The Itabirites of the Quadrilatero Ferrifero and Related High …
DOI: 10.5382/rev.15.09 Corpus ID: 133251981; The Itabirites of the Quadrilatero Ferrifero and Related High-Grade Iron Ore Deposits: An Overview @inproceedings{Rosire2008TheIO, title={The Itabirites of the Quadrilatero Ferrifero and Related High-Grade Iron Ore Deposits: An Overview}, author={Carlos Alberto Rosi{`e}re …
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Banded Iron Formation-Related High-Grade Iron Ore
During the first stage metamorphic fluids leached SiO 2 and carbonates and mobilized iron, which resulted in the formation of massive magnetite bodies, Fe oxide veins, and Fe-rich itabirite bodies; during the second stage, low-temperature, low-salinity fluids caused oxidation of magnetite and Fe-rich dolomite to hematite. The resulting ore is ...
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Keys to best practice comminution
The first is the undertaking by mineral processing academics at the Universities of Toronto, and Alberta, to teach the methods described in this paper to the next generation of mineral process engineers. ... Comparing strategies for grinding itabirite iron ores in autogenous and semi-autogenous pilot-scale mills. Minerals Engineering, Volume …
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Putu Iron Ore Project
The Mineral Development Agreement for the project was formally approved by the Liberian Government in September 2010. ... Iron minerals within the Putu deposit consist pre-dominantly of magnetite-itabirite. A thick layer of haematite-itabirite lies over the magnetite-itabirite minerals. Mineralisation is high in grade and very high regionally.
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(PDF) MINERAL LIBERATION EVOLUTION AFTER …
PDF | On Feb 1, 2019, Rodrigo Fina Ferreira and others published MINERAL LIBERATION EVOLUTION AFTER DIFFERENT DEGREES OF COMMINUTION ON ITABIRITES | Find, read and cite all the research …
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From Fresh Itabirites and Carbonates to Weathered Iron Ore: Mineral …
pact Itabirite Project" has focused on mineral characterization, rock porosity estimation and density quantification, using weathered and non-weathered samples. The aim of
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HONGSHIITE, PtCu, FROM ITABIRITE-HOSTED Au–Pd–Pt …
hosted by itabirite of the Paleoproterozoic Itabira Iron Formation at the Cauê and Conceição iron ore mines. A number of platinum-group minerals found as inclusions in hongshiite also are described, including the second occurrence of sudovikovite (Polekhovskii et al. 1997). Although bearing no direct relation to hongshiite, a
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The Itabirites of the Quadrilatero Ferrifero and …
Chemical evolution and hydrothermal processes during the genesis of itabrite-hosted, high grade iron ore in the Quadrilatero Ferrifero, Brazil. Banded Iron Formation (BIF)-hosted …
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The "itabirite" iron ores of Brazil
The "itabirite" iron ores of Brazil. Economic Geology (1914) 9 (2): 101–111. This content is PDF only. Please click on the PDF icon to access.
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Geology, Geochemistry, and Origin of the Nimba Itabirite …
The upper 700 m of the tightly folded and metamorphosed 1,400-m-thick Precambrian metavolcanic-metasedimentary Nimba Supergroup of northeastern Liberia, West Africa, …
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Beneficiation Route for the Amphibolitic Itabirite átero …
Keywords: amphibolitic itabirite; goethite; iron ore; magnetic concentration; flotation 1. Introduction Iron ore is the second-most traded mineral commodity on the market, mainly for the manufacture of cast iron and steel (98% of the world production) [1–3]. It corresponds to 15% of the products
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Minerals | Free Full-Text | Holistic Pre-Feasibility Study of
Comminution is an essential step in processing itabirite ores, given the need to liberate silica and other contaminants from the iron minerals for downstream concentration and then pellet feed production. In general, these ores in Brazil are not particularly hard to crush and grind, but both capital (CAPEx) and operating (OPEx) …
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A review of the mineral potential of Liberia
Liberia has large resources of itabirite-type iron ores, most of which are located in the Liberian terrane, and was the largest producer in Africa prior to the onset of civil war in 1989. ... Phlogopite, tremolite, chlorite and talc alteration is associated with the mineralisation. A mineral resource (measured + inferred) containing 901,000 ...
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Sundance Resources Limited
The term itabirite was first coined in Brazil to describe a number of major hematite orebodies in Brazil's southern system. Itabirite mineralisation is a metamorphosed iron formation composed of iron oxides (hematite, magnetite, martite), abundant quartz, very rarely mica and other accessory minerals.
