A Type Granites
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Geochemical signatures and weathering rates in soils derived from different granites in contrasting climatic locations
ABSTRACT. We studied the mineralogical properties and chemical composition of different granites using energy dispersive X-ray spectroscopy coupled with scanning electron microscopy to understand the relationship between granite signatures and soil characteristics, including weathering patterns and soil fertility status. The discriminant analysis (DA) was ba
Acta Sci., Agron.. Publicado em: 17/12/2018
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2. Geology, petrography and geochemistry of the A-type granites from the Morro Redondo Complex (PR-SC), southern Brazil, Graciosa Province
O Complexo Morro Redondo é uma das ocorrências mais importantes da Província Graciosa de tipo-A, sul do Brasil. É constituído pelos plútons graníticos Papanduva e Quiriri e uma associação vulcânica bimodal contemporânea. O Plúton Papanduva inclui álcali-feldspato granitos peralcalinos maciços e deformados, com anfibólios e clinopiroxênios de
An. Acad. Bras. Ciênc.. Publicado em: 2014-03
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3. On dynamic self-organization: examples from magmatic and other geochemical systems
Standard Liesegang banding is the display of parallel bands of precipitate formed periodically when co-precipitate ions interdiffuse in a gel medium. The most striking resemblance with Liesegang patterns in Nature lies in the diverse scenery of banded textural features commonly observed in some geological materials, such as geodes, agates, malachites, as wel
Lat. Am. j. solids struct.. Publicado em: 2013-01
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4. Caracterização do maciço Santa Clara no município de Cujubim (RO) com base em litogeoquímica, geocronologia e estudos isotópicos / Characterization of the Santa Clara massif in Curubim (RO) based on lithogeochemistry, geochronology and isotopic analysis
A Suíte Intrusiva Santa Clara está inserida na Província Estanífera de Rondônia, na porção SW do Cráton Amazônico. Essa suíte intrusiva é composta pelos maciços Santa Clara, Oriente Velho, Oriente Novo, Manteiga-Sul, Manteiga-Norte, Jararaca, Carmelo, Primavera e das Antas. Os litotipos que perfazem a Suíte Santa Clara ocorrem hospedados nas roc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/06/2012
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5. Caracterização petrográfica e geoquímica da parte leste do Granito Europa, Distrito Mineiro de Pitinga, AM
The important mineral deposits of the Pitinga Mine, in the Amazonian region are related to A-type granites intruded in the Iricoumé Group. The Europa granite is one of these A-type rocks, intruded in the Iricoumé Group, which is represented by subaerial vulcanoclastic rocks (crystal-rich ignimbrites, thin massive tuffs and siltic tufaceous arenites) and mi
Publicado em: 2010
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6. Evolução magmática, alteração hidrotermal e gênese da mineralização de ouro e cobre do Palito, Província Aurífera do Tapajós (PA) / Magmatic evolution, hydrothermal alteration and geneseis of gold-copper mineralization at Palito, Tapajós Gold Province (PA)
The Palito porphyry type copper-gold deposit is located in the central region of the Amazonian craton, in the Tapajós Gold Province (TGP), in an area that is dominated by intermediate to felsic granitic and volcanic rocks of late Paleoproterozoic age. Three lithotypes make up this deposit. The Palito Granite, with porphyritic features, is the host rock for
Publicado em: 2010
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7. Geologia do Terreno Paranaguá / Geology of Paranaguá Terrane
The Paranaguá Terrane is composed of precambrian geological units distributed in a NE-SW elongated swath, about 250 km long and 30 km wide, in south-southeastern Brazil, within the States of São Paulo (Nothern Paranaguá Terrane), Paraná and Santa Catarina (Southern Paranaguá Terrane). This terrane is constituted mainly by an igneous complex, represented
Publicado em: 2009
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8. Estratigrafia e petrogênese das sequências vulcânicas paleoproterozóicas na região de São Félix do Xingu (PA), Província Mineral de Carajás / Stratigraphy and petrogenesis of the paleoproterozoic volcanic sequences in the São Félix do Xingu (PA) region, Carajás Mineral Province
Near the São Félix do Xingu city, centersouth portion of the Pará state, in the context of the Carajás Mineral Province, occur extensive Paleoproterozoic volcanoplutonism (1.88 1.87 Ga) exceptionally well-preserved and grouped in the Sobreiro and Santa Rosa formations. These suites are generically correlated to Uatumã Supergroup volcanoplutonism, a magm
Publicado em: 2009
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9. Características de campo, petrografia e litogeoquímica da Unidade Santo Aleixo em sua localidade-tipo / Field geology, petrography and lithogeochemistry of Santo Aleixo Unit in its type location
The Santo Aleixo Unit in its type-location is represented by homogenous gneiss and subordinated banded and inclused mafic-felsic-rich gneisses, all rocks separated by gradational contacts. Leucogranitic gneiss, migmatites, late-tectonic granite stocks and diabase dikes also occur in the studied area. The gneissic foliation dips to SE or NW with low to medium
Publicado em: 2008
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10. Geoquímica de rocha total, geocronologia de u-pb e geologia isotópica de sm-nd das rochas ortognáissicas e unidades litológicas associadas da região ipameri - Catalão (Goiás)
The part of the southern Brasília Belt, Tocantins Province, exposed in central Brazil, comprises metasedimentary rocks, metavolcano-sedimentary sequences, amphibolites and intrusive granites, and a large orthogneiss belt. These units are tectonically imbricated, and vary in metamorphic grade from lower greenschist to amphibolite facies, characterized by a 7
Publicado em: 2008
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11. The Serra da Graciosa A-type granites and syenites, southern Brazil. Part 1: regional setting and geological characterization
A região da Serra da Graciosa inclui importantes ocorrências de granitos e sienitos da Província Graciosa de Tipo-A (originalmente chamada de Suite Serra do Mar), Sul do Brasil. Com base em trabalho de campo, petrografia, e imagens de sensoriamento remoto, é feita a caracterização dos plútons da região. Cinco plútons independentes são reconhecidos.
Anais da Academia Brasileira de Ciências. Publicado em: 2007-09
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12. Petrologia e metalogenia do Depósito de Cobre Bom Jardim de Goiás (GO)
The Bom Jardim de Goiás Deposit is located at western Goiás State, on the western border of the Arenópolis magmatic arc. A reserve of 4,575,660 t, containing 0,92% Cu, was estimated by Serviço Geológico do Brasil (CPRM). The country rocks comprise vulcanoclastic rocks assigned to the Córrego da Aldeia formation from the Bom Jardim de Goiás Group, with
Publicado em: 2007