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mineral deposit

Three oxide ore minerals form magmatic cumulates: chromite, magnetite, and ilmenite. The world's largest chromite deposits are all magmatic cumulates; the largest and richest of these is in the Bushveld Complex of South Africa.

Chromite deposits of the north-central Zambales Range, Luzon

Probably 90 percent of the known deposits in the Zambales Complex are located in two belts in its northern part. One zone containing high-aluminua refractory-grade deposits extends northeast from the Coto mine and Chromite Reservation No.

Chromite: Mineral information, data and localities.

The Fe-dominant species - chromite itself - can be FOUND, although uncommonly, in many "chromite" deposits, chromitite (rock name), and other "chromite"-bearing occurrences connected with hyperbasic rocks. As a rule of thumb, a member of the chromite-magnesiochromite series is twice as likely to be a magnesiochromite instead of a chromite.

Podiform chromite deposits--database and grade and tonnage …

Chromite ( (Mg, Fe ++ ) (Cr, Al, Fe +++) 2 O 4) 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.

Pakistan Chrome Mines Ltd

Gowal Open Pit Chrome Mine Chrome Deposit Khanozai The company was owned by Pacific Energy & Mining Co. of Reno, Nevada. The mines are located in Zhob District in Baluchistan also in shangla district, specifically in Muslimbagh, Khanozai, Nisai and Gwal. [6] Some of the Deposits are located in Southern Baluchistan near Khuzdar . Contents

What is chromite | SICHENG

however, chromite deposits that are large enough for mining are generally found in: 1) stratiform deposits (large masses of igneous rock such as norite or peridotite that slowly crystallized from subsurface magma); 2) podiform deposits (serpentines and other metamorphic rocks derived from the alteration of norite and peridotite); and, 3) beach …

Chromite: The only mineral ore of chromium metal

However, chromite deposits that are large enough for mining are generally found in: 1) stratiform deposits (large masses of igneous rock such as norite or peridotite that slowly crystallized from subsurface magma); 2) podiform …

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 ...

Chromite mining

Containing Oregon's oldest rocks, those mountains share the state's largest formations of peridotite and serpentine, the environment in which chromite is formed. Most deposits of chromite in Oregon have been found near Grants …

Origin of chromite deposits | Economic Geology | GeoScienceWorld

The origin of certain chromite deposits of the eastern part of the Bushveld complex Economic Geology Origin of the chromite deposits of the Bay of Islands igneous …

[PDF] Stratiform chromite deposit model: Chapter E in Mineral deposit …

DOI: 10.3133/SIR20105070E Corpus ID: 127495676; Stratiform chromite deposit model: Chapter E in Mineral deposit models for resource assessment @article{Schulte2012StratiformCD, title={Stratiform chromite deposit model: Chapter E in Mineral deposit models for resource assessment}, author={Ruth F. Schulte and Ryan D. …

Podiform chromite deposits

Podiform chromite deposits Location and characteristics of 1,124 individual podiform chromite mineral deposits, with grade and tonnage models for chromium as well as several related …

CHROMITE ORE DEPOSITS IN EGYPT

CHROMITE ORE DEPOSITS IN EGYPT 1 of 21 CHROMITE ORE DEPOSITS IN EGYPT Oct. 16, 2016 • 10 likes • 2,381 views Science CHROMITE ORE DEPOSITS IN EGYPT, Distribution of the ophiolite in Egypt, Occurrences, Origin, ore types Geology Department, Faculty of Science, Tanta University Follow Advertisement Recommended TITANIUM ORE …

Origin of chromite deposits | Economic Geology

Origin of chromite deposits. Economic Geology (1929) 24 (7): 691–721. This content is PDF only. Please click on the PDF icon to access.

Stratiform Chromite Deposit Model

Stratiform chromite deposits are found throughout the world, but the chromitite seams of the Bushveld Complex, South Africa, are the largest and most intensely researched. The chromite ore is located primarily in massive …

Chromite Sand,Supplier, Chromite, Chrome Ore Metal Importer …

Chromite is an Iron chromium oxide that occurs naturally in the earth's crust. This industrially essential mineral is used to produce metallic chromium, that is further used to produce Stainless and Tool Steel. The high heat stability property of this material makes it an essential refractory material. The chromium can be extracted from chromite.

Chromite | Earth Sciences Museum | University of Waterloo

Minerals which are found in this deposit include copper, nickel, platinum, diamonds, palladium, gold, silver and of course chromite. This deposit of chromite is incredibly large. In fact, it is possible that there is enough chromite in this area for …

What Is Chromite | HAIXU

however, chromite deposits that are large enough for mining are generally found in: 1) stratiform deposits (large masses of igneous rock such as norite or peridotite that slowly crystallized from subsurface magma); 2) podiform deposits (serpentines and other metamorphic rocks derived from the alteration of norite and peridotite); and, 3) beach …

Mafic Layered Intrusions -Chromite and Platinum PGE Deposits

The platinum and chrome deposits are in the lower part of the lobes which is the green areas on the map so mineralization out crops around the rim and dip shallowly towards the center of the intrusion rather like in the Sudbury intrusion. Although the Bushveld as a maximum vertical extent of around 10,000 m or 10 km.

