* Iron Ore: This is the primary source of iron for mining. It consists of rocks like:
* Hematite (Fe₂O₃): This is the most common iron ore, containing about 70% iron.
* Magnetite (Fe₃O₄): This ore is magnetic and contains around 72% iron.
* Goethite (FeO(OH)): A hydrated form of iron oxide, commonly found in sedimentary deposits.
* Siderite (FeCO₃): A carbonate mineral, often containing significant amounts of iron.
* Igneous Rocks: Iron is also found in many igneous rocks, including:
* Basalt: A dark-colored, fine-grained volcanic rock rich in iron and magnesium.
* Gabbro: A coarse-grained, dark-colored igneous rock similar in composition to basalt.
* Metamorphic Rocks: Iron can also be found in metamorphic rocks, which are formed from existing rocks under high pressure and temperature. Examples include:
* Schist: A metamorphic rock with a foliated texture.
* Gneiss: A metamorphic rock with a banded texture.
It's important to note that the presence and concentration of iron in rocks can vary greatly. While iron ore is specifically mined for its iron content, other rock types contain iron as a minor or trace element.
