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Origin of chromite

  • Chromite ✕About this siteThe English is the Englishlanguage edition of the free online encyclopedia . It was founded on 15 January 2001 as 's first edition and, as of June 2021, has the most articles of any

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sukinda sukinda is a town in jajpur district, odisha, india.odisha accounts for about 98% of the total proved chromite (chromium ore) reserves of the country, of which about 97% occur in the sukinda valley. in september 07, the blacksmith institute listed sukinda as one of the 10 most polluted places in the world. multiple local political figures and scientists disputed the listing, claiming thatchromite mineral britannicachromite, relatively hard, metallic, black oxide mineral of chromiumand iron(fecr2o4) that is the chief commercial source of chromium. it is the principal member of the spinelseries of chromium oxides; the other naturally occurring member is magnesiochromite, oxide of magnesiumand chromium (mgcr2o4). chromite is commonly found as brittle masses in peridotites, serpentines, and other basic igneous and metamorphicthe origin of the brunflo fossil meteorite andthe meteorite hence appears to be an anomaly in relation to the kinnekulle meteorites, in which chromite composition, chondrule mean diameter and oxygen isotopic composition all indicate an lchondritic origin, reflecting an enhanced flux of meteorites to earth following the disruption of the l chondrite parent body 470 ma. origin of podiform chromitites researchgatethe origin of podiform (or alpinetype) chromitites . for chromite precipitation, and concluded that the . suprasubduction zone mantle is a favorable host for . podiform chromitites.the origin of the brunflo fossil meteorite andthe origin of the brunflo fossil meteorite and extrat errestrial chromite in midordovician limestone 97 variabilis zone and the lower e. suecicus p. sulcatus subzone is about m (data for kalkberget and gusta sections in löfgren 78), with the e. variabilis zone representing m. at kinnekulle the e. variabilis zone is cut after aboutstratiform chromite deposit model usgsstratiform 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 for studying magmatic differentiation processes andthe origin of chromite symplectites in lunarthe origin of chromite symplectites in lunar troctolite 76535 a new look at an rock s. m. elardo, f. m. mccubbin, and c. k. shearer, jr., institute of meteoritics, university of new mexico, albuquerque, nm 871 [email protected] introduction despite the highly crdepleted na ture of its cumulus olivine (~0 ppm cr2o3) relative to mare basalt olivine, pristine lunar troctolitechromite

about this sitethe english is the englishlanguage edition of the free online encyclopedia . it was founded on january 01 as 's first edition and, as of june , has the most articles of any edition, at 6,352,901. as of august , % of articles in all s belong to the englishlanguage edition. this share has gradually declinedoverviewdistribution of depositspropertieshealth and environmental impactsapplicationsgallery of chromite mineral specimenssee alsoexternal links

chromite is found as orthocumulate lenses of chromitite 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 is a large layered mafic to ultramafic igneous body with some layers consisting of 90% chromite making the rare rock type, chromitite. the stillwate · text under ccbysa licensechromite mineral dataname origin named after its chemical composition. synonym chrome iron ore chromic iron ferrichromite magnetic, altered icsd 8 340 chromite image images chromite antigorite. comments chromite veins in yellow to green antigorite with picrolite, chromian antigorite and dolomite (polished section). location wood'sorigin of chromite deposits economic geologyorigin of the chromite deposits of the bay of islands igneous complex, western newfoundland economic geology spatial association between platinum minerals and magmatic sulfides imaged with the maia mapper and implications for the origin of the chromitesulfidepge associationchromite is the key to pge duke universitychromite is the key to pge f. johan kruger 1, judith a. kinnaird , paul a.m. nex2 and r. grant cawthorn2 1economic geology research institute hugh allsopp laboratory 2 of geoscienses, university of the witwatersrand, wits 50, south africa. email [email protected] introduction chromitite layers in the bushveld complex have long been known to host anomalouschromite definition of chromite by oxford dictionary onorissa is rich in bauxite, the mineral that contains aluminium's raw material, as well as coal, limestone, silica, chromite, dolomite and nickel, to mention a few sources of its mineral wealth. origin

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Advantages of origin of chromite