MAGMATIC DEPOSITS

Chromite deposits are the end product of the separation of solid phases (Cr-rich spinets, (Fe, Mg) (Al, Cr. Fe) 2O4) from a liquid and their accumulation into chromite-rich layers. The processes involved in the formation of chromite …

Chromite ore

CHROMITE ORE DEPOSITS IN EGYPT Geology Department, Faculty of Science, Tanta University Chromite Presentation Global Chrome Ore Forum April 2011, Dubai UAE Adnet Communications ENERGY CRITICAL ELEMENTS WITH A SPECIAL EMPHASIS ON REE EXPLORATION krishanunath1 8 minerals in india muhammed ajeeb TITANIUM ORE …

Geological features and origin of the chromite deposits of …

The different varieties of chromite ore present in the area are massive, banded and spotted, laminated and friable. The grain size of chromite varies between 0.25 and 4 mm, and the fineness of the grain increases from the bottom to the top layers. The cell dimension of chromite (8.23–8.32 Å) decreases with the increase of Al 2 O 3.

Chromite

Chromite deposits are broadly classified in early 1970's as "Stratiform" and "Podiform" according to modes of occurrence, forms, and textures. Stowe (1994) further classified …

Stratiform chromite deposit model | U.S. Geological Survey

The model focuses on features that may be common to all stratiform chromite deposits as a way to gain insight into the processes that gave rise to their emplacement and to the significant economic resources contained in them. Citation Information Study Area Contact Geology, Energy & Minerals Science Center 12201 Sunrise Valley Drive Mail Stop 954

Chromite

Chromite is found as orthocumulate lenses in peridotite from the Earth's mantle. It also occurs in layered, ultramafic intrusive rocks. In addition, it is found in metamorphic rocks such as some serpentinites. Ore deposits of chromite form as early magmatic differentiates. It is commonly associated with olivine, magnetite, serpentine and corundum. The vast Bushveld Igneous Complex of South Africa i…

Chromite Deposits | PDF | Magma | Chromium

Chromite occurs in layers or pods in the ultramafic intrusion A few deposits are in beach sands that formed from the weathering of ultramafic rocks ffLets look at the way in which these deposits form Step 1: Melting in the upper mantle, melt rises to form a magma pool, 5 -10 km below the earths surface Step 3: Crystals settle to the bottom of

CHROMITE DEPOSITS OF PAKISTAN: A SHORT REVIEW

From 1994 to 1998, the total annual production of chromite from these deposits ranged from 15,135 tons to 37,472 tons (Shah et al. 2019). There are at a minimum 60 chromite bodies in the...

Chromite | Earth Sciences Museum | University of …

Minerals which are found in this deposit include copper, nickel, platinum, diamonds, palladium, gold, silver and of course chromite. This deposit of chromite is incredibly large. In fact, it is possible that there is enough …

CHROMITE DEPOSITS OF PAKISTAN | Geology spot

Chromite occurs as small lenticular bodies or disseminations in the dunites. Nine small deposits with total reserves of 9,664 tons near Bunap and seven deposits, with reserves of only 355 tons near Rayo Nai were reported by HSC (1960). These have been since mined out and exhausted to a great extent (Ahmed 1975), though mining is still continuing.

Podiform chromite deposits

Podiform chromite deposits Location and characteristics of 1,124 individual podiform chromite mineral deposits, with grade and tonnage models for chromium as well as several related elements. View Show in a web browser window: Global Show in Google Earth or other KML viewer: podchrome.kml (uncompressed 1.4M bytes)

How Does Chromite Occur?

Formation of chrome deposits begins with chromite. In a magmatic solution of the gabbroic composition, olivine first crystallizes and leaves the main magma. Olivine is followed by chromite and magnetite crystals. Since these minerals are heavy, they collapse to the bottom.

Chromite | Chromium Ore, Properties, Uses and Occurrence

Chromite is an oxide mineral that an iron chromium oxide with formula: FeCr2O4. It is belonging to the spinel group. Chromite is the most important ore of chromium. Crystals are uncommon, but when found they are octahedral. Chromite is usually massive or in the form of lenses and tabular bodies, or it may be disseminated as granules.

Chromite deposits in the northern Oman ophiolite: Mineralogical

Type-1 and type-2 chromite deposits crystallized from a magma similar to that from which the basal cumulates formed (Al 2 O 3, 15.1–16.1 wt%; FeO/MgO, 0.55–0.60). The type-3 chromites were derived from a magma of much lower Al 2 O 3 content (12.5 wt%). It is considered that they belong to an older episode in the magmatic evolution of the complex.

Stratiform chromite deposit model | U.S. Geological Survey

The model focuses on features that may be common to all stratiform chromite deposits as a way to gain insight into the processes that gave rise to their emplacement and …

Chromite deposits

Chromite deposits Formula : (Fe, Mg) (Cr, Al)2O Density: 5 g/cm Dark grey to brownish grey in colour; low reflectivity Isotropic sub-metallic lustre weakly magnetic

Chromite Deposits

This artisanal mining of the small, or podiform chromite deposits of Afghanistan has recently come under the scrutiny of a watchdog group in Afghanistan to ensure that both the letter of …

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