite - Wikipedia

    en.wikipedia.org/wiki/Siderite

    Its name comes from the Ancient Greek word σίδηρος (sídēros), meaning "iron". A valuable iron ore , it consists of 48% iron and lacks sulfur and phosphorus . Zinc , magnesium , and manganese commonly substitute for the iron, resulting in the siderite- smithsonite , siderite- magnesite , and siderite- rhodochrosite solid solution series.

  5. Category:Iron ores - Wikipedia

    en.wikipedia.org/wiki/Category:Iron_ores

    Iron ore deposits (15 P) Pages in category "Iron ores" The following 14 pages are in this category, out of 14 total. This list may not reflect recent changes. ...

  6. Iron-rich sedimentary rocks - Wikipedia

    en.wikipedia.org/wiki/Iron-rich_sedimentary_rocks

    Iron formations can be divided into subdivisions known as: banded iron formations (BIFs) and granular iron formations (GIFs). [ 3 ] The above classification scheme is the most commonly used and accepted, though sometimes an older system is used which divides iron-rich sedimentary rocks into three categories: bog iron deposits , ironstones , and ...

  7. List of copper ores - Wikipedia

    en.wikipedia.org/wiki/List_of_copper_ores

    Name Formula % Copper when pure Chalcopyrite: CuFeS 2: 34.5 Chalcocite: Cu 2 S: 79.8 Covellite: CuS: 66.5 Bornite: 2Cu 2 S·CuS·FeS 63.3 Tetrahedrite: Cu 3 SbS 3 + x ...

  8. Channel-iron deposits - Wikipedia

    en.wikipedia.org/wiki/Channel-iron_deposits

    Although channel iron deposits are typically low-grade at 53% to 57% Fe in-situ, they are composed of goethite-limonite which are hydrated iron oxide species. Ore typically contains around 8% to 12% water, and <5% SiO 2, and <3% Al 2 O 3. The hydrous iron oxides can be calcined, and the CID ore on a volatile-free basis is around 63% Fe or more.

  9. Taconite - Wikipedia

    en.wikipedia.org/wiki/Taconite

    In the late 19th and early 20th centuries, the United States was mining such an abundance of iron ore of high quality that taconite was considered an uneconomic waste product. By the end of World War II much of the high-grade iron ore in the United States had been exhausted, so taconite became valued as a new source of the metal. [2]

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