Ultramafic rock - Wikipedia
Soil and regolith on ultramafic rock Serpentine soil is a magnesium rich, calcium, potassium and phosphorus poor soil that develops on the regolith derived from ultramafic rocks. Ultramafic rocks also contain elevated amounts of chromium and nickel which may be toxic to plants. As a result, a distinctive type of vegetation develops on these soils.
Lateritic nickel ore deposits - Wikipedia
24.06.2007 · Lateritic nickel ores formed by intensive tropical weathering of olivine-rich ultramafic rocks such as dunite, peridotite and komatiite and their serpentinized derivatives, serpentinite which consist largely of the magnesium silicate serpentine and contains approx. 0.3% nickel.
Microwave Treatment of Ultramafic Nickel Ores: …
Ultramafic nickel ores are difficult to process because they contain serpentine, an anisotropic mineral with a nonspherical morphology and multiple pH-dependent surface charges. Dehydroxylation of serpentine in ultramafic nickel ores by microwave treatment is proposed to improve the processability of these ores.
Ultramafic nickel laterites in Indonesia (Sulawesi ...
Indonesia is one of the most significant nickel (Ni) ore producers in the world (Mudd, 2009). Nickel is extracted from ultramafic regoliths, which are widespread and extensive in Indonesia,...
Froth Flotation of Ultramafic Nickel Ore - No Pre ...
25.04.2010 · https://www.researchgate.net/publication/241091320_Processing_an_ultramafic_ore_using_fiber_disintegration_by_acid_attack Ultramafics are one of the three ma...
Collectorless Froth Flotation of Ultramafic Nickel …
02.05.2010 · The video shows froth zone loaded with sulphides in batch flotation of Ultramafic Nickel Ore after grinding and aging. Aging was used to allow some time to form elemental sulphur films on sulphide...
Kambalda type komatiitic nickel ore deposits - …
Kambalda type komatiitic nickel ore deposits are a class of magmatic iron - nickel - copper - platinum -group element ore deposit in which the physical processes of komatiite volcanology serve to deposit, concentrate and enrich a Fe-Ni-Cu- (PGE) sulfide melt within the lava flow environment of an erupting komatiite volcano.
Nickel | Geoscience Australia
Laterite-hosted nickel deposits form by the weathering of ultramafic rocks and are a near-surface phenomenon related to tropical climates. Although Australia holds large resources of lateritic nickel, very large deposits of this type also occur in Indonesia, New Caledonia, Philippines, Cuba and Brazil.
Hydrothermal Mineral Systems :: Mineral Systems …
Geochemical appraisal of mafic and ultramafic rocks from a series of IGO prospects along the Albany-Fraser Belt of WA Western Australia . Geochemical appraisal of mafic and ultramafic rocks from a series of IGO prospects along the Albany-Fraser Belt of WA. Learn more. Magma dynamics and ore deposits Australia. Magma dynamics and ore deposits. Learn more. TEAM Marco Fiorentini Associate ...
2.5 Mafic-ultramafic orthomagmatic mineral …
The base of the intrusion has an ultramafic composition ranging from dunite, lherzolite, harzburgite, websterite, clinopyroxenite and orthopyroxenite (Hoatson, 1998). Nickel-Cu sulfides can settle out at the base of the intrusion as the velocity of the magma decreases when it enters the magma chamber (Barnes and Lightfoot, 2005).
Ore genesis - Wikipedia
Nickel deposits are generally found in two forms, either as sulfide or laterite. Sulfide type nickel deposits are formed in essentially the same manner as platinum deposits. Nickel is a chalcophile element which prefers sulfides, so an ultramafic or mafic rock which has a sulfide phase in the magma may form nickel …
Nickel isotope fractionation during tropical …
Ultramafic rock weathering leads to depletion in Ni heavier isotopes. ... Isotopic signatures (δ 60 Ni) from the natural Ni geochemical cycle include: bedrock samples (δ 60 Ni = 0.28 ± 0.08‰), ore samples (saprolitic and lateritic, δ 60 Ni from − 0.60 to 0.30‰) and soil samples (δ 60 Ni from − 0.19 to − 0.02‰). An overall trend of heavier isotope depletion was observed in the ...
Processes and Ore Deposits of Ultramafic-Mafic …
Ore deposits that are associated with mafic to ultramafic igneous rocks include Ni-Cu-PGE deposits, chromite deposits, Fe-Ti-V deposits (magnetite/titanomagnetite), and Fe-Ti±P (ilmenite, titanomagnetite±apatite) deposits.
Nickel isotope fractionation during tropical …
08.05.2015 · Nickel is strongly enriched in ultramafic rocks and serpentinites (~ 0.2%), ... Y. Noack, A. Decarreau, S. PetitAccurate crystal chemistry of ferric smectites from the lateritic nickel ore of Murrin Murrin (Western Australia). I. XRD and multi-scale stone approaches. Clay Miner., 39 (3) (2004), pp. 301-315, 10.1180/0009855043930136. Google Scholar . Gaudin et al., 2005. A. Gaudin, A ...
Effect of microwave pre-treatment on ultramafic …
01.06.2014 · At Vale, ultramafic nickel ore slurries have had to be diluted to 20 wt.% solids to achieve satisfactory flotation results (Patra et al., 2010). If the flotation pulp density could be increased from 20 to 30 wt.% solids by microwave pre-treatment, the volume of the pulp could be reduced by 40%, likely resulting in significant savings in infrastructure and materials handling costs. On average ...
Nickel Statistics and Information - USGS
Nickel sulfide deposits are generally associated with iron- and magnesium-rich rocks called ultramafics and can be found in both volcanic and plutonic settings. Many of the sulfide deposits occur at great depth. Laterites are formed by the weathering of ultramafic rocks and are a near-surface phenomenon.
Microwave heating of ultramafic nickel ores and ...
01.04.2014 · Two low-grade ultramafic nickel ores were used in this study: the “OK ore” (containing 0.26 wt.% Ni) from the Okanogan nickel deposit in Washington State, USA, and the “Pipe ore” (containing 0.23 wt.% Ni) from the Thomson Nickel Belt in Manitoba, Canada. The ores were crushed and sieved to produce 0.425–1 mm material, which was split into 100 g samples for microwave …