chromite ore podiform
Podiform Chromite Deposits—Database and Grade and
2012-8-7 · Podiform chromite deposits are an important source for chromite, which is the only ore for chromium, and they are the primary source for both high-chromium, low-aluminum
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Podiform Chromite Deposits--Database and
2012-8-15 · Expected sizes of undiscovered podiform chromite deposits, with respect to degree of deformation or ore-forming process, may determine which model is appropriate. The banded podiform chromite model may be applicable
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Origin of podiform chromite deposits by magma mingling ...
1998-3-30 · Nodular and orbicular ores are unique to chromite ore from podiform deposits. Suggested origins include mechanical coalescence of olivine and chromite grains to rounded nodules in turbulent magma conduits [3,7,9], the existence of immiscible oxide melts under mantle conditions [10], or some unspecified form of hydrothermal ac tivity in the ...
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Descriptive & Grade-Tonnage Model of Podiform
1998-9-23 · "ore". The mixture of shipping grades and in-place grades may explain the significant negative correlation (r =-0.25) between grade and tonnage.Rh, Ir, Ru, Pd, and Pt grades are based on reported analyses of samples from the deposits.Unreported PGE grades are probably similar to those presented here.Rhodium is correlated with chromite (r = 0.35,
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ZonedMn-rich chromite from podiform type chromite
2007-8-25 · chromite ore subsequently transformed to ferrit-chromit and magnetite in variable proportions. The ratio of magnetite to chromite ranges from 0.2 to 9.0. The highest magnetite valueb are seen in deformed, fine-grained ore. The periphery of chromite core and an intermediate zone of ferrit-chromit contain up to 14.4 vtt.Vo MnO.
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Compositions of chromite, associated minerals, and ...
2014-7-1 · The selected podiform chromite deposits are well known in the literature (Zhou and Bai, 1992, Zhou et al., 1996, Zhou et al., 2001a, Zhou et al., 2001b, Proenza et al., 2004, Proenza et al., 2008, Gonzalez-Jimenez et al., 2011) and contain typically concordant or subconcordant ore bodies enclosed in dunite within peridotite hosts.
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(PDF) Origin of podiform chromitites -
2022-1-25 · The podiform chromitite. can be produced at both oceanic and arc-related settings. The arc-related setting is, however, favorable for most of the
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Chromite: The only mineral ore of chromium metal
Stratiform, Podiform, and Beach Sands. Small amounts of chromite are found in many types of rock. However, chromite deposits that are large enough for
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What are the new and effective methods for the
Podiform chromite deposits usually occur as pods and discontinue bodies with different sizes and orientation. Also, their geological setting is tectonically active and cause ore body distribution.
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Geochemical Characterization of Podiform Chromite Ores ...
Four main podiform occurrences of chromite have been distinguished in the ultramafic Bulqiza massif, Albania; they are associated from the bottom to the top with: i) basal harzburgites (lower tectonite sequence), ii) dunitic lens-bearing harzbugites (middle-upper tectonite sequence), iii) layered chromitite-bearing dunites of transitional zone, and, iiii) the stratigraphically lowermost
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(PDF) Podiform chromite deposits; database and grade
Cumulative frequency of ore tonnages of major podiform chromite deposits. Each red dot represents an individual deposit (n is the total number of deposits). Intercepts for the 90th, 50th, and 10th ...
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PODIFORM CHROMITE M03 by Chris Ash BC Geological
2003-11-25 · Podiform chromite is the only source of refractory-type ore (min. 25% Al2O3: min. 60% Cr2O3 + Al2O3: max. 15% FeO). Historically podiform-type ore fields account for 57% of all chromite produced. REFERENCES Albers, J. P. (1986): Descriptive Model of Podiform Chromite; in Mineral Deposit Models, Cox, D.P. and
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Podiform chromite at Voskhod, Kazakhstan -ORCA
The Voskhod podiform chromitite is one of more than 30 chromitite deposits that collectively form the Main Ore Field (MOF) within the Kempirsai Massif, in Kazakhstan. The MOF is the largest podiform chromitite ore-field in the world. The Voskhod deposit, encased in a serpentinised dunite halo, is situated within harzburgite units that comprise the mantle sequence of the Kempirsai
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Descriptive & Grade-Tonnage Model of Podiform
1998-9-23 · "ore". The mixture of shipping grades and in-place grades may explain the significant negative correlation (r =-0.25) between grade and tonnage.Rh, Ir, Ru, Pd, and Pt grades are based on reported analyses of samples from the deposits.Unreported PGE grades are probably similar to those presented here.Rhodium is correlated with chromite (r = 0.35,
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The mineralogy and chemistry of the podiform chromite ...
