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Stratiform chromite deposit model

Stratiform chromite deposits are primarily hosted by peridotites, harzburgites, dunites, pyroxenites, troctolites, and anorthosites. Although metamorphism may have altered the …

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Chromite Deposits

The largest exploitable deposits of chromite occur in South Africa and Zimbabwe, with significant deposits in several other countries such as Finland, Kazakhstan and Turkey. Only 31,250 tons of chromite was produced in North America during 2012, which represented less than 0.13% of the more than 24.5 million tons of chromite produced ...

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CHROMITE Indian Minerals Yearbook 2020

the total reserves/resources of chromite in the country as on 1.4.2015 has been estimated at 344 million tonnes with 102 million tonnes as "Reserves" (30%) and 242 million tonnes as "Remaining Resources" (70%). More than 96% resources of chromite are located in Odisha, mostly in Jajpur, Kendujhar and Dhenkanal districts. Minor deposits

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Chromite Deposits

Chromite is a dark dull mineral that forms in igneous environments and is the primary commercial chromium ore. In 1798, Lowitz and Klaproth independently discovered chromium in samples of …

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Ontario Ring of Fire's Astonishing World-Class Mineral Potential …

The massive chromite deposit in the Ring of Fire follows a 12 km strike-length. Each mining company seems to have a portion of this deposit, which remains to be fully explored. ... and in many remote locations in Canada and abroad. "The Ring of Fire represents a wonderful exploration opportunity for a host of mineral deposits," Coutts said ...

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Origin of podiform chromite deposits by multistage melting…

Minute grains of chromite are suspended in the upward-moving magmas as they migrate through the overlying metasomatized mantle wedge. Such chromite-bearing magmas eventually deposit chromite in magma conduits in the uppermost mantle close to the Moho where the upward flow changes from vertical to subhorizontal and velocity is greatly reduced.

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Top 5 Chromium-producing Countries | INN

Here's a brief overview of last year's five top chromium-producing countries, according to data from the US Geological Survey's most recent report on chromium. All in all, …

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Experimental Study of the Effect of Pressure on the …

Abstract. Despite extensive research on massive chromitites, the mechanism(s) that form such anomalous chromite segregations remains uncertain. Recent work that considered a theoretical parental melt to the Critical Zone of the Bushveld Complex applied the MELTS thermodynamic model to propose that reduction of pressure upon magma ascent shifts the …

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Occurrence and Characteristics of Chromite Deposits—Eastern Bushveld

The chromite deposits of the eastern Bushveld Complex occur in the Critical Zone, a layered pile consisting mainly of pyroxenite, norite, and anorthosite, with minor gabbro, dunite, and harzburgite. With probable reserves in excess of one billion tons, the deposits are among the major mineral resources of the world.

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Prospecting for ophiolite-type chromite deposit in Sartohay, …

In the aspect of ophiolite-type chromitite prospecting, a lot of research has been conducted by scholars. Li and Li (1993) applied the four-dimensional dynamic metallogenic theory to study the Luobusa chromite deposit in Tibet, and the relationship between different levels of tectonism and mineralization is explored. Wang et al. (2010) found that the occurrence of …

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CHROMITE ORE DEPOSITS IN EGYPT | PPT

8. Egyptian Ore Deposits Other, less important sites and many others of negligible importance. Production of chromite is very insignificant in Egypt, only a few hundred tonnes annually. It reached a climax of 998 tonnes in 1977, then dropped to its present negligible level due to exhaustion of the known lenses. The majority of these ores are exhausted. No large …

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Global chromium reserves by country 2023

Kazakhstan has the world's largest reserves of the transition metal chromium, amounting to some 230 million metric tons as of 2023. The total global reserves of chromium …

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Al Tamman Ferro Alloys (FZC) LLC

Oman is a major exporter of Chromite Ore. Abundant mid-grade Chromite Ore deposits, coupled with consistent supply of electrical energy from Oman grid, supply from captive solar power …

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Chromite—A cost-effective refractory raw material for …

The chromite deposit at Verref's Marico Chrome mine is described. The refractory properties of chromite and their role in basic refractories are ... exports to central Africa and to overseas markets. Samancor was formed by the amalgamation of SA Manganese Ltd and African Metals Corporation Ltd (Amcor) in 1975. It was known as SA Manganese

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(PDF) A Process Mineralogical Evaluation of Chromite at …

The Bushveld Complex hosts the largest chromite deposits worldwide [5]. In addition to hosting the largest chromite deposits, it is also the largest known layered intrusion in the world. ... Technical Report WC9761; Overseas Geology Series; British Geological Survey: Nottingham, UK, 1997; pp. 1–27. Falconer, A. Gravity Separation: Old ...

