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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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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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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Intro:Chromium Producing Countries

Environmental and economic curtains fell on some Asian facilities, making China the ultimate consumer of imported chromium chemicals. Diving a little deeper into last year's statistics, only …

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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 near Seiad and McGuffy Creeks, Siskiyou …

The chromite deposits described in this report are in northcentral Siskiyou County, Calif. They are in two long tabular masses of peridotite which lie end to end and trend northnorthwest across the valley of the Klamath River. The Seiad Creek-Red Butte mass extends 10 miles north of the river and the Hamburg-McGuffy Creek mass 8 miles south.

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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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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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Chromite and other mineral deposits in serpentine rocks of …

Between 1820 and 1850, additional deposits were discovered and mined in Maryland and Pennsylvania, including the largest deposit of massive chromite ever found in the United States the Wood deposit, in the State Line district. A second period of extensive chromite mining came during the late 1860's and early 1870's.

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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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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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Al Tamman Ferro Alloys (FZC) LLC

Partnership between Muscat Overseas Group (Oman) & LL-Resources GmbH (Austria). 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 station and proximity to Sohar port makes ...

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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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(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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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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(PDF) Understanding Stratiform Chromite …

Stratiform chromite deposits are of great economic importance, yet their origin and evolution remain highly debated. Layered igneous intrusions such as the Bushveld, Great Dyke, Kemi, and Stillwater Complexes, provide opportunities …

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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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Petrogenesis of the Ophiolitic Giant Chromite Deposits of …

The largest chromite deposits in the western part of the syncline are the Millionnoe, Diamond Pearl and 20 Years of Kazakh SSR deposits, dipping 5–50° to the west (Pavlov et al., 1968). The eastern part of the syncline contains small deposits such as Sputnik, and large deposits such as Mir, Voskhod-Karagash and 40 Years of Kazakh SSR ...

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Metallogeny and advances of chromite deposits

The podiform chromite deposit is widely distributed and closely symbiotic with ophiolite, but the scale of this deposit is generally small. There are obvious differences in the occurrence, fabric, structure and paragenetic association of the two different chromite types. The podiform chromite is mainly formed in the Phanerozoic, with a small ...

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Stratiform chromite deposit model | U.S. Geological Survey

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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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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Podiform Chromite Deposits—Database and Grade and …

Of these, 619 deposits have been used to create three new grade and tonnage models for podiform chromite deposits. The major podiform chromite model has a median tonnage of 11,000 metric tons and a mean grade of 45 percent Cr 2 O 3. The minor podiform chromite model has a median tonnage of 100 metric tons and a mean grade of 43 percent Cr 2 O 3.

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Geological features and origin of the chromite deposits …

The chromite deposits of the Sukinda Valley occur as persistent layers or as lenses and pockets in the altered dunite-peridotite, extending for nearly 25km in the NE-SW direction across Cuttack and Dhenkanal districts of Orissa (Fig. 1). The ultramafic rocks intrude into the

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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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Developing Countries: 7 Key Economic Insights for …

Chromite, a vital industrial mineral, is the primary source of chromium, an essential element used in the production of stainless steel, alloys, and various chemical products. Developing …

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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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Genesis of chromite deposit in the Sartohay ophiolite, NW …

Chromite serves as an ideal 'microcontainer' for inclusions due to its resistance to alteration (e.g., Shimizu et al., 2001).Yet, high-Al chromite deposits have received significantly less attention compared to their high-Cr counterparts (Liu et al., 2024).Chromite in these chromitites contains a variety of inclusions, including fluids, hydrous and anhydrous silicates, …

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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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sbm/sbm chromite deposits overseas.md at master

Chromite — A Cost Effective Refractory Raw Material for … exports to central africa and to overseas markets.Samancor was formed by the amalgamation of SA Manganese Ltd and African.The Marico Chromite Deposit Chromite 05.10.2015 (Latest).pmd Indian Bureau of… resources of chromite are located in Odisha,able 1 : Reserves Resources of ...

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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—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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Chromite mineral deposits in West Asia

Several countries in West asia possess notable Chromite deposits. Turkey, for instance, hosts chromite deposits primarily within the ophiolite complexes of its western and southeastern …

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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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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 ...

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Current supply status, demand trends and security

In a statistical study, Zhao et al. (2021) [10] found 526 chromium deposits globally, with 56 large (>5 million tons) to super-large (>50 million tons) deposits accounting for 10.6% …

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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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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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Genesis of chromite deposits by dynamic upgrading of Fe …

A fundamental problem in the genesis of all stratiform chromite deposits is how layers of massive to semi-massive chromite that are commonly up to 1 m thick (e.g., Bushveld [South Africa], Stillwater [Montana, USA]), less commonly up to 10 m thick (e.g., Inyala and Railway Block [Zimbabwe], Ipueira-Medrado [Brazil], Uitkomst [South Africa], Sukinda [India]), …

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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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