Podiform Chromite Deposits—Database and Grade and
podiform chromite” deposits, not considered in the former studies. The deposit density model for podiform chromite deposits (Singer, 1994) remains applicable for the minor podiform chromite subtype, but deposit density models for the other subtypes have yet to be developed. The purpose of this publication is to present the latest
Podiform Chromite Deposits--Database and Grade and Tonnage
Aug 15, 2012 Abstract. 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.
PODIFORM CHROMITE M03 by Chris Ash BC Geological Survey
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.
Principal features and origin of podiform chromite
Podiform chromite deposits occur in peridotite and mafic complexes of alpine type, and are tabular, pencil-shaped, or irregular in form. In contrast with stratiform deposits, whose textures and structures reflect crystal settling and suggest analogies with sedimentary rocks, the textures of podiform deposits reflect extensive flowage, under magmatic conditions, as a stiff crystal mush and
Compositions of chromite, associated minerals, and
Jul 01, 2014 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.
Role of water in the origin of podiform chromitite
Oct 15, 2002 Perhaps the ore textures of podiform chromitites offer an explanation for the enrichment process,.Many undeformed chromitite pods contain nodular ores in which polycrystalline, rounded aggregates of chromite crystals are set in a dunite matrix ().The mirror image, i.e. dunite orbicules set in chromite matrix, is also observed although apparently rarer,.
What Is Chromite Chromite Sand SICHENG
Jun 02, 2020 In these deposits, the chromite is disseminated through the rock and not highly concentrated in easy-to-mine layers. Podiform deposits are known in Kazakhstan, Russia, the Philippines, Zimbabwe, Cyprus, and Greece. The first discoveries of podiform chromite deposits were made near Baltimore, Maryland in the early 1800s.
Chromite
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 igneousbody with some layers consisting of 90% chromite making the ra
CHROMITE GEOLOGY OF ZIMBABWE AND RELATED MINING
•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
Podiform chromite deposits USGS
It is not our intent to include every known deposit in the world. More importantly, for this study, the regions selected are considered well studied, with detailed deposit descriptions, maps and sections of ore bodies, and production or reserve data for most of the podiform chromite deposits
PODIFORM CHROMITE M03 emrlibrary.gov.yk.ca
podiform chromite are found in ophiolitic ultramafic rocks in the Slide Mountain, Cache Creek and Bridge River terranes. Most of these known occurrences have been reviewed by Hancock (1990). Yukon has no podiform chromite deposits. Prospects are located in Yukon-Tanana, Slide Mountain, Cache Creek, and Windy-McKinley terranes. EXPLORATION GUIDES
Podiform Chromite Ore Bodies: a Genetic Model Journal of
Feb 01, 1982 Abstract. This paper presents an attempt to interpret the formation of podiform chromite ore found in ophiolitic complexes from magmatic accumulation inside cavities along the basalt conduits feeding the main magma chamber. Two processes play a major role in chromite concentration: an active upward magma flow in narrow dykes; and an active
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 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
Podiform chromitite genesis in an Archean juvenile forearc
There are two main types of chromite ore deposits: podiform and stratiform (Stowe, 1994).Significant differences are observed between them including their host lithology, deposit scale, whole-rock platinum group elements, and other characteristics (Table 1; Xiong et al., 2013; Chen and Yang, 2018).Podiform chromitites are found only in ophiolitic peridotites and take their name from their
Podiform chromite at Voskhod, Kazakhstan -ORCA
This study arose from a unique opportunity to work on drill core samples through an un-mined podiform chromite deposit and investigate its internal structure, composition and genesis. The 18Mt ore-body has a strike of 600 m, is 170 m to 360 m wide and has an average thickness of 39 m. It has an immediate dunite halo between 1 m and 5 m thick.