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Characterization and origin of high-Al chromitites: A case …

For both chromite deposits, the forsterite (Fo) contents of olivine increase from harzburgite (90.0–91.6) to dunite (89.9–94.6) and chromitite (90.0–97.2). Mineral compositions of olivine show significant variabilities at the contact boundaries between densely disseminated and sparsely disseminated chromitites. These features suggest that ...

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National Mineral Inventory

2.1 CHROMITE Introduction Chromite is an important commercial chromium bearing mineral. It is an oxide of chromium and iron (FeO Cr 2 O 3 or Fe Cr 2 O 4). It belongs to the spinel group. In its purest form the chromite ore contains 68% chromium oxide and Cr: Fe ratio is 1.8:1, but in nature such chromite is rare. It occurs as a primary mineral of

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Petrogenesis of the Ophiolitic Giant Chromite Deposits of …

Petrogenesis of the Ophiolitic Giant Chromite Deposits of Kempirsai, Kazakhstan: a Study of Solid and Fluid Inclusions in Chromite - 24 Hours access EUR €53.00 GBP £44.00 USD $58.00 Rental. This article is also available for rental through DeepDyve. Advertisement ...

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Podiform chromite deposits--database and grade and …

Chromite ((Mg, Fe++)(Cr, Al, Fe+++)2O4) is the only source for the metallic element chromium, which is used in the metallurgical, chemical, and refractory industries. Podiform chromite deposits are small magmatic chromite bodies formed in the ultramafic section of an ophiolite complex in the oceanic crust. These deposits have been found in midoceanic …

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Compositions and Tectonic Settings of Chromite Deposits

CHROMITE DEPOSITS THROUGH TIME 5 2 9 . is simplified, so that failure to mention any particular . chromite occurrence or idea from the voluminous lit- erature does not imply that it has any less importance . than those noted here. Chromite ores are usually classed as either strati- form, associated mainly with continentally hosted

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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 Kempirsai ophiolite massif is …

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Petrogenesis of the Ophiolitic Giant Chromite Deposits …

Chromite Deposits of Kempirsai, Kazakhstan: a Study of Solid and Fluid Inclusions in Chromite FRANK MELCHER*, WALTER GRUM, GRIGORE SIMON†, TATIANA V. THALHAMMER AND EUGEN F. STUMPFL

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Refractory- and metallurgical-type chromite ores, Zambales …

The Zambales ophiolite is the major source of chromite ore in the Philippines. The chromitites are concordant cumulates and are associated with distinct chromitite-bearing sequences within the mantle peridotites. Refractory and metallurgical chromite deposits are spatially separated and related to different lithologic associations, which crystallized from different parental magmas ...

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Mining & Minerals

Muscat Overseas Group has been at the forefront of the Sultanate's economic diversification drive through the development of the mining and minerals sector. ... focus of the business vertical is on integrated mining and state-of-the-art …

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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, Chromite-Spinel Series, Chromite-Magnetite Series and the Chromite-Magnesiochromite Series.It is the iron analogue of Zincochromite, Cochromite, Manganochromite and Magnesiochromite and the Cr …

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Chromium (Cr) Ore | Minerals, Formation, Deposits

Chromium (Cr) ore refers to a natural mineral deposit that contains chromium in its raw form. Chromium is a chemical element with the symbol Cr and atomic number 24. It is a hard, lustrous, and corrosion-resistant metal that is widely used in various industrial applications due to its unique properties.

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Chromite deposits in the northern Oman ophiolite: …

Chromite deposits in the northern Oman ophiolitic complex occur in three structural contexts, i.e., (1) at the base of the cumulate series, (2) in the top kilometer of the mantle sequence, and (3) in the deeper parts of the mantle. Types 1 and 2 are characterized by the diversity of interstitial silicates where in decreasing order of abundance olivine, clinopyroxene, orthopyroxene, …

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Stratiform Chromite Deposit Model

potential of chromite deposits depends mainly on the thickness, continuity, and grade of ore. The most important uses of chromium are in stainless steels, nonferrous alloys, and chromium plating. Chemical-grade chromium is widely used in chemicals and pigments. Chromium also is an important component in refractories. Many of the major ...

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Integrated geological and geophysical approaches to map …

The chromite deposits belong to the Alpine type and are present in dunite and harzburgite as the country rocks (Park et al., 2022). In the study area, the predominant form of ore deposits is lenticular or vein-shaped, although there are also bedded deposits of low-grade banded ore present (Abdel Magid, 1983).

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Compositions of chromite, associated minerals, and parental …

Podiform chromite deposits are hosted in mantle sequences of ophiolites, and the hosting peridotites are typically considered to be residuum after partial melting. There does not appear to be a correlation between the degree of depletion of mantle peridotites and the presence or absence of podiform chromite deposits. The melts that formed the ...