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natural occurrence of iron ore

Iron ore - Wikipedia

Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in color from dark grey, bright yellow, or deep purple to rusty red. The iron is usually found in the form of magnetite (Fe 3O 4, 72.4% Fe), hematite (Fe 2O 3, 69.9% Fe), goethite (FeO(OH), 62.9% Fe), limonite (FeO(OH)n(H2O), 55% Fe), or siderite (FeCO3, 48.2% Fe). 2024年5月25日  Natural iron is a mixture of four stable isotopes: iron-56 (91.66 percent), iron-54 (5.82 percent), iron-57 (2.19 percent), and iron Iron Element, Occurrence, Uses, Properties,Earth's most important iron ore deposits are found in sedimentary rocks. They formed from chemical reactions that combined iron and oxygen in marine and fresh waters. The two most important minerals in these Iron Ore: Sedimentary Rock - Pictures, Definition

Iron Ore Statistics and Information U.S. Geological Survey

Iron ore is a mineral substance which, when heated in the presence of a reductant, will yield metallic iron (Fe). It almost always consists of iron oxides, the primary forms of which The principal ores of iron are hematite (ferric oxide, Fe 2 O 3) and limonite (ferric oxide trihydrate, Fe 2 O 3 3H 2 O). Other ores include siderite (ferrous carbonate, FeCO 3), iron: Natural Occurrence InfopleaseIron ores occur in igneous, metamorphic (transformed), or sedimentary rocks in a variety of geologic environments. Most are sedimentary, but many have been changed by Iron processing - Ores, Smelting, Refining Britannica

The Distribution of Iron in Nature SpringerLink

The most important iron-containing minerals are the oxides and sulfides. Hematite (red iron ore, Fe 2 O 3), magnetite (loadstone, Fe 3 O 4), and goethite (hydrous iron oxide, FeO 2 Sedimentary iron deposits, from which almost all iron is obtained, can therefore be viewed as one of the world’s great mineral treasures. There are two major types of deposit. The Mineral deposit - Iron Ore, Ore Bodies, Mining Britannica

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