Chromite
Chromite is an oxide mineral belonging to the spinel group, a complex mineral containing magnesium, iron, aluminum, and Cr in varying proportions, depending on the deposit, …
Mineral resource of the month: Chromium | U.S. Geological Survey
June 7, 2018. Although chromium is a metal, it does not occur naturally in metallic form. Chromium can be found in many minerals, but the only economically significant chromium-bearing mineral is chromite. Chromite has been mined from four different deposit types: stratiform chromite, podiform chromite, placer chromite, and laterite deposits.
Chromitite layers indicate the existence of large, long-lived, …
They pointed out that the spatial arrangement of chromite in the UG1 (Figs. 1–3) is similar to what is observed in rocks where chromite co-precipitates with olivine or pyroxene 73.
Chromite ore beneficiation: prospects and challenges
Idiomorphic chromite is the only ore mineral appearing in economic quantities. The average content of the ore is 26% Cr 2 O 3 and the Cr/Fe ratio is 1.55. The Kemi chromium mine is an open-pit mine with a waste rock to ore ratio of 5.5:1. At Kemi, the ore from the mine contains 11% iron and 25.5% Cr 2 O 3.
Chromite
Basic Information. Chromite is a dark grey, metallic, oxide mineral. Due to its metallic luster and occasional magnetic properties, chromite is often mistaken for magnetite. Chromite can often be found in basic igneous rocks, and in the metamorphic and sedimentary rocks created by rocks containing chromite that were affected by weather.
Precipitation and dissolution of chromite by hydrothermal …
Chromite is a typical refractory igneous mineral, precipitated from mafic magmas at relatively high temperatures. Chromites commonly occur in sedimentary, metamorphic, and metasomatic rocks, where they are interpreted as relics of an igneous phase and serve as the source of Cr for low-temperature Cr-bearing minerals. We …
Chromite chemistry as petrogenetic indicator of altered
Chromite [(Mg, Fe 2+) Cr 2 O 4] is one of the end members of the spinel group, represented by the general formula AB 2 O 4.While it frequently occurs as an accessory mineral in mafic to ultramafic rocks, it only appears as a dominant mineral in chromitite (Irvine 1965; Rollinson et al. 2002).Because it is the first mineral to crystallise …
Chromite | Ores, Mining, Processing | Britannica
Chromite is commonly found as brittle masses in peridotites, serpentines, and other basic igneous and metamorphic rocks; an unusual occurrence is as a crystalline inclusion in diamond. The earliest worked deposits were those in the serpentine of the Bare Hills near Baltimore, Md., U.S.
Podiform Chromitites in the Luobusa Ophiolite (Southern …
The Luobusa ophiolite in the Indus—ladling Zjingbo suture of southern Tibet hosts the largest known chromite deposit in China. The podiform chromitites occur in a well-preserved mantle sequence consisting of harzburgite with abundant lenses of dunite. The harzburgites have relatively uniform bulk-rock compositions with mg-numbers …
Laterite covered mafic-ultramafic rocks: Potential target for chromite …
Exposed chromite deposits in the Sukinda belt, Odisha, India, have already been identified and exploited; but a large part of the area is covered by laterite and remains unexplored. As a case study to establish the feasibility of chromite exploration under laterite rocks, an integrated ground-based gravity, magnetic and very low frequency (VLF) - …
Chromium (Cr) Ore | Minerals, Formation, Deposits
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geologyscienceWhat color is chromite?Chromite is dark brown to black in color and can contain some magnesium and aluminum. Chromite is most commonly found as an accessory mineral in iron- and magnesium-rich igneous rocks or concentrated in sediments derived from them. It occurs as layers in a few igneous rocks that are especially rich in iron and magnesium.Chromite | Chromium Ore, Properties, Uses and Occurrence
geologyscienceIs chromite a chromium ore mineral?World chromite ore production. Chromium (Cr) ore minerals typically refer to the naturally occurring minerals that contain chromium in their composition. The most common chromium ore mineral is chromite, which is a dark, black to brownish-black mineral with the chemical formula FeCr2O4.Chromium (Cr) Ore | Minerals, Formation, Deposits
geologyscienceIs chromite a magnet?Due to its metallic luster and occasional magnetic properties, chromite is often mistaken for magnetite. Chromite can often be found in basic igneous rocks, and in the metamorphic and sedimentary rocks created by rocks containing chromite that were affected by weather. A particularly useful metal, chromium, can be extracted from chromite ore.Chromite
geophysics.earth.northwestern.eduFeedbackChromite | Chromium Ore, Properties, Uses and …
WEBChromite is most commonly found as an accessory mineral in iron- and magnesium-rich igneous rocks or concentrated in sediments …
Chromite ore beneficiation: prospects and challenges
Chromite is an important commercial chromium-bearing mineral. It is an oxide of chromium and iron (FeO, Cr 2 O 3, or FeCr 2 O 4 ). A complex mineral …
Stratiform chromite deposit model
A new descriptive stratiform chromite deposit model was prepared which will provide a framework for understanding the characteristics of stratiform chromite deposits worldwide. Previous stratiform chromite deposit models developed by the U.S. Geological Survey (USGS) have been referred to as Bushveld chromium, because the Bushveld Complex in …
Chromite-induced magnesium isotope fractionation during …
Chromite is the earliest crystallized phase during mafic magma evolution and occurs as the main accessory mineral phase in the Xiadong intrusive rocks. Its modal content is particularly high, up to 5%−20% in the dunite, whereas other rock types contain sparse or no chromite [32].