metal profile chromium properties, history morefeb 03, · aluminothermic production of high purity chromium metal accounts for over 95% of chromium metal produced today. the first step in this process requires that the chromite ore is roasted with soda and lime in the air at 2°f (1°c), which creates a sodium chromate containing calcine.it can be leached away from the waste material and then reduced and precipitated as chromic oxide (croperation chromite nhhcas planning got underway for the invasion of inchon, codenamed operation chromite, most of the fighting was happening elsewhere, in the southeastern corner of the korean peninsula. u.n. forces referred to this region as the pusan perimeter, because its principal point of entry and most important strategic strongh was the port city ofchromite mineral dataname origin named after its chemical composition. synonym chrome iron ore chromic iron ferrichromite magnetic, altered icsd 8 340 chromite image images chromite antigorite. comments chromite veins in yellow to green antigorite with picrolite, chromian antigorite and dolomite (polished section). location wood's1origin of chromite deposits by vaibhav singhal issuunov 22, 10· origin of chromite deposits (from understanding mineral deposits by k c misra) some workers proposed that the "chromatic intervals" in the critical zone of the bushveld layered series formed duechromite mining the oregon encyclopediathe story of chromite in oregon begins during the jurassic period, approximately 0 million s ago, when both the klamath and blue mountains were part of oregon's early coast range. containing oregon's est rocks, those mountains share the state's largest formations of peridotite and serpentine, the environment in which chromite is formed.origin of chromite nodules in podiform chromitite from thealthough the nodular textures of chromitite have been emphasized in metallogenic theories of the economic podiform chromite deposits, the origin of chromite nodules is still controversial. firstly, thayer (69) pointed that the nodular texture could be the product of aggregation of freeformed chromite grains prior to settling.chemistry, morphology and origin of magmaticreactionchemistry, morphology and origin of magmaticreaction chromite stringers associated with anorthosite in the upper critical zone at winnaarshoek, eastern limb of the bushveld complex roger n scoon, roger n scoon department of geology, rhodes university, grahamstown, south africa. corresponding author.peridotite igneous rock pictures, definition morechromite in peridotite. some peridotites contain significant amounts of chromite. some of these form when a subsurface magma slowly crystallizes. during the early stages of crystallization, the highesttemperature minerals such as olivine, orthopyroxene, clinopyroxene, and chromite begin toinchon landing (operation chromite)sep 22, · operation chromite was the un assault designed to force the north korea people's army (nkpa) to retreat from the republic of (south) korea. on 25 june 50 the nkpa invaded south korea, launching the first major armed conflict of the c war. postwwii defense cutbacks weakened u.s. armed forces, but u.s. response to the invasion across the 38th parallel dividing north and southchromite (iron chromium oxide) amethyst galleriesthe mineral chromite. chemical formula fecr 2 o 4, iron chromium oxide. uses the principle ore of chromium, as a refractory component, as a dye and as mineral specimens. 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 deposits of grant county, oregonchromite appears to be genetically related to dunite and is probably of early magmatic origin. most of the readily acces­ sible deposits of highgrade chromite have been worked out, and future production will be predominantly from lowgrade concen­ trating ore containing from mineralogy and origin of stichtite in chromitecontrib mineral petrol (97) 7 7586 springerverlag 97 d. ashwal · bruce cairncross mineralogy and origin of stichtite in chromitebearing serpentinites received 4 april 96 / accepted september 96 abstract stichtite, a rare ( known localities world mixed volatile phase.minerals free fulltext origin of platinum groupthis paper reviews a database of about 00 published and 1 unpublished microprobe analyses of platinumgroup minerals (pgm) from chromite deposits associated with ophiolites and alaskantype complexes of the urals. composition, texture, and paragenesis of unaltered pgm enclosed in fresh chromitite of the ophiolites indicate that the pgm formed by a sequence of crystallization events

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The case of origin of chromite

origin of platinum group minerals (pgm) inclusions inminerals article origin of platinum group minerals (pgm) inclusions in chromite deposits of the urals federica zaccarini 1,*, giorgio garuti 1, evgeny pushkarev 2 and oskar thalhammer 1 1 department of applied geosciences and geophysics, university of leoben, peter tunner str.5, a 8700 leoben, austria; [email protected] (g.g.); [email protected] (o.t.)chromite definition of chromite by merriamwebsterapr , · chromite definition is a black mineral that consists of an oxide of iron and chromium and is the only chromium ore.chromite mining in sukinda valley in odisha countercurrentsthe history of chromite exploration in sukinda valley started way back in 49. curiously, some boulders of chrome ore were reported by a local tribal named kate purty. soon after, the occurrencethe origin of the brunflo fossil meteorite andthe meteorite hence appears to be an anomaly in relation to the kinnekulle meteorites, in which chromite composition, chondrule mean diameter and oxygen isotopic composition all indicate an lchondritic origin, reflecting an enhanced flux of meteorites to earth following the disruption of the l chondrite parent body 470 ma.iron and magnesium isotopic constraints on the origin ofthe chromite d26mg values span a significant range from .41 to 10..large disequilibrium fe and mg isotope fractionation between ch romite and olivine, as well as positive correlation of chromite d56fe values with their mgo contents, could be attri buted to femg exchange between chromiteperidotite igneous rock pictures, definition morechromite in peridotite. some peridotites contain significant amounts of chromite. some of these form when a subsurface magma slowly crystallizes. during the early stages of crystallization, the highesttemperature minerals such as olivine, orthopyroxene, clinopyroxene, and chromite begin tochromite chromium ore, properties, uses and occurrencechromite is a common constituent of peridotite rocks and the serpentines derived from them. one of the first minerals to separate from a cooling magma; large chromite ore deposits are thought to have been derived by such magmatic differentiation.geological features and origin of the chromite deposits ofup to10%cash back· the chromiferous ultramafic rocks of sukinda valley (°0'°5'n85°43'86°0'e) of orissa are intrusive into the ironore supergroup (2,9503,0 ma) at the eastern periphery of the indian precambrian shield. both laterally and vertically, chromite occurs as persistent layers, lenses or pockets in the serpentinized and silicified duniteperidotite extending over a strike length of 25 km. origin of the ug2 chromitite layer, bushveld complex.the one tha t hosts the u g2 is 25 m. thick and is hereafter referred to a s the ug2 pyroxenite. in the central sect or of the eastern bushveld, the ug2. chromitite i tself is a mass ive, 70 cmiron and magnesium isotopic constraints on the origin ofthe chromite d26mg values span a significant range from .41 to 10..large disequilibrium fe and mg isotope fractionation between ch romite and olivine, as well as positive correlation of chromite d56fe values with their mgo contents, could be attri buted to femg exchange between chromitechromite the only mineral ore of chromium metalchromite is found in beach sands derived from the weathering of chromitebearing rocks and laterite soils that developed over peridotite. beach sand rich in chromite and other heavy minerals is sometimes mined, processed to remove heavy minerals, and returned to the environment.chemical classification oxidea brief history of chromite smelting mintekgroup) chromite seams, while lowergrade chromiteis recovered from the ug2 (upper group), which is an abundantbyproduct from platinum production. ug2 chromite over the past decade, ug2 chromite has formed a growing proportion of the world's chromite supply. over the past two decades the supply of

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