Chromium Ore Deposits
Magmatic Ore Deposits
Magmatic Ore Deposits: A number of processes that occur during cooling and crystallization of magmatic bodies can lead to the separation and concentration of minerals. 1Pegmatites 2Layered intrusions 3Kimberlites Examples of Magmatic ore deposits: 1Chromite deposits 2Nickel ŒCopper deposits 3Platinum group metal (PGM) deposits
Chromite Deposits in Turkey
Chromite deposits enclosed in the harzburgite mass are classified into three kinds of ore : the disseminated ore partially including the stratiform ore, nodular ore and compact dense ore. The disseminated chromite ore is considered as a variety of harzburgite characterized by the presence of stering finegrained chromite, whereas, the ...
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CHROMIUM ORES ASSOCIATED WITH MAFIC AND ULTRAMAFIC IGNEOUS ROCKS 211 occurin significantamountsin anyassociationthatisbasicin termsofoverall chromite itself is virtually the onlyore mineral,it may show considerable differences in composition within deposits and between deposits ofthe "layered" and "podiform" types: 1.
Refractory and metallurgicaltype chromite ores, Zambales ...
The Zambales ophiolite is the major source of chromite ore in the Philippines. The chromitites are concordant cumulates and are associated with distinct chromititebearing 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 ...
CHROMITE DEPOSITS
Together, these chromite deposits, which are loed in the highly prospective Ring of Fire region, total over 200 million tonnes of measured and indied resources and roughly 50 million tonnes of inferred resources. ... instead on ore imports from South Africa and Pakistan.
Geological features and origin of the chromite deposits of ...
The chromiferous ultramafic rocks of Sukinda Valley (21°0'–21°5'N:85°43'–86°0'E) of Orissa are intrusive into the IronOre Supergroup (2,950–3,200 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 ...
Textures of Ore Deposits
Textures of economic ore deposits I Magmatic ores: 1 Cumulus textures: result from the settling of an ore deposit from a crystallizing magma. The most common example is chromite which occurs as a cumulus phase relative to pyroxenes. Granobalstc texture with cumulate olivine and chromite 2Intergranular or intercumulus textures: where the ore ...
Mineral Ore Deposits: Meaning, Origin and Types | Geology
ADVERTISEMENTS: In this article we will discuss about: 1. Introduction to Ore Deposits 2. Origin of Ore Deposits 3. Types. Introduction to Ore Deposits: Minerals form chief source of all the industrial metals and nonmetals. The commonly used metals like aluminum, copper, iron, lead, zinc etc. are all manufactured using minerals as raw materials. Similarly [.]
Occurrence and Characteristics of Chromite Deposits ...
The chromite deposits of the eastern Bushveld Complex occur in the Critical Zone, a layered pile consisting mainly of pyroxenite, norite, and anorthosite, with minor gabbro, dunite, and harzburgite. With probable reserves in excess of one billion tons, the deposits are among the major mineral resources of .
Chromium Mining and Extraction | Chromium Mining Processing
CHROMIUM : Chromium is the brittle, lustrous and hard chemical element that belongs to the group of spinel. Chromite grains are commonly found in large mafic intrusions and are also found in metamorphic rocks on the earth's crust. Chromite, which is an iron chromium oxide (FeCr2O4) is the only ore present to produce the element chromium.
Chromite | Request PDF
· Sukinda chromite valley is one of the largest chromite deposits of the country and produces nearly 8% of chromite ore. It greatly contributes towards the .
What are the new and effective methods for the exploration ...
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.
USGS Mineral Resources OnLine Spatial Data
Podiform chromite deposits. Loion and characteristics of 1,124 individual podiform chromite mineral deposits, with grade and tonnage models for chromium as well as several related elements. Sedimenthosted gold deposits.
Chromium: Mineral information, data and localities.
Name: From the Greek chroma, color, since all chromium compounds are colored. Type Locality: ⓘ Anduo Cr deposit, Amdo Co. (Anduo Co.), Nagchu Prefecture (Naqu Prefecture), Tibet, China. This page provides mineralogical data about Chromium.
LABORATORY CONCENTRATION OF CHROMITE ORES, RED .
Approximately 30 chromite deposits of varying sizes and grades have been found in the area; those deposits covered by the Star Four, Chrome Queen, Juneau No. 1, and Juneau No. 2 claims were determined to contain significant quantities of ore.
This document is part of a larger publiion
Highalumina chromite, largely from podiform ores, is used in refractory appliions whereas iron and chromiumrich ores, largely from stratiform deposits, are used in metallurgical and chemical appliions. The production of ferrochrome, the main component of stainless steel, accounts for approximately 75% of the world's chromite usage.
Chromite
Chromite, a brownish black cubic mineral belonging to the spinel group, is the only ore mineral from which metallic chromium and chromium compounds are obtained. It has the chemical formula FeCr 2 O 4, and a theoretical composition of % FeO and % Cr 2 O 3.
chromium ore deposits
Magmatic Ore Deposits A number of processes that occur during cooling and crystallization of magmatic bodies can lead to the separation and concentration of minerals. ore mineral of chromium crystallizes from a magma and because it is denser than the magma sinks to the bottom and accumulates in a process called crystal
Chromium Statistics and Information
Chromium (Cr) has a wide range of uses in metals, chemicals, and refractories. It is one of the Nation's most important strategic and critical materials. Chromium use in iron, steel, and nonferrous alloys enhances hardenability and resistance to corrosion and oxidation. The use of chromium to produce stainless steel and nonferrous alloys are two of its more important
Threshold value of Chromite Ore.
• The majority of Chromite resources established in India under various egories is stratiform in nature (97%) and the Sukinda valley chrome ore has higher Fe% than any other deposits in the world due to limonite association. • In South Africa and Turkey, low grade chrome ore have high Cr/Fe due to low Fe content and thus
philippines largest chromite deposit « BINQ Mining
· geology and petrology of the masinloc chromite deposit zambales .. The Masinloc mine, the world's largest producer of refractorygrade chrome ore, is at Goto, Zambales, Luzon, Philippine Islands. . The ore occurs with other chromite deposits in a layered ultramafic complex, intruded by microdiorite and . »More detailed
Ore deposits related to mafic igneous
Ore deposits related to mafic igneous rocks • Range from largest, most extensive igneous petrologic systems in the world (, Bushveld Complex) down to moderatesized bodies like carbonatites. • Magmatic segregation deposits: –formed in intrusive bodies –ore deposits formed during fractional crystallisation • Exceptions:
Extraction of Chromium from Chromite Ore
· Chromite Ore Processing. Lowgrade ore obtained from an open cut trench at a chromite deposit near Auburn, Calif., was treated in the laboratory using gravitymagnetic separation and flotation beneficiation techniques. Flotation using known methods, however, gave very poor results and will not be discussed further in this report.
