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what kind of stones have iron ore

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what kind of stones have iron ore

  • Iron-rich sedimentary rocks - Wikipedia

    Iron-rich sedimentary rocks are sedimentary rocks which contain 15 wt.% or more iron. However, most sedimentary rocks contain iron in varying degrees. The majority of these rocks were deposited during specific geologic time periods: The Precambrian (3800 to 539 million years ago), the early Paleozoic (539 to 419 million years ago), and the middle to late Mesozoic (205 to 66 million years agBanded iron formations may contain iron in carbonates (siderite or ankerite) or silicates (minnesotaite, greenalite, or grunerite), but in those mined as iron ores, oxides (magnetite or hematite) are the principal iron mineral.Iron ore - Wikipedia2024年5月3日  Two major types of iron-rich sedimentary rocks are recognized: (1) iron formation, or banded iron formation —regionally extensive, locally thick sequences Sedimentary rock - Iron-Rich, Clastic, Chemical Britannica

  • Ironstones and iron formations SpringerLink

    Ironstones are generally less siliceous, more aluminous, not laminated, smaller, and Phanerozoic in age. This distinction highlights time-related changes which constitute one An ironstone (76) is a sedimentary rock that contains more than 15% iron, which may be present as variable proportions of iron-bearing minerals such as goethite, siderite, and Ironstone - an overview ScienceDirect TopicsHematite is the world’s most important ore of iron. Although magnetite contains a higher percentage of iron and is easier to process, hematite is the leading ore because it is more abundant and present in deposits in many Hematite: A primary ore of iron and a pigment mineral

  • Mineral deposit - Iron Ore, Ore Bodies, Mining Britannica

    There are two major types of deposit. The first, and by far the most important, is banded iron formations (BIFs), so called because they are finely layered alternations of cherty silica

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