Tectonic Evolution
Mostrando 13-24 de 65 artigos, teses e dissertações.
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13. Geocronologia e evolução tectônica paleo-mesoproterozoica do oriente boliviano - região sudoeste do craton amazônico / Paleo-mesoproterozoic Tectonic Evolution and Geocronology of Eastern Bolivia, SW Amazonian Craton
This work characterizes the tectonic and magmatic evolution of the Precambrian shield of Bolivia. The complex geological evolution of the eastern Bolivia extends from the Paleo- to Mesoproterozoic, and can be related with the magmatic and metamorphic events that are ascribed to the Rio Negro - Juruena (1.78-1.60 Ga), Rondonian - San Ignacio (1.56-1.30 Ga) an
Publicado em: 2010
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14. Termobarometria, evolução tectono-metamórfica, e geoquímica de xistos azuis, rochas eclogíticas e litotipos associados da Ilha Diego de Almagro, Patagônia Chilena / Thermobarometry, tectonic-metamorphic evolution and geochemistry of blueschists, eclogitic rocks and associated lithotypes of Diego de Almagro Island, Chilean Patagonia
Na ilha Diego de Almagro, localizada na Patagônia Chilena, ocorrem metabasitos de alta pressão que compõem, juntamente com metatufos, xistos cloríticos, metacherts (coticulitos), xistos micáceos, xistos grafitosos e quartzo micaxistos, uma seqüência metavulcanossedimentar. Relíquias de pillow lavas com tufos finos inter pillow e camadas com pillow br
Publicado em: 2010
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15. Morphological and structural constraints on the dynamics of the river basin of the River Benevente - Espírito Santo / Condicionantes morfológicos e estruturais na dinâmica fluvial da bacia hidrográfica do Rio Benevente - Espírito Santo
The study of watersheds in the humid tropical environment, has acquired great importance in recent decades due to growing demand for water resources planning. However, many studies have confused the concept of watersheds, believing that this was simply a network of interconnected channels that form the hydrography of the land, thus making it as simple cartog
Publicado em: 2009
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16. 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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17. 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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18. Análise tectono-estratigráfica da Faixa de dobramento Paraguai meridional na Serra da Bodoquena e depressão do Rio Miranda, MS / Tectonostratigraphic analysis of the southern Paraguay fold belt in Serra da Bodoquena and Rio Miranda depression, MS
This work aims to characterize the geological and structural context of the Southern Paraguay Folded Belt, and to understand the stratigraphic relationships between the Puga Formation, Corumbá and Cuiabá groups. Regional geological reconnaissance work and detailed geological-structural field sections were carried out, with petrographic and structural analy
Publicado em: 2009
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19. Estimativa de espessura crustal na Província Borborema (NE/Brasil) através de função do recpetor
Crustal thickness and VP/VS estimates are essential to the studies of subsurface geological structures and also to the understanding of the regional tectonic evolution of a given area. In this dissertation, we use the Langstons (1979) Receiver Function Method using teleseismic events reaching the seismographic station with angles close to the vertical. In th
Publicado em: 2008
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20. Caracterização tectono-estratigráfica da sequência transicional na sub-bacia de Sergipe
This thesis deals with the tectonic-stratigraphic evolution of the Transitional Sequence in the Sergipe Sub-basin (the southern segment of the Sergipe-Alagoas Basin, Northeast Brazil), deposited in the time interval of the upper Alagoas/Aptian stage. Sequence boundaries and higher order internal sequences were identified, as well as the structures that affec
Publicado em: 2008
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21. Structural geology of northern limb of the Paraiba do Sul river divergent structure: cross-sections Três Rios (RJ) - Matias Barbosa (MG) and Barra do Piraí - Conservatória (RJ) / Geologia estrutural da aba norte da estrutura divergente do rio Paraíba do Sul: seções Três Rios (RJ) - Matias Barbosa (MG) e Barra do Piraí - Conservatório (RJ)
This study is about the structural geology of a portion of the Central Mantiqueira Province which corresponds to the north side of the structural divergence of the Rio Paraíba do Sul valley. Two geological cross-sections (Três Rios - Matias Barbosa and Barra do Piraí - Conservatória) provided geometrical and kinematics data. Lattice preferred orientation
Publicado em: 2008
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22. Estruturas tectônicas cenozóicas na porção leste da Bacia Potiguar - RN
This thesis encompasses the integration of geological, geophysical, and seismological data in the east part of the Potiguar basin, northeastern Brazil. The northeastern region is located in South American passive margin, which exhibits important areas that present neotectonic activity. The definition of the chronology of events, geometry of structures genera
Publicado em: 2008
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23. Geotermobarometria, geoquímica, geocronologia e evolução tectônica das rochas da fácies xisto azul da Colômbia nas áreas de Jambaló (Cauca) e Barragán (Valle del Cauca) / Geothermobarometry, geochemistry, geocronology and tectonic evolution of blueschists facies rocks in Jambaló (Cauca) and Barragan (Valle del Cauca) areas, Colômbia
Apesar da importância das rochas da fácies xisto azul para o entendimento da dinâmica das zonas de subducção no passado, pouquíssimos estudos de mapeamento, geoquímica, geotermobarometria, geocronologia e de evolução tectônica têm sido feitos em rochas desse tipo na Colômbia. Na Cordilheira Central dos Andes colombianos ocorrem duas unidades roch
Publicado em: 2008
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24. A história do intemperismo na Província Borborema Oriental, Nordeste do Brasil: implicações paleoclimáticas e tectônicas
Until some years ago, weathering geochronology was primarily based on the K-Ar and 40Ar/39Ar dating of supergene minerals. Recent advances in the analysis of supergene goethite by the (U-Th)/He method expanded the number of suitable minerals for such purpose, as well as the time of application for weathering geochronology. This study represents the first sys
Publicado em: 2008