Igneous Intrusions
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Nepheline syenites to syenites and granitic rocks of the Itatiaia Alkaline Massif, Southeastern Brazil: new geological insights into a migratory ring Complex
ABSTRACT: The Itatiaia Alkaline Massif comprises some of the largest meso-cenozoic alkaline igneous occurrences in Brazil, covering over 215 km2 between the states of Minas Gerais and Rio de Janeiro. It appears as an elongated, 30-km long and 4.5-11.5-km wide SE-NW-trending body emplaced along accommodation zones of the Continental Rift of Southern Brazil, i
Braz. J. Geol.. Publicado em: 21/05/2018
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2. Mapeamento sísmico de intrusões ígneas na bacia do Amazonas e suas implicações para um modelo não-convencional de geração de hidrocarbonetos / Seismic mapping of igneous intrusions in the Amazon basin and its implications for a model of unconventional hydrocarbon generation
A maioria das bacias paleozóicas brasileiras apresenta matéria orgânica termicamente pouco evoluída nos intervalos correspondentes ao Devoniano. O modelo mais adequado para se entender a geração, migração e acumulação de HC estaria relacionado às fases de intrusão de diabásio. No caso da Bacia do Amazonas, embora tenha havido condições de sote
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/09/2012
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3. CALFRAC: Programa que quantifica o processo de cristalização fracionada e sua aplicação ao estudo de soleiras da Bacia do Paraná (Estado do Paraná) / CALFRAC: Program to quantify fractional crystallization processes and your application in the study Paraná Basin sills (Paraná).
CALFRAC is a computer program written in C++ programming language developed to quantify fractional crystallization processes in igneous systems. Major, minor and trace element concentrations are used as input for calculations. The new algorithm enhances and makes the program more efficient than those published in the literature. Besides it is capable to auto
Publicado em: 2010
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4. O deposito de oxido de ferro-cobre-ouro bacaba, provincia mineral de Carajas, PA : geocronologia U-Pb das rochas hospedeiras / Iron oxide-Cu-Au bacaba deposit, Carajas mineral province (PA), Brazil : U-Pb geocronology of the host rocks
The Bacaba iron oxidecoppergold deposit, situated in the Itacaiúnas Shear Belt, Carajás Mineral Province (Brazil), represents a satellite prospect of the world-class Sossego deposit, and might also represent a distal and deeper portion of the same or related hydrothermal system. The Bacaba deposit is located along a WNWESE-striking shear zone that de
Publicado em: 2010
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5. Geração não convencional de hidocarbonetos na região carbonífera de Santa Catarina / Non-conventional generation of hydrocarbons in the coal zone from Santa Catarina
Na região de Lauro Müller, sul de Santa Catarina, a presença de óleo nos arenitos das formações Rio Bonito e Palermo foi observada em diversos poços e nas galerias de uma das minas da Carbonífera Catarinense. Amostras desse óleo foram submetidas às análises de isótopos estáveis de carbono e cromatografia gasosa espectrometria de massas visando,
Publicado em: 2009
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6. Petrography and mineral chemisty from Indaiá I and Indaiá II intrusions, western Minas Gerais State / Petrografia e química mineral das intrusões Indaiá I e Indaiá II, oeste do Estado de Minas Gerais
An integrated petrographic and mineral chemistry study has been carried out on ultramafic, potassic to ultrapotassic and silica-undersaturated rocks of kimberlitic affinity of the Indaiá I and Indaiá II intrusions, Western Minas Gerais State, Brazil. These rocks outcrop at the Alto Paranaíba Igneous Province (PIAP), within a N30W-trending, elongated area,
Publicado em: 2008
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7. Avaliação do efeito térmico das soleiras de diabásio nas rochas geradoras da formação Irati (Bacia do Paraná, Brasil) através de técnicas de modelagem numérica / Assessment of the thermal effects of diabase sills on source rocks of Irati formation (Parana, Basin, Brazil) using numerical modeling techniques
To evaluate the thermal maturity and thermal history of source rocks in basins with magmatic activity it is important to consider the thermal effects imposed by igneous intrusions, such as sills and dykes. This work uses the finite difference method for such evaluation, with the transient numerical analysis of heat conduction from Cretaceous diabase sills in
Publicado em: 2006
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8. Petrogenese das intrusões graniticas compostas de Teofilandia e Barrocas, Greenstone Belt do Rio Itapicuru, Bahia, Brasil
The Rio Itapicuru Greenstone Belt (RIGB) is a Paleoproteozoic sequence situated in the northern portion of the São Francisco Craton, Bahia state, Brazil. Overlying a basement consisting of gnaisse and migmatites, this volcanic-sedimentary belt is intruded by several granitoid intrusions of different chemical compositions. Two of the most important intrusive
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2002
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9. Estudo de mineralizações de tipo Cu-porfiro do sul do Peru por meio de sensoriamento remoto e aeromagnetometria
A large number of mineral deposits are known in the Andes, including Cu-porphyry deposits. Among these, Cuajone, Quellaveco and Toquepala are some of the most important in the southern portion of Peru. They are located in the domain ofthe Bolivian Orocline, within the Incapuquio shear zone, a structure that controls the mineralization, ofabout 60 Ma. Airborn
Publicado em: 2002
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10. Magnetotelluric investigation of the lithosphere in the Alto Paranaíba Ígneous Province / Investigação magnetotelúrica da litosfera na província Ígnea do Alto Paranaíba
Magnetotelluric (MT)soundings are presented for the region of Alto Paranaíba Igneous Province (APIP), an important Cretaceous diamondiferous province in western Minas Gerais State. In addition to conventional wideband soundings, suitable for crustal scale investigations, long period MT systems were used to investigate the mantle lithosphere. This study is f
Publicado em: 2001
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11. Mecanismos de alojamento de magmas granitóides :exemplo do plúton de Japi(RN)
This dissertation describes the igneous suites of the Japi granitoid pluton, intrusive in the Paleoproterozoic gneiss-migmatite complex of the eastern domain of the Seridó Belt, northeastern Brazil. Field relations show that the pluton is affected by strong deformation associated to the Brasiliano orogeny (known as the D3 phase) , with a NW-trending extensi
Publicado em: 1998
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12. Petrologia dos granitóides brasilianos associados à zona de cisalhamento Remígio-Pocinhos(PB)
The Brasiliano Cycle in the Seridó Belt (NE Brazil) is regarded mostly as a crustal reworking event, characterized by transcurrent or transpressional shear zones which operated under high temperature and low pressure conditions. In the eastern domain of this belt- the so-called São José de Campestre Massif (SJCM), a transtensional deformation regime is ev
Publicado em: 1998