PODIFORM CHROMITE AT VOSKHOD, KAZAKHSTAN
5.1 The Voskhod podiform chromite deposit 87 5.1.1 Drill Collar Grid for the Voskhod License Area 88 5.1.2 Morphology of the Voskhod podiform chromite ore body 92 5.2 Mineralogy of the hanging wall and footwall ultramafics 98 5.2.1 Overburden (OVB) 98 5.2.2 Dunite (DUN) 98
What is chromite SICHENG Chromite Sand
Apr 24, 2020 In these deposits the chromite is disseminated through the rock and not highly concentrated in easy-to-mine layers. Podiform deposits are known in Kazakhstan, Russia, the Philippines, Zimbabwe, Cyprus, and Greece. The first discoveries of podiform chromite deposits were made near Baltimore, Maryland in the early 1800s.
CHROMITE GEOLOGY OF ZIMBABWE AND RELATED MINING
•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
A new model for chromitite formation in ophiolites: Fluid
Dec 16, 2020 Lago B L, Rabinowicz M, Nicolas A. 1982. Podiform chromite ore bodies: A genetic model. J Petrol, 23: 103–125. Article Google Scholar Liu P P, Zhou M F, Chen W T, Boone M, Cnudde V. 2014. Using multiphase solid inclusions to constrain the origin of the baima Fe-Ti-(V) oxide deposit, SW China. J Petrol, 55: 951–976
CHROMITE ORE DEPOSITS IN EGYPT SlideShare
Oct 16, 2016 4. The main chromite occurrences in Egypt (Fig. 1) lie in the central part of the Eastern Desert Chromite deposits occur as small lenses and irregular masses of podiform within serpentinite rocks of ophiolitic sequences as Podiform chromite are frequent within serpentinized members of ophiolitic sequence in the Eastern Desert.
(PDF) Formation of ferrian chromite in podiform
Contrib Mineral Petrol DOI 10.1007/s00410-012-0763-3 ORIGINAL PAPER Formation of ferrian chromite in podiform chromitites from the Golyamo Kamenyane serpentinite, Eastern Rhodopes, SE Bulgaria: a two-stage process F. Gervilla • J. A. Padro´n-Navarta • T. Kerestedjian • I. Sergeeva • J. M. Gonza´lez-Jime´nez • I. Fanlo Received: 7 December 2011 / Accepted: 24 April 2012 Ó Springer
What is chromite SICHENG Chromite Sand
Chromite from Zimbabwe: Chromite from Shurugwi, Zimbabwe. Specimen is approximately 4 inches (10 centimeters) across. PODIFORM DEPOSITS. Podiform deposits are large slabs of oceanic lithosphere that have been thrust up onto a continental plate. These slabs of rock, also known as “ophiolites,” can contain significant amounts of chromite.
CHROMITE Aria Dolphin Traders co
Chromite is important because it is the only economic ore of chromium, an essential element for a wide variety of metal, chemical and manufactured products. Many other minerals contain chromium, but none of them are found in deposits that can be economically mined to produce chromium. Properties of Chromite Chromite can be challenging to identify.
ZonedMn-rich chromite from podiform type chromite ore in
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.
