Itabirite

itabirite

[‚ēd·ə′bi‚rīt]
(geology)
A laminated, metamorphosed, oxide-facies iron formation in which the original chert or jasper bands have been recrystallized into megascopically distinguished grains of quartz and in which the iron is present as thin layers of hematite, magnetite, or martite.

Itabirite

 

(name derived from Itabira, Brazil), a type of quartzite, rich in iron-ore minerals and containing some muscovite and sometimes fine grains of gold. Itabirite is used as an iron ore.

References in periodicals archive ?
The second wave then took place in the sector, when Vale began processing the friable itabirite ore, with 40% to 60% Fe content.
In Brazil, iron ore is mainly extracted from hematite ores but can also be found in low grade itabirite ores which has iron content in the range of 35%-64%.
He has extensive international experience in iron ore operational design, including plant designs for the Zanaga project in Republic of Congo, MMX and Ponte Verde Itabirite in Brazil, the Lomonosovskoye project in Kazakhstan, the Shymanivske project in the Ukraine and iron ore operations in Chile.
Anglo American will continue to upgrade the confidence in the Compact Itabirite Indicated Mineral Resource through further drilling and will work to increase the Ore Reserves through conversion of these resources.
The Bopolu licence contains two sub-parallel itabirite ore bodies, following the interpretation of remote sensing data, geological maps and historical geological data.
Izvorul Anestilor, Romania, 44[degrees]33, 22[degrees]51 Isla Norte, Chile, -54[degrees]54, -68[degrees]20 Oster Lina, Denmark, 56[degrees]13, 8[degrees]58 Rosentali, Estonia, 59[degrees]11, 26[degrees]38 iron-slate, OED in definition of itabirite Nitella furcata orentalis, Ip Roan Islet, UK, 57[degrees]42, -2[degrees]56 Tsilonera, Greece, 35[degrees]33, 24[degrees]4
The first optimising control system ever installed in a Brazilian concentrator was fully commissioned last March at CVRD's Timbopeba mine to optimise the grinding of a mix of itabirite and hematite ore;
Samarco mines relatively low-grade itabirite iron ore in the State of Minas Gerais in southeastern Brazil.
3 billion of itabirite hematite at 28% iron at Mbalam and 1.
Sundance will then proceed with development and production of the Itabirite deposits.
Concentration of iron ores such as itabirite, hematite, goethite and limonite;
38 billion tonnes of Itabirite at 38 per cent Fe at Mbarga in Cameroon, and we also recently announced that Sundance plans to grow that further through more drilling in 2012.