|Series||U.S. Geological Survey professional paper -- 290|
Abstract Massive specular hematite ores of the Congonhas district, central Minas Gerais, Brazil, are believed to have been formed by metasomatic replacement of itabirite (quartz-iron oxide rock) and associated dolomite in the central group of the Precambrian Minas by: Get this from a library! Geology and ore deposits of the Alegria District, Minas Gerais, Brazil. [Charles H Maxwell; Brazil. Departamento Nacional da Produção Mineral.]. Year (asc) Year (desc) Author (A-Z) Author (Z-A) Guild, P.W. () Geology and mineral resources of the Conganhas District, Minas Gerais, Brazil. U.S. Geological Survey Professional Paper , 90 pages. Supergene ores, formed by weathering of itabirite (oxide-facies iron formation, averaging 38 percent Fe), are of three intergradational types--enriched itabirite (average 49 percent Fe), intermediate-grade ore (arbitrarily ores with more than 57 percent Fe and less than .
Get this from a library! Geology and mineral resources of the Pico de Itabirito district, Minas Gerais, Brazil. [Roberts M Wallace; Brazil. Departamento Nacional da Produção Mineral.]. Minas Gerais ([ˈminɐz ʒeˈɾajs] ()) is a state in Southeastern ranks as the second most populous, the third by gross domestic product (GDP), and the fourth largest by area in the country. The state's capital and largest city, Belo Horizonte, is a major urban and finance center in Latin America, and the sixth largest municipality in Brazil, after the cities of São Paulo, Rio de. Brazil economic geology iron mineral deposits, Iron deposits of the Congonhas District, Minas Gerais, Brazil Economic Geology Related Book Content. Rare Earth Element Ore Geology of Carbonatites Rare Earth and Critical Elements in Ore Deposits. Critical Elements in Sediment-Hosted Deposits (Clastic-Dominated Zn-Pb-Ag, Mississippi Valley. P.W. GuildGeology and mineral resources of the Congonhas District, Minas Gerais, Brazil. United States Geological Survey Professional Paper () Google Scholar. Guimarães, D. GuimarãesContribuição ao estudo da origem dos depositos de minerio de ferro e manganez do centro de Minas Geraes.
The Águas Claras and Pico Mines are two world-class iron-ore mines hosted within the Lower- Proterozoic banded iron-formations (locally known as itabirites) of the Minas Supergroup located in the Quadrilátero Ferrífero district, Minas Gerais, Brazil. The Águas Claras orebody consists of a 2,m-long roughly tabular-shaped lens hosted within the dolomitic itabirite of the Cauê Formation. Geology and mineral resources of the Pico de Itabirito district, Minas Gerais, Brazil, (Geology and mineral resources of parts of Minas Gerais, Brazil) [Roberts M Wallace] on *FREE* shipping on qualifying : Roberts M Wallace. Get this from a library! Geology and ore deposits of the Itabira district, Minas Gerais, Brazil,. [John Van N Dorr; Aluizio Licinio de Miranda Barbosa; Brazil. Departamento Nacional da Produção Mineral.]. Broken Hill district Gem pegmatites of Minas Gerais, Brazil: exploration, occurrence, and aquamarine deposits. Gems and Gemology, 20(2), Paraíba; Geology and mineral resources of San Diego County, California. California Division of Mines and Geology, County Report 3: p.