(PDF) Stratiform chromite deposit model
The main host rocks for the chromite are generally cumulate pyroxenites, such as feldspathic pyroxenite in the Bushveld Complex, or harzburgites (olivine cumulates) in the Stillwater Complex and Muskox intrusion. Typically, a layered mafic-ultramafic intrusion consists of two main sections: an ultramafic series and a mafic series. ...
CHROMITE (Iron Chromium Oxide)
Chromite is the most important ore of chromium from which it derives its name. Chromium is an important metal and has a wide range of industrial uses. Chromite forms in deep ultra-mafic magmas and is one of the first minerals to crystallize. It is because of this fact that chromite is found in some concentrated ore bodies.
(PDF) SERPENTINISATION OF ULTRAMAFIC …
Chromite layers and chromite-bearing ultamafic rocks exposed in the Byrapur area form a part of layered ultramafic-gabbro complex which is emplaced in to the Sargur group of Nuggihalli schist …
What is chromite (chrome) ore and where is it found
Chrome ore is found in basic and ultrabasic igneous rocks and in the metamorphic and sedimentary rocks that are produced when chromite-bearing rocks are altered by heat or weathering. There are two main types of chromite deposits: stratiform deposits and podiform deposits. Zimbabwe is the only country that contains notable chromite …
Chromite deposits of the north-central Zambales Range, …
Peridotite and gabbro form an intrusive complex which is exposed over an area about 35 km wide and 150 km long in the center of the Zambales Range of western Luzon. The Zambales Complex is remarkable for its total known resources, mined and still remaining, of about 15 million metric tons of chromite ore. Twenty percent of Free World production …
How Much Chromite Is Worth In 2024 (Expert Evaluation)
Chromite is a versatile mineral with many applications that extend far beyond its undeniable beauty. How much is Chromite worth. The chromite price per carat can vary significantly based on various factors such as quality, color, clarity, cut, and market demand. A chromite per carat ranges from $0.008 to $0.012.
Chromite: The mineral Chromite information and pictures
The Mineral chromite. Chromite, the principle ore of the element chromium, is a commercially valuable mineral. However, due to mining restrictions and the fact that Chromite is not commonly found in crystallized form, it is not well-represented in mineral collections. Chromite is isomorphous with the mineral Magnesiochromite and is easily ...
Peridotites, chromitites and diamonds in ophiolites
The combined effect of melt–rock interaction and melt mixing has been previously suggested to move the liquid into the chromite crystallization field, resulting in the formation of chromitite 24 ...
Chrome ore beneficiation challenges & opportunities – A …
Most of the chromite reserves in the world are concentrated in Africa and Asia followed by Europe, Australia and Brazil. 2. Sources of chromite. Chromium ore occurs exclusively in rocks formed by the intrusion and solidification of molten lava or magma which is very rich in the heavy, iron containing minerals such as pyroxenes and olivines.
Formation of Chromite Chains and Clusters in Igneous Rocks …
Chromite (and the closely related magnetite) phenocrysts in extrusive, glomeroporphyritic, mafic rocks commonly form clusters that appear in thin section as elongate chains ( Dick & Bryan, 1978; Bannister et al., 1988; Roeder et al., 2001; Godel et al., 2013) ( Fig. 1a and b ). Such chains may also be present as inclusions in olivine ...
Chromite
Important chromite mining countries are Kazakhstan, South Africa, Zimbabwe, and India. Chrome is needed for a variety of purposes, but it is mostly used to make stainless steel. Serpentinized ore from The Zhob Valley, Pakistan. Green is serpentine, black is chromite. This is a cumulate rock associated with ultramafic rocks. Width of sample is 6 cm.
Formation of Chromite Chains and Clusters in …
The Formation of Chromite Chains and Clusters in Igneous Rocks. Marian B Holness., Zoja Vukmanovic., Brian O'Driscoll. Journal of Petrology, Volume 64, Issue …
Chromite
Chromite, the only commercial source of chromium, is a spinel group mineral that occurs in ultramafic igneous rocks and further occurs exclusively in rocks formed by the intrusion and solidification of molten lava or magma, which is very rich in the heavy iron-containing minerals such as pyroxenes and olivine. In addition, it is also found in metamorphic …
Chromium
Chromium. Chromium (Cr) is a hard, bluish metallic element. The only ore of chromium is the mineral chromite and 99 percent of the world's chromite is found in southern Africa and Zimbabwe. Geologists estimate that there are about 11 billion tons of mineable chromite ore in the world, enough to supply the current demand for hundreds of years.
Chromite: Meaning, Properties, and Benefits You Should Know
Chromite Metaphysical Properties & Benefits. Chromite's main colors are black and silver. Black keeps you grounded and protected, while silver brings in intuition and emotional balance, as an energy conductor for physical, emotional, and spiritual well-being. It harmonizes with the Earth Star, Lunar Star, Solar Star, and Stellar Gateway Chakras.
Chromite | Earth Sciences Museum
Chromite is a cumulate mineral which is found in ultramafic portions of layered mafic intrusions or in serpentines and other metamorphic rocks derived from the alteration of …