how iron rock is form

Banded iron formation WikipediaBanded Iron Formation Western Australian Museum

A typical banded iron formation consists of repeated thin layers a few millimeters to a few centimeters in thickness of silver to black iron oxides either magnetite Fe 3 O 4 or hematite Fe 2 O 3 alternating with bands of iron poor shales and cherts often red in color of similar thickness and containing microbands sub millimeter of Banded Iron Formation Image copyright of WA Museum Most of the major iron deposits worldwide occur in rocks called banded iron formations or BIFs for short which are finely layered sedimentary rocks composed of alternating chert a form of quartz and iron oxide bands

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How to Identify Flint 8 Steps with Pictures wikiHowIron Ore Gemstones and Minerals Gem5

07 02 32 How to Identify Flint Flint also known as chert is a type of sedimentary rock that has many us It was once commonly used to form rudimentary tools like knives and spear tips Flint is often used by outdoorsmen to create sparks for a Pyrite Pyrite is an iron sulphide mineral with a cubic crystal system and is dimorphous with marcasite It occurs as cubic crystals with striated faces or in the form of pentagonal dodecahedra usually well crystallized either isolated or in small often well formed groups or as iron cross twins

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Iron Element Facts History Where It Is Found How It how iron rock is form imvusariskcoza

Iron is a brittle hard substance The most abundant of all metals its pure form rapidly corrodes from exposure to moist air and high temperatur Iron is also the fourth most common element Weathering is the breakdown of rock to form regolith releasing dissolved ions as oxidation whereby oxygen binds with the iron to form iron oxides rust A quick and dirty guide to mineral stability is to consider how complex the structure is

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igneous rock Characteristics Examples Formation how is iron ore formed Yahoo Answers

Igneous rock any of various crystalline or glassy rocks formed by the cooling and solidification of molten earth material Igneous rocks constitute one of the three principal classes of rocks the others being metamorphic and sedimentary 01 17 32 In order for this BIF to turn into into iron ore it has to undergo a process known as super gene enrichment where the silica within the rock is either replaced by a low grade iron ore mineral known as goethite or is merely dissolved away As BIF is 30 40 silica the rock unit it forms in shrinks considerably once the silica is dissolved A 100m section of BIF will form about 60m of iron ore

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How Iron Pyrite is Formed Actforlibrariorg4 Ways to Make Iron Oxide wikiHow

Metamorphic rocks are formed by heat and pressure and pyrite could be formed as part of this process or may form as a replacement mineral within the rock In sedimentary rocks pyrite is usually found as a replacement mineral when the iron and sulphur that is present in the sediments chemically combine to replace the original chemical composition of organic matter that is in the process of 10 13 32 Since iron II in its pure form is rare under atmospheric conditions you will likely need to use an iron II salt Iron sulphate iron II chloride and iron II phosphate are relatively common options Iron sulphate is used in gardening and can be found at most garden supply stor

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HOW TO TELL THE DIFFERENCE BETWEEN GOLD and PYRITE How Is Iron Extracted From the Earth Reference

07 05 32 Is it Gold Know if you got GOLD or Iron Pyrite Fools Gold Simple way How to test for Gold so you can tell tell if you got AU or Iron SulfideIron ores in the form of hematite ferrous oxide and magnetite are removed from the earth through mining The use of heavy mining equipment is necessary to dig out large pits in an area with a large deposit of iron ore however because iron does not occur naturally it is necessary to use a blast

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Earth Science for Kids Rocks Rock Cycle and FormationSedimentary rock Wikipedia

The Rock Cycle Rocks are constantly changing in what is called the rock cycle It takes millions of years for rocks to change Here is an example of the rock cycle describing how a rock can change from igneous to sedimentary to metamorphic over timeThe color of a sedimentary rock is often mostly determined by iron an element with two major oxides iron II oxide and iron III oxide Iron II oxide FeO only forms under low oxygen anoxic circumstances and gives the rock a grey or greenish colour

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Banded Iron Formation University of OregonIron Ore HowStuffWorks

Banded Iron Formation Banded Iron formations occur in Proterozoic rocks ranging in age from 18 to 25 billion years old They are composed of alternating layers of iron The majority of Earth s iron however exists in iron ore Mined right out of the ground raw ore is mix of ore proper and loose earth called gangue The ore proper can usually be separated by crushing the raw ore and simply washing away the lighter soil

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Historical Geology/Banded iron formations Wikibooks Minerals Rocks Rock Forming Processes

BIFs defined Banded iron formations or BIFs are sedimentary rocks consisting of alternating bands iron rich sediment typically hematite Fe 2 O 3 and magnetite Fe 3 O 4 and iron poor sediment typically chert the size of the bands ranges from less than a millimeter to more than a meter in thicknessIf these rocks form at very shallow depths they may be called hypabyssal or subvolcanic rocks and we may also see porphyritic textures eg dykes and sills If they form at considerable depth they are called plutonic rocks and the respective rock bodies may be called stocks or batholiths or plutons

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Iron Ore Mining ArtifactsThe Formation of Iron Australian Mines Atlas

Hematite iron is typically rarer than magnetite bearing banded iron formations or other rocks which form its main source or protolith rock but it is considerably cheaper and easier to beneficiate the hematite ores and requires considerably less energy to crush and grindThe National Mineral and Fossil Collection contains over 300 000 mineral meteorite fossil and rock thin section specimens with around 700 on permanent display in the foyer at Geoscience Australia

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Iron rich sedimentary rocks WikipediaSedimentary rock Wikipedia

How Does Iron Ore Form Nearly all of Earth s major iron ore deposits are in rocks that formed over 18 billion years ago At that time Earth s oceans contained abundant dissolved iron and almost no The color of a sedimentary rock is often mostly determined by iron an element with two major oxides iron II oxide and iron III oxide Iron II oxide FeO only forms under low oxygen anoxic circumstances and gives the rock a grey or greenish colour

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What Happens When Iron Reacts With Oxygen ReferenceSedimentary Rocks Lesson 13 Oregon State University

Iron rusts when it comes in contact with oxygen and water It rusts faster in acid rain and salty water Both oxygen and water are necessary for rusting which is an oxidation reaction When iron reacts with oxygen and water it forms hydrated iron oxide this is what people see as rust OxidationThe cementing agents that fill the spaces to form the solid rock conglomerate are silica calcite or iron oxid Notice in the photo above the rounded rock particles in the conglomerate These rounded particles make conglomerate different from the next rock you are about to study breccia

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The Chemical Reaction That Causes Rust ThoughtCoIron Georgia State University

Rust is the common name for iron oxide The most familiar form of rust is the reddish coating that forms flakes on iron and steel Fe 2 O 3 but rust also comes in Zinc and iron form the sulfide wurtzite Zn Fe S A sulfate mineral of iron and potassium is jarosite Beudantite is a mineral containing iron and lead along with sulfate and arsenate groups PbFe 3 AsO 4 SO 4 2 OH 6

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Geology rocks and minerals University of AucklandHow Are Minerals Formed Reference

Rhyolite Rhyolite is a felsic extrusive rock Due to the high silica content rhyolite lava is very viscous It flows slowly like tooth paste squeezed out of a tube and tends to pile up and form lava domIgneous rocks come from magma underneath the surface of the earth This magma is mostly silicon and contains other elements such as oxygen aluminum calcium sodium potassium iron and magnesium When magma cools these rocks harden after water and carbon dioxide are removed from the minerals

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