Chromitiferous

WebThe Troodos massif is a well-developed ophiolite complex comprising a sequence of basaltic volcanic rocks overlying a plutonic complex of upper gabbros and lower peridotites containing podiform chromite deposits. The chromitiferous rocks range from disseminations and minor segregations of chromite in dunite to orebodies of economic … WebA. Disrupted member of the Disrupted group showing discontinuous chromitite layers that are interpreted to have been disturbed by processes analogous with "soft sediment-like" deformation. The...

A mechanism for chromite growth in ophiolite complexes: …

WebDec 1, 2010 · The rejects of the beneficiation process contains chromite which can be used as a feed for the ferro chrome plants. Through physical beneficiation the iron enrichment … WebThe chromitiferous ore is rich in Fe–Ni–Cu sulfides and PGEs. Concentration of disseminated sulfides in the upper parts of basement gneisses is caused by downward migration of residual sulfide liquid and fractionation out of the remaining platinum elements. Sulfide-rich zones with massive sulfides accumulating at the footwall are due to the ... how fast is shinra fire force https://readysetbathrooms.com

Refractory- and metallurgical-type chromite ores, Zambales …

WebBoth laterally and vertically, chromite occurs as persistent layers, lenses or pockets in the serpentinized and silicified dunite-peridotite extending over a strike length of 25 km. The ultramafic rocks and the chromitite layers are cofolded with the Iron-Ore Supergroup into a plunging syncline. WebThe complex is composed of several persistent lithological units from the base upwards: Basal Gabbro 3–6 m thick; Lower Harzburgite 30–40 m thick; Chromitiferous Harzburgite 30–60 m thick; Main Harzburgite up to 400 m thick; Upper Pyroxenite 60–70 m thick; Gabbronorite and Upper Gabbro units up to 300 m thick with chilled and quenched zones … WebAug 14, 2013 · The few metres to 200 m thick on the Chrome, Page, Peterson chromitiferous zone on the Chrome property in general Block and National-Ledin properties (Figure GS-19-3). contains numerous straight, continuous, massive chro- The transition series was either absent or ranges from 1 to mitite (>85% chromite) seams … how fast is shisui

Chromite deposits in the northern Oman ophiolite: Mineralogical ...

Category:Formation of Chromitite Seams and Associated ... - Oxford Academic

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Chromitiferous

Geological Investigations in the Bird River Sill, Southeastern …

WebDec 23, 2024 · The upper ultramafic unit contains, more frequently, pegmatoidal sections, and the Chromitiferous Harzburgite unit has less massive chromitite layers than the … Websaturated in chromite and left a chromitiferous anortho-sitic residue. Formation of a chromitite seam was assumed to have been aided by deformation of a mush and the migration and trapping of chromite seed crys-tals at lithological contacts. Scoon & Costin (2024) sug-gested that thin chromitites in the Upper Critical Zone

Chromitiferous

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WebDec 31, 2024 · The upper ultramafic unit contains, more frequently, pegmatoidal sections, and the Chromitiferous Harzburgite unit has less massive chromitite layers than the southeastern parts of the complex, whereas the gabbro(-norite) units contain more interstitial liquid with late-stage minerals. The findings confirm that the anvil-shaped intrusion in ... WebThe 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.

WebAbstract. The chromitite-bearing peridotites of the Zambales mafic-ultramafic complex form the lowermost level of the Zambales ophiolite, which exposes a complete ophiolitic … Webchromitiferous orthopyroxenite approximately 0.02 m thick. This is in turn overlain by the massive chromitite (1.04 m thick). The chromitite itself has negligible amounts of inter cumulus orthopyroxene. A thin orthopyroxenite layer (0.01 m thick) occurs just below the upper contact and several

WebSep 1, 1999 · Compositional variation of chromite is limited within the massive LG6 Chromitite layer, where chromite is the sole cumulus phase. Compositions vary significantly in chromitiferous orthopyroxenite and in those samples where the immediate contact between the silicate and oxide cumulates has been intersected.

Webevaluation of the metallurgical properties of chromitiferous drill core DU-15 from the Birch Lake region of NE Minnesota by MRRC (Sabelin, 1985, 1987; Sabelin et al., 1986) led to the discovery of platinum group elements (PGE) within the basal zone of the Duluth Gabbro. Because of this, the DNR decided to log and sample diamond drill

WebDec 1, 2000 · Materials Chromitiferous overburden, analaR grade sulphuric acid, NaC1, CaCI2, MgSO4, A12 (SO4)3, Na2SO4, K2SO4 and sea water. EXPERIMENTAL … high end tricycleWebApr 1, 2003 · Abstract. Low-grade nickeliferous laterites from the Sukinda region, Orissa, India, were characterized by microscopic investigations, using X-ray diffraction (XRD), … how fast is silverWebA. Disrupted member of the Disrupted group showing discontinuous chromitite layers that are interpreted to have been disturbed by processes analogous with "soft sediment-like" … how fast is shutterfly shippingWebThe chromitiferous rocks of the Troodos ophiolite complex, Cyprus D. Greenbaum Geology 1977 The Troodos massif is a well-developed ophiolite complex comprising a sequence … high end tray tablesWebAn evaluation of chromitiferous layers and their host rocks in the Platreef, on the Turfspruit and Zwartfontein properties: A comparative study with the main Bushveld Complex. By … high end triple monitor armsWebThe upper ultramafic unit contains, more frequently, pegmatoidal sections, and the Chromitiferous Harzburgite unit has less massive chromitite layers than the … high end trendy baby clothesWebFeb 28, 2024 · A fundamental difference exists between the textures of chromite crystals in chromitites in layered complexes and ophiolites. Those in layered complexes generally have euhedral octahedral shapes except where sintered, whereas those in ophiolites generally have rounded shapes accompanied commonly by nodular and more rarely dendritic … how fast is skydiving