Podiform chromite deposits are characteristic of the ultramafic complexes of the ophiolites. In the Limassol Forest Plutonic Complex, one of the two plutonic complexes of Troodos ophiolite, Cyprus, the deposits are located dominantly at the periphery of the serpentinite body either close to the contact between the serpentinized harzburgite (Bastite Serpentinite) and a highly
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(PDF) Origin of podiform chromitites - ResearchGate
2022-1-25 · The podiform chromitite. can be produced at both oceanic and arc-related settings. The arc-related setting is, however, favorable for most of the podiform chromitites, especially for large-scale ...
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What are the new and effective methods for the
Podiform chromite deposits usually occur as pods and discontinue bodies with different sizes and orientation. Also, their geological setting is tectonically active and cause ore body distribution.
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Magmatic Ore Deposits - BU
2020-8-4 · podiform deposits. ŁKind of deposits ŁAlmost all chromite deposits are magmatic segregation in ultrabasic rocks. Chromite occurs in the host rock as masses, lenses, and dissemination. ŁAll economic deposits of chromite are in ultrabasicrocks and are either stratiform in layered intrusions (98% of world™s chromite resources) or podiform
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Geochemical Characterization of Podiform Chromite Ores ...
Four main podiform occurrences of chromite have been distinguished in the ultramafic Bulqiza massif, Albania; they are associated from the bottom to the top with: i) basal harzburgites (lower tectonite sequence), ii) dunitic lens-bearing harzbugites (middle-upper tectonite sequence), iii) layered chromitite-bearing dunites of transitional zone, and, iiii) the stratigraphically lowermost
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(PDF) Podiform chromite deposits; database and grade
Cumulative frequency of ore tonnages of major podiform chromite deposits. Each red dot represents an individual deposit (n is the total number of deposits). Intercepts for the 90th, 50th, and 10th ...
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PODIFORM CHROMITE M03 by Chris Ash BC Geological
2003-11-25 · Podiform chromite is the only source of refractory-type ore (min. 25% Al2O3: min. 60% Cr2O3 + Al2O3: max. 15% FeO). Historically podiform-type ore fields account for 57% of all chromite produced. REFERENCES Albers, J. P. (1986): Descriptive Model of Podiform Chromite; in Mineral Deposit Models, Cox, D.P. and
Read More
Descriptive & Grade-Tonnage Model of Podiform
1998-9-23 · "ore". The mixture of shipping grades and in-place grades may explain the significant negative correlation (r =-0.25) between grade and tonnage.Rh, Ir, Ru, Pd, and Pt grades are based on reported analyses of samples from the deposits.Unreported PGE grades are probably similar to those presented here.Rhodium is correlated with chromite (r = 0.35,
Read More
ZonedMn-rich chromite from podiform type chromite
2007-8-25 · chromite ore subsequently transformed to ferrit-chromit and magnetite in variable proportions. The ratio of magnetite to chromite ranges from 0.2 to 9.0. The highest magnetite valueb are seen in deformed, fine-grained ore. The periphery of chromite core and an intermediate zone of ferrit-chromit contain up to 14.4 vtt.Vo MnO.
Read More
What are the new and effective methods for the
Podiform chromite deposits usually occur as pods and discontinue bodies with different sizes and orientation. Also, their geological setting is tectonically active and cause ore body distribution.
Read More
Minerals | Free Full-Text | ASTER-Based Remote Sensing ...
2021-7-19 · Podiform chromite mines have produced 57.4% of the world’s total chromite production . Ophiolite zones in Iran are widespread and are often found in different locations with varying geologic and tectonic settings. ... The existence of a dunitic envelope with various thicknesses is a common characteristic of all chromite ore bodies in this ...
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Peridotites, chromitites and diamonds in ophiolites ...
2021-2-16 · Podiform chromitites, ore deposits composed primarily of chromite that are hosted in the mantle sections of ophiolites, contain a wealth of
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Magmatic Ore Deposits - pubs.geoscienceworld.org
Relict cumulate features preserved in podiform chromite deposits include some textures found in stratiform complexes and, in addition, nodular and orbicular textures. Nodules of chromite are shown to have grown while freely suspended in magma, either by crystallization of chromite alone, or of chromite plus plagioclase and/or olivine in varying ...
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CHROMITE GEOLOGY OF ZIMBABWE AND RELATED
2017-8-17 · •Podiform known resources are off the Dyke in Shurugwi, Mashava , Valley, Nhema, Chirumanzu and Inyala(Mberengwa). •They constitute approx. 3% of Zimbabwe’s chromite resource. •Areas with chromite resources are scattered in the Southern side of Zimbabwe, mostly concentrated in the Midlands. PODIFORM
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