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Banded Iron Formation-Related High-Grade Iron Ore
Metamorphosed iron formations, referred to as itabirites, are found in three compositionally distinct lithofacies, namely quartz itabirite, dolomitic itabirite, and …
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(PDF) Proposal for an Environmentally Sustainable …
Quartz liberation in regard to the iron minerals of amphibolitic itabirite. 3.4. Proposal of the Beneficiation Route. Based on the physical, chemical and mineralogical characterization of the ...
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Minerals | Free Full-Text | From Fresh Itabirites and …
The siliceous lithotypes (compact quartz itabirite, friable quartz itabirite, and rich, friable quartz itabirite) have quartz as the main non-ferrous mineral and low content …
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Mineralogy and genesis of rare Al-phosphate …
Mineralogy and genesis of rare Al-phosphate minerals in weathered itabirite and iron ore from the Quadrilátero Ferrífero, Minas Gerais, Brazil - ScienceDirect. …
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(PDF) MINERAL LIBERATION EVOLUTION AFTER DIFFERENT DEGREES …
This paper presents a mineral liberation study on two iron ore samples from the Quadrilátero Ferrífero, in Brazil: compact itabirite of low-grade metamorphism (CI) and friable itabirite of high ...
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(PDF) MINERAL LIBERATION EVOLUTION AFTER DIFFERENT …
The followingcompositional types occur: quartz itabirite, being metamorphic jaspilites, dolomitic itabirite, beingdolomitized banded iron formations, and amphibolitic itabirite modified by the ...
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Minerals | Free Full-Text | Proposal for an Environmentally
The average value of moisture (wet basis) of the amphibolitic itabirite sample was 10% (standard deviation of 0.5), which is consistent with the moisture values of hydrated ores in Quadrilátero Ferrífero (6% to 10%), attributed to the presence of porous goethite and martitic hematite varieties, which retain moisture due to the high porosity ...
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a Hand specimen of dolomitic itabirite.
Apatite is the major P-bearing mineral in unweathered itabirite, occurring as a trace mineral (Morgan et al., 2013;Spier et al., 2007). In hypogene iron ore, ...
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(PDF) Caracterização mineralógica e textural do itabirito e …
The circulation of large fluid volumes that cause the systematic decrease of 18O/16O ratios from itabirite to high-grade iron ore requires the presence of, e.g. extensive faults and/or large-scale ...
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(PDF) Geochemistry of hematitite and itabirite
Iron minerals, including magnetite, are able to accumulate rare earth elements up to tens ppm, which has been examined in iron oxides of different age and genesis (Rhodes et al., 1999; Selmi et al ...
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Study on Partial Replacement of Metal Grinding Ball with …
lower grade ores, such as friable and compact itabirite, materials that are the focus of this study. In addition, compact itabirite has led to a significant increase in grinding media consumption when compared with friable itabirite ore [4,5]. Grinding usually accounts for most of the energy consumption in ore processing plants [6].
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Solid Mineral Resources | SpringerLink
Nigeria as a nation is blessed with abundant solid mineral resources distributed fairly in all the states of the federation (Fig. 10.1; Table 10.1).According to reports by the Geological Survey of Nigeria …
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Indirect estimate of in loco moisture via normative …
The Mineralogical Normative Calculation (MNC), proposed in early 1900s for igneous rocks, was adapted to the mineral assemblage of itabirite-hosted iron ores of the Quadrilátero Ferrífero, taking into account the distribution of …
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Samarco Iron Ore Mine, Alegria, Brazil
Mineral Type. Itabirite, haematite and magnetite. Reserve Base. 720Mt (2005) Annual Production. 15.1Mt iron-ore products (2005) Mining Method. Open pit. ... Alegria's certified mineral reserves totalled 769MT by 30 June 2009 graded at 44.3% Fe. Probable resources stood at 821Mt at 41.5% Fe. Measured resources totalled 1238Mt at …
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Karst-bauxite formation during the Great Oxidation Event
Itabirite is a metamorphosed rock of alternating bands rich in either hematite or magnetite, and bands rich in gangue minerals, mostly quartz. The Cauê Itabirite and the Gandarela Formation ...
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Geology and geochemistry of the Águas Claras and Pico Iron …
Gangue minerals are very rare in the high-grade ores, but are slightly more common in the iron-rich itabirite. Quartz is the dominant gangue mineral, and is found with minor quantities of chlorite. The chemistry of the high-grade ores is characterized by high Fe contents (an average of 67.0%) and low P, Al 2 O 3, and SiO 2, which are ...
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