Artigo Publicado em Periódico (IGEO): Envíos recientes

Mostrando ítems 21-40 de 358

On the baroclinic structure of the Brazil Current–Intermediate Western Boundary Current system at 22°–23°S

Cirano, M.; Silveira, I. C. A. da; Castro, B. M.; Lima, J. A. M.; Mascarenhas, A. d. S. (Brasil, 2004)

[1] The baroclinic structure of the Brazil Current(BC)-Intermediate Western Boundary Current (IWBC) at 22°–23°S was investigated. A reanalysis of the pioneer velocity profile measurements of the TRANSCOBRA Experiment [Evans ...
Geologia e arcabouço estrutural da Sequência Metavulcanossedimentar Urandi, Bahia

Figueiredo, Bruno Santos; Cruz, Simone Cerqueira Pereira; Ribeiro, Paulo Alexandre; Fleck, André (Brasil, 2013)

A Sequência Metavulcanossedimentar Urandi (SMU) encontra-se na porção setentrional do Orógeno Araçuaí, tendo como embasamento as rochas do Complexo Santa Isabel. Essa unidade representa uma das sequências metavulcanossedimentares ...
ReefBahia, an integrated GIS approach for coral reef conservation in Bahia, Brazil

Carvalho, Rafael Cabral; Ruy, Kenji Papa de Kikuchi (2013)

Coral reefs around the world are facing serious threats. These fragile ecosystems are in need for conservation. The coastal state of Bahia hosts the most extensive and richest area of coral reefs in the South Atlantic ...
Mapeamento geológico da zona costeira limitada pela foz do rio Pojuca e a praia de Imbassaí, Mata de São João – Bahia

Almeida Junior, Marcus Vinicius Costa; Anjos, José Angelo Sebastião Araújo dos; Sampaio, Flavio José (Brasil, 2013)

A pesquisa objetivou realizar um mapeamento geológico, na escala 1:25.000, da zona costeira entre a foz do rio Pojuca e a praia de Imbassaí, Mata de São João - BA, com o intuito de subsidiar o planejamento ambiental da ...
Chemostratigraphic correlation of Neoproterozoic successions in South America

Misi, Aroldo; Kaufman, Alan J.; Veizer, Jàn; Powis, Kelli; Azmy, Karem; Boggiani, Paulo Cesar; Gaucher, Claudio; Teixeira, João Batista Guimarães; Sanches, Andreia L.; Iyer, Sundaram Sankara Subba (2007)

The Neoproterozoic successions of South America largely accumulated during extensional events associated with the breakup of Rodinia. These units are preserved as thick carbonate and siliciclastic strata in epicontinental ...
Benthic foraminifera associated with the South Bahia Coral Reefs, Brazil

Araújo, Helisângela Acris Borges De; Machado, Altair De Jesus (Brasil, 2008)

The objective of this study was to assess foraminiferal faunas and their relationship to sediment texture and composition in the reef areas from the coastline to the 30-m isobath between the cities of Corumbau and Nova ...
Chemical effects on the soil–plant system in a secondary treated wastewater irrigated coffee plantation—A pilot field study in Brazil

Herpin, Uwe; Gloaguen, Thomas Vincent; Fonseca, Adriel Ferreira da; Montes, Célia Regina; Mendonça, Fernando Campos; Piveli, Roque Passos; Breulmann, Gerhard; Forti, Maria Cristina; Melfi, Adolpho José (2007)

Wastewater reuse in agriculture is recognized worldwide as an alternative water and/or nutrient source. In this study, secondary treated wastewater (STW) from an anaerobic/facultative pond system at the city of Lins (São ...
Re–Os age constraints and new observations of Proterozoic glacial deposits in the Vazante Group, Brazil

Geboy, Nicholas J.; Kaufman, Alan J.; Walker, Richard J.; Misi, Aroldo; Oliviera, Tolentino Flavio de; Miller, Kristen E.; Azmy, Karem; Kendall, Brian; Poulton, Simon W. (2013)

A new Re–Os radiometric age date for an organic-rich shale horizon from the Vazante Group in Brazil, coupled with geological observations, provide evidence for late Mesoproterozoic glacial episodes, conflicting with the ...
The narrow, shallow, low-accommodation shelf of central Brazil: sedimentology, evolution, and human uses

Dominguez, José Maria Landim; Silva, Rian Pereira da; Nunes, Alina Sá; Freire, Antonio Fernando Menezes (2013)

The continental shelf off the coast of central Brazil, extending from 10 to 16°S, is unusually narrow (~ 20 km) and rests on the São Francisco craton. The shelf break is located between the 45 and 50 m isobaths and coincides ...
Paleoproterozoic potassic–ultrapotassic magmatism: Morro do Afonso Syenite Pluton, Bahia, Brazil

Rios, D. C.; Conceição, H.; Davis, D. W.; Cid, J. Plá; Rosa, M. L. S.; Macambira, Moacir José Buenano; McReath, I.; Marinho, M. M.; Davis, W. J. (2007)

