(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. ...
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Compositions and tectonic settings of chromite
Chromite deposits in Archean greenstones resemble the ophiolite ores in respect to their peridotite host rocks, shapes, and intense deformation but are recognizably cumulate ores. They are hosted in large ultramafic-mafic sill-like complexes in simatic volcanic sequences, suggesting that the Early Archean ocean crust may have been more …
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Application of geological methods for prospecting of podiform chromite
The Khoy ophiolite covers an extensive area in the northwest of Iran along the Iran-Turkey border. This ophiolite zone comprises one of the most promising areas for prospecting of chromite deposits as a result of extensive outcrops of ultramafic rocks. The Kochuk area is located in the western domain of the Khoy ophiolite (Fig. 1).
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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, …
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Chromite Mineral Data
Physical Properties of Chromite : Cleavage: None : Color: Black, Brownish black. Density: 4.5 - 5.09, Average = 4.79 ... Massive - Granular - Common texture observed in granite and other igneous rock. Habit: Nuggets - Irregular lumps produced by stream transport of malleable metals. Hardness: 5.5 - Knife Blade : Luminescence: Non-fluorescent. ...
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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 ...
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Chromite and other mineral deposits in serpentine rocks of …
Exploratory work in several of the mines and placer deposits during World War I produced about 1,500 long tons of chromite ore, 920 tons of which was sold. Most of the chromite from Maryland and Pennsylvania was used to manufacture chemical compounds, pigments, and dyes before metallurgical and refractory uses for chromite were developed.
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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.
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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 …
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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 …
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The Formation of Chromite Chains and Clusters in Igneous Rocks
Comparison with examples of clustered chromite grains in extrusive rocks suggests that aggregation by synneusis is a widespread magmatic process. The 'chicken-wire' texture formed by clustered chromite grains commonly found in olivine-rich cumulates is argued to also be formed by gravitational settling, with the possible exception of ...
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Chromite Deposits: Mineralogy, Petrology and Genesis
A chromite occurrence called the Sabantuy paleoplacer was discovered in the Southern Pre-Ural region, at the east edge of the East-European Platform in the transitional zone to the Ural Foredeep. A ca. 1 m-thick chromite-bearing horizon is traced at a depth of 0.7–1.5 m from the earth's surface for the area of ca. 15,000 m 2.
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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.
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(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 …
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Chromite: The only mineral ore of chromium metal
It occurs 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. Chromite is important because it is the only economic ore of chromium, an essential …
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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) - …
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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.
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What Is Chromite | HAIXU
What is Chromite? Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr2O4). It is dark gray to black in color with a metallic to submetallic luster and high specific gravity. It occurs in basic and ultrabasic igneous rocks and in the metamorphic and sedimentary rocks that are produced when chromite-bearing rocks …
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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 ...
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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.
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The giant chromite deposits at Kempirsai, Urals: constraints …
The investigation of stable and radiogenic isotopes and of platinum-group (PGE) and rare earth elements (REE) in chromitites and associated ultramafic rocks of the Kempirsai Massif, southern Urals, gives strong evidence for a multistage formation of giant ophiolitic-podiform chromite deposits present in the southeastern part of the massif. The …
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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.
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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.
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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 …
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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 …
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Chromite: Mineral information, data and localities.
Chromite is the most important chromium ore mineral. It forms a complete solid solution series with many other members of the group, eg. in the Chromite-Hercynite Series, …
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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 …
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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].
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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.
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Chromite
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. …
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