Metasedimentary Sequences
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Geocronologia U-Pb em Zircão Detrítico aplicada ao estudo de proveniência de metassedimentos do Complexo Metamórfico Porongos ¿ Região de Santana da Boa Vista, RS
Provenance studies based upon detritic zircon grain U-Th-Pb methodology (LA-ICP-MS) from metasediments of Porongos Metamorphic Complex have determined the existence of two principal source-areas with paleoproterozoic and mesoproterozoic ages to the schists of Arroio Areião, Cerro Cambará and associated quartz mylonites. Where obtained ages between 967 ± 1
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2010
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2. 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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3. 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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4. "Estudo geológico-geocronológico dos terrenos granito-gnáissicos e sequências metavulcanossedimentares da Região do Betara (PR)" / "Geologic-geochronologic study from the granite-gnaissic terranes and metavolcanossedimentary sequences from Betara Region (PR)"
The Betara region was located at nothwest of the Curitiba City between the Campo Largo and Rio Branco do Sul municipal districts. This region includes granite-gnaissic rocks, proto to milonitics (Betara Nucleous) and metavolcanossedimentary sequences with low to intermediate metamorphic grade (Betara Formation). These terrains occur at the southern portion o
Publicado em: 2006
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5. Carbon isotope fluctuations in Precambrian carbonate sequences of several localities in Brazil
Carbon isotope fluctuations in Precambrian sedimentary carbonates between 2.8 Ga and 0.60 Ga in Brazil are examined in this study. The carbonate facies of the BIF of the 2.8 Ga-old Carajás Formation, state of Pará in northern Brazil, has rather homogeneous delta13C (-5 o/ooPDB), compatible with carbonatization of a silicate protolith by a CO2-rich fluid fr
Anais da Academia Brasileira de Ciências. Publicado em: 2000-12
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6. Avaliacao e integracao de dados Landsat-TM, geofisico e geologicos atraves de tecnicas de processamento digital de imagens e sistema de informacoes geograficas / Assessment and integration of TM - Landsat, geophysical and geological data by digitally processed image techniques and geographical information systems
In the present study geological, LANDSAT/TM and geophysical data (aerogammaspectrometry - U, Th, K, CT, U/Th, U/K, Th/K; aeromagnetometry - global magnetic field; gravimetry - Bouguer anomaly) were analyzed and integrated to assimilate and adequate methodologies for geological mapping in which all data can be integrated by digitally processed image technique
Publicado em: 1992