Orthogneisses
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. TectÃnica e litogeoquÃmica de rochas supracruciais e ortognaisses a norte e a sul da zona de cisalhamento congo-cruzeiro do nordeste (ParaÃba): um teste da hipÃtese de terrenos no domÃnio central da provÃncia Borborema
The area around Aroeiras, ParaÃba, includes quartz- monzodioritic orthogneisses of paleoproterozoic ages and alkali-feldspar granitic to tonalitic orthogneisses of uncertain ages; metasedimentary sequences and intrusive rocks. The studied lithologies were separated according to its occurrence north or south of the Congo-Cruzeiro do Nordeste Shear Zone (CCNS
Publicado em: 2008
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2. Evolução estrutural brasiliana da Província Borborema na região de Campina Grande, (PB) / Brasilian structural evolution of Borborema Province in the Campina Grande region (PB)
The systematic mapping of Campina Grande sheet (1:100.000) is very important to understand the structural and geochronological relations between different terranes of the Transversal Zone, Borborema Province (NE Brazil). The mapped area is an excellent natural laboratory to apply classical and modern techniques of structural geology for the study of mechanis
Publicado em: 2008
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3. Caracterização geoquímica-isotópica e geocronologia do enxame de diques de Manaíra-Princesa Isabel (PB) - Província Borborema / Geochemical-isotopic characterization and geocronology of the dike swarm of Manaíra-Princesa Isabel region (PB) - Borborema Province
The Manaíra-Princesa Isabel dike swarm forms one of the most expressive Neoproterozoic alkaline magmatism of the Borborema Province (NE Brazil). It consists of about a hundred NE-trending bodies intrusive in Neoproterozoic porphyritic granites (Princesa Isabel and Tavares plutons) and orthogneisses and low grade metasediments of the Eoneoproterozoic Riacho
Publicado em: 2008
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4. 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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5. New U-Pb SHRIMP zircon ages for pre-variscan orthogneisses from Portugal and their bearing on the evolution of the Ossa-Morena tectonic zone
Novas datações pelo método U-Pb SHRIMP em zircão, em dois ortognáisses de Portugal, revelam uma história geológica pré-Varística complexa para o embasamento da Zona Tectônica de Ossa-Morena da Península Ibérica. Os dados geoquímicos e geocronológicos do ortognáisse de Alcáçovas (ca. 540 Ma) indicam que a cristalização magmática do seu pro
Anais da Academia Brasileira de Ciências. Publicado em: 2006-03
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6. Estrutura Petrologia e Geocronologia do Batolito Brejo da Madre de Deus (Estado de Pernambuco), relaÃÃes com a zona de cilhamento Leste , Nordeste do Brasil / Structure Petrologia and Geocronologia of the Batolito Heath of the Madre de Deus (Been of Pernambuco), relations with the cilhamento zone East, Northeast of Brazil
The Brejo da Madre de Deus batholith (BBMD), located in the central eastern part of Pernambuco state, constitutes the central portion of the Caruaru-Arcoverde bathoith, the largest body of the high-K calc-alkalic association in northeastern Brazil. It intrudes dominantly orthogneisses with dioritic to graitic composition and consists of three main facies: co
Publicado em: 2006
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7. Litogeoquimica e controles geocronologicos da suite metamorfica algodões-choro
This thesis proposes an interpretation of the tectonic evolution of the Algodoes-Choro Metamorphic Suite (ACMS) - a paragneiss-amphibolite association intruded by granite-tonalite orthogneisses that crops out in the central region of the Ceara State, NE Brazil. The geological data support the division of this suite in the following units: 1) Algodões amphib
Publicado em: 2000
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8. Evolução geologica dos terrenos de alto grau metamorfico da Faixa Ribeira na região de Juiz de Fora, Minas Gerais
The orthogneisses of the Ribeira Belt, in the Juiz de Fora area, were submitted to a sequence of geologic processes during times previous to Ett Brasiliano (tectono-thermal event), that generated this belt. The present study intends to recover and to reconstitute the geological evolution related to these processes. The units are distributed in two main tecto
Publicado em: 1999
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9. Análise geométrica e cinemática dos metassedimentos da Klippe de Ijaci, Sul de Minas Gerais / não informado pelo autor.
The present work was undertaken in the Ijaci region, southern Minas Gerais state, and involved geological maping, emphasizing geometric and kinematic analysis of the structures in the meta-sedimentary cover. Two litostructural domains were distinguished: the basement domain, composed by granitic and granodioritic orthogneisses, with a steep plunging EW tecto
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/06/1996
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10. Caracterização da "Zona de Sutura" Jacui-Conceição da Aparecida, MG - limite norte do Cinturão Alto Rio Grande : im plicações geotectonicas e metalogeneticas
An are a in the Southwest of Minas Gerais, including the town of Petúnia, was divided into two distinct terrains, namely, Campos Gerais Belt and Petúnia Complex, both collectively called Campos Gerais Complex in earlier works. The former, and older, is an autochtonous terrain regarded as the basement to the latter. It is located in the northern part of the
Publicado em: 1993