The Morro do Afonso Syenitic Pluton (MASP) is a small, bimodal suite of lamprophyric and syenitic rocks, located in the Serrinha Nucleus, São Francisco Craton, northeastern Brazil. The unit consists predominantly of alkali ...
Sedimentation in the coastal reefs of Abrolhos over the last decades

Silva, A. S.; Leão, Zelinda Margarida de Andrade Nery; Kikuchi, Ruy Kenji Papa de; Costa, A. B.; Souza, José Roberto Bispo de (2013)

Coral reefs of the coastal area of Abrolhos are located in an environment with a high influx of terrigenous sediments that are carried out to the sea, either as a result of natural processes (river output, coastal erosion, ...
Corrosion resistance and glass forming ability of Fe47Co7Cr15M9Si5B15Y2 (M=Mo, Nb) amorphous alloys

Souza, Carlos Alberto Caldas de; Bolfarini, Claudomiro; Botta Filho, Walter Jose; Lima, Luiz Rogério Pinho de Andrade; Oliveira, Marcelo Falcão de; Kiminami, Claudio Shyinti (Brasil, 2013)

In the present work the effect of substituting Mo with Nb on the glass forming ability and corrosion resistance of Fe-Co-Cr-M-Si-B-Y (M=Mo, Nb) ribbons with high corrosion resistance is investigated. The X-ray powder ...
First precise U–Pb baddeleyite ages of 1500 Ma mafic dykes from the São Francisco Craton, Brazil, and tectonic implications

Silveira, E. M.; Söderlund, U.; Oliveira, E. P.; Ernst, R. E.; Leal, A. B. Menezes (2013)

The São Francisco Craton (SFC) is an Archaean–Proterozoic craton that hosts a significant number of mafic intrusions. Previous attempts to date the igneous emplacement of these rocks are limited to a few poor precision ...
Evolução crustal do setor ocidental do Bloco Arqueano Gavião, Cráton do São Francisco, com base em evidências U-Pb, Sm-Nd e Rb-Sr

Barbosa, Natali da Silva; Teixeira, Wilson; Leal, Luiz Rogério Bastos; Leal, Angela Beatriz de Menezes (Brasil, 2013)

O Bloco Gavião Oeste, Cráton do São Francisco, um dos segmentos mais primitivos da Plataforma Sul-Americana, é constituído pelos complexos Gnáissico Migmatítico Riacho de Santana e Santa Isabel, além do greenstone belt ...
Tolerance of Brazilian brain coral Mussismilia braziliensis to sediment and organic matter inputs

Loiola, Miguel; Oliveira, Marília de Dirceu Machado de; Kikuchi, Ruy Kenji Papa de (2013)

In Brazil, where reefs occur in markedly turbid environments, the relationship between sedimentation/organic matter and corals is poorly known. Thus, the ex situ effects of sediment with and without organic matter over the ...
Rapid expansion and pseudo spectral implementation for reverse time migration in VTI media

Pestana, Reynam da Cruz; Ursin, Bjorn; Stoffa, Paul L. (2012)

In isotropic media, we use the scalar acoustic wave equation to perform reverse time migration (RTM) of the recorded pressure wavefield data. In anisotropic media, P- and SV-waves are coupled, and the elastic wave equation ...
A kinetic study on bacterial sulfate reduction

Bernardez, L. A.; Lima, Luiz Rogério Pinho de Andrade; Jesus, E. B. de; Ramos, C. L. S.; Almeida, Paulo Fernando de (2013)

The activity of anaerobic sulfate reduction was studied using sulfate-reducing bacteria isolated from the water produced from a Brazilian oil reservoir. The effects of the initial sulfate concentration on the anaerobic ...
Evaluation of the effects of metals on biodegradation of total petroleum hydrocarbons

Moreira, Icaro T. A.; Oliveira, Olívia Maria Cordeiro de; Triguis, Jorge Alberto; Queiroz, Antônio Fernando de Souza; Barbosa, Ronaldo Montenegro; Anjos, José Angelo Sebastião Araújo dos; Reyes, Claudia Y.; Silva, Carine S.; Trindade, Maria C. L. F.; Rios, Mariana C. (2013)

In the present paper, the efficiency of biodegradation of petroleum hydrocarbons in the presence of metals in mangroves sediments was evaluated. Two models of remediation (intrinsic bioremediation and phytoremediation) ...
Estimation of hydraulic parameters of shaly sandstone aquifers from geoelectrical measurements

Lima, Olivar Antônio Lima de; Niwas, Sri (Journal of Hydrology, 2000)

Electrical and hydraulic conductivities of shaly sandstones are described using a capillary approach for a granular, clay bearing material. The clays are assumed to occur as shale shells uniformly coating the insulated ...
Storage of carbon dioxide in geological reservoirs: is it a cleaner technology?

Câmara, George Augusto Batista; Andrade, Célio Silveira; Silva Júnior, Antônio; Rocha, Paulo (Journal of Cleaner Production, 2013)

Increased anthropogenic emissions and accumulation of greenhouse gases (GHGs) in the atmosphere have led to climate change, which has become a major global environmental concern. The effects of anthropogenic GHG emissions ...

Mostrando ítems 21-40 de 358

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