 | | Journal (article/letter/editorial) | | high-strain domain of the Quadrilátero Ferrı́fero, Brazil, hard and soft high-grade hematite ore may occur...are almost entirely constituted of oriented specularite platelets that develop both as a product of crystal–plastic...of fluid inclusions from specularite crystals of the Conceição and Timbopeba deposits, located in the...thrusting the Paleoproterozoic platform sequence of the Minas Supergroup over Mesoproterozoic quartzites of the...synclines, with Paleoproterozoic metasediments of the Minas Supergroup separated by antiformal structures and |  | | Journal (article/letter/editorial) | | Relations in Iron Ores from the Iron Quadrangle, Brazil: The Correlation of Oxygen Isotope Variations with...hematite-rich ore bodies in the Iron Quadrangle, Brazil. The area studied can be divided into two different...peak metamorphic conditions of the Proterozoic Minas metamorphism 2,000 m.y. ago. Iron ores which have...quartz iron formations - known as itabirites in Brazil - appears to have been a dominant process in the...such as those found in the Iron Quadrangle, Minas Gerais, Brazil. While these ores comprise only a few per |  | | Journal (article/letter/editorial) | | STUDIES: THE EXAMPLE OF THE CONCEIÇÃO MINE, QUADRILÁTERO FERRÍFERO, BRAZIL CARLOS ALBERTO ROSIÈRE† Instituto... Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte MG, Brazil AND FRANCISCO JAVIER RIOS...(CDTN-CNEN), Cx. Postal 941, 30123-970 Belo Horizonte MG, Brazil Abstract Petrographic and textural analysis combined...northeastern part of the Quadrilátero Ferrífero, Brazil, indicate a complex process of oxidation and mineralization...thereafter platy hematite crystals (hematite III and specularite) forming schistose orebodies. Quartz veins that |  | | Journal (article/letter/editorial) | | HEMATITE ORES WITH OF HEMATITE C. I•. BRAZIL ORES LEITH AND OF AND E. A COMPARISON LAKE SUPERIOR... C. HARDER. The iron ores of the Minas Geraes district of Brazil are more nearly like the Lake Superioriron...SHOWING r• Fro. •o. •HADED AREA INDICATE8 GERAES• BRAZIl, THE • •O THE IRON ORE DISTRICT. KM, •e...showingthe situationof the zron ore district of Minas Geraes, Brazil. The districtis beingmappedfor the BrazilianGeological... HEMATITE examination of this field. ORES OF BRAZIL. 67 x We were able to confirm the essential |  | | Journal (volume) | | Deposits in the Carajás Mineral Province, Pará State, Brazil Rosaline Figueiredo e Silva, Lydia Maria Lobato...educated Dutch geologist and permanent resident of Brazil with an M.Sc. degree in metamorphic geology, under...in the Espinhaço Range and has worked widely in Brazil and shield South America, mainly on exploration...geologic, mineral resources, and geotectonic map of Brazil, published in 4 sheets and in DVDGIS format with...the CSIRO in roles including science adviser for mine processing. He previously advised companies such |  | | Journal (article/letter/editorial) | | in 2010; around 80% of it came from Australia, Brazil, China, and India (Jorgensen 2011). The origin...they gave rise to large deposits of iron ore in Brazil, especially where the source iron formation (known...at all but form duricrusts, such as the canga of Brazil. Others are found along unconformities that represent...Whaleback mine in Western Australia in 2007. The pit is 5 km long and the largest single-pit iron mine in the...PR IL 2011 Pico mine with working equipment in the Quadrilátero Ferrífero, Brazil, in 2000. The main |  | | Book | | iron ore production, followed by Australia and Brazil with their combined production of 919 Mt in 2012...2013 being about 820 Mt/a, largely from Australia, Brazil, South Africa, Canada, and India. The three largest...largest iron ore producers in the world are Vale in Brazil and Rio Tinto and BHP Billiton with operations...3000 2500 World iron ore production Australia Brazil China (estimated) 2000 1500 1000 500 0 1990 1995...ore and iron content, followed very closely by Brazil with slightly higher in situ iron grades. Russia |
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