PODIFORM CHROMITE M03 emrlibrary.gov.yk.ca
podiform chromite are found in ophiolitic ultramafic rocks in the Slide Mountain, Cache Creek and Bridge River terranes. Most of these known occurrences have been reviewed by Hancock (1990). Yukon has no podiform chromite deposits. Prospects are located in Yukon-Tanana, Slide Mountain, Cache Creek, and Windy-McKinley terranes. EXPLORATION GUIDES
Principal features and origin of podiform chromite
Podiform chromite deposits occur in peridotite and mafic complexes of alpine type, and are tabular, pencil-shaped, or irregular in form. In contrast with stratiform deposits, whose textures and structures reflect crystal settling and suggest analogies with sedimentary rocks, the textures of podiform deposits reflect extensive flowage, under magmatic conditions, as a stiff crystal mush and
Crystallization of Podiform Chromitites from Silicate
chromite ore during flowage (Greenbaum, 1977). Leblanc et al. (1981) interpreted orbicular chromite as a concentration of small concretions, with successive lay-ers of chromite and olivine, formed in a magma flowing rapidly enough to maintain them in suspension. Podiform chromitites typically exhibit a
Chromite Ores Lirim Hoxha
Mar 20, 2012 The ores are considered as podiform chromite ores characterized by relatively small sizes, irregular shapes and limited lateral continuity. In the structural point of view Bulqiza-Batra chromite deposit is widely accepted to be hosted by an overturned antiform, with easterly vergence, 4.5 km long, 1.2 to 1.5 km wide and 0.5 to 1.7 km down dip
PODIFORM CHROMITE AT VOSKHOD, KAZAKHSTAN
5.1 The Voskhod podiform chromite deposit 87 5.1.1 Drill Collar Grid for the Voskhod License Area 88 5.1.2 Morphology of the Voskhod podiform chromite ore body 92 5.2 Mineralogy of the hanging wall and footwall ultramafics 98 5.2.1 Overburden (OVB) 98 5.2.2 Dunite (DUN) 98
(PDF) Formation of ferrian chromite in podiform
Contrib Mineral Petrol DOI 10.1007/s00410-012-0763-3 ORIGINAL PAPER Formation of ferrian chromite in podiform chromitites from the Golyamo Kamenyane serpentinite, Eastern Rhodopes, SE Bulgaria: a two-stage process F. Gervilla • J. A. Padro´n-Navarta • T. Kerestedjian • I. Sergeeva • J. M. Gonza´lez-Jime´nez • I. Fanlo Received: 7 December 2011 / Accepted: 24 April 2012 Ó Springer
Process optimization of a chrome ore gravity concentration
High-alumina chromite, largely from podiform deposits, is used in refractory applications, while iron-rich ores, largely from stratiform deposits, are utilized in metallurgical and chemical applications. Around 96% of world chromite ore production is
Uses of Chromium Supply, Demand, Production, Resources
Chromite, an oxide of iron, magnesium, aluminum, and chromium, is the only ore mineral of chromium. In nature, chromite deposits are generally of two major types: stratiform (layered) and podiform (pod shaped). Both types are associated with ultramafic igneous rocks. The world's largest stratiform chromite deposits are found in South Africa, in
CHROMITE Aria Dolphin Traders co
Chromite is important because it is the only economic ore of chromium, an essential element for a wide variety of metal, chemical and manufactured products. Many other minerals contain chromium, but none of them are found in deposits that can be economically mined to produce chromium. Properties of Chromite Chromite can be challenging to identify.
What is chromite SICHENG Chromite Sand
Chromite from Zimbabwe: Chromite from Shurugwi, Zimbabwe. Specimen is approximately 4 inches (10 centimeters) across. PODIFORM DEPOSITS. Podiform deposits are large slabs of oceanic lithosphere that have been thrust up onto a continental plate. These slabs of rock, also known as “ophiolites,” can contain significant amounts of chromite.
SUKINDA CHROMITE.docx INTRODUCTION Sukinda ultramafic
With a decrease of olivine or pyroxene content, chromite crystals coalesce to form layers of massive ore, and in this case too, the average grain size is less than 1 mm. But in massive ores of podiform type, individual irregular chromite grains commonly exceed 2.5 cm and in rare cases, attain dimensions as large as 15 cm. At places, the massive
About us Oman Chromite
The chromite deposits are confined to the Mantle Sequence and the ultramafic cumulates. The chroimte deposits range in form from tabular or lenticular when least deformed, to podiform when most deformed. Most of the bodies strike parallel to regional structures in the Mantle Sequence rocks. Chromite Mining Activity in Oman.
Chromite — Republished // WIKI 2
Aug 02, 2019 Chromite ore can be mined to produce chromite concentrate.It can also be crushed and processed. Chromite concentrate, when combined with a reductant such as coal or coke and a high temperature furnace can produce ferrochrome. Ferrochrome is a type of ferroalloy that is an alloy in between chromium and iron. This ferroalloy, as well as chromite concentrate can introduce various
