Encontrados 20 documentos, a visualizar página 1 de 2
THE ENVIRONMENTAL IMPACT OF USING COPPER SULPHATE TO AVOID GRAPEVINE POWDERY MI...
Patinha, Carla; Reis, Amélia; Dias, Ana; Cachada, Anabela; Pato, Pedro; Ferreira da Silva, Eduardo; Fonseca, Rita; Barriga, Fernando; Janeiro, AnaCopper-based fungicides have been used in vineyards throughout the world, for many decades to protect against downy mildew. However, their use results in an accumulation of Cu in surface soils which can potentially impact on the biological health of the soil and could be transported and stored in the sediments deposited close to valley bottoms. In Douro region, northern of Portugal, vineyards are located on ste...
GRAPEVINE CULTIVATION AND THE GEOCHEMISTRY OF ZINC: IMPACT ON THE ENVIRONMENTAL...
Reis, Amélia; Patinha, Carla; Dias, Ana; Cachada, Anabela; Pato, Pedro; Ferreira da Silva, Eduardo; Fonseca, Rita; Barriga, Fernando; Janeiro, AnaThis study presents preliminary results of a research project that aims assessing the environmental impact of intensive grapevine cultivation in the Alto Douro wine region, a World Heritage Site. A total of 50 soil samples were collected from three nearby vineyards of different ages. Surface drainage of these vineyards discharges into an important water reservoir, the Varosa Dam. The dam collects water from two...
O Complexo Vulcano-Sedimentar de Toca da Moura-Cabrela (Zona de Ossa Morena) : ...
Oliveira, José Tomás; Relvas, Jorge M. R. S.; Pereira, Zélia; Munhá, José; Matos, João Xavier; Barriga, Fernando; Rosa, Carlos J. P.
Aspectos petrográficos do metamorfismo de contacto associado ao plutão granític...
Costa, Isabel Ribeiro da; Antunes, I. M.; Ramos, João Farinha; Recio, C.; Barriga, Fernando; Guimarães, Fernanda M. G.; Ferreira, NarcisoOs granitos marginais e a auréola de contacto do plutão de Penamacor-Monsanto (Zona Centro-Ibérica da Cadeia Varisca) apresentam heterogeneidades texturais e mineralógicas relevantes para a interpretação dos efeitos desta intrusão granítica nos metassedimentos do Complexo Xisto-Grauváquico encaixante, afectados por metamorfismo regional varisco. Variações térmicas e composicionais durante a instalação dos gr...
SEDIMENTAÇÃO EM LAGOS ARTIFICIAIS: DE PROBLEMA A RECURSO, COMO ESTRATÉGIA DE RE...
Fonseca, Rita; Barriga, Fernando J.A.S.Na maior parte do Globo uma grande parte da água utilizada provem de lagos artificiais. Embora as barragens sejam um empreendimento necessário, elas representam uma séria ameaça ambiental devido aos impactos negativos que têm nas bacias de drenagem e no lago que formam, e ao problema que representam no ciclo natural dos sedimentos, ao funcionarem como barreira ao transporte de material até às zonas costeiras. D...
Role of the sediments of two tropical dam reservoirs in the flux of metallic el...
Fonseca, Rita; Patinha, Carla; Barriga, Fernando; Morais, ManuelaIn tropical climates, the high rainfall and temperature, throughout the annual cycle, allow high leaching rates of metallic elements from the basin upstream, which accumulate in the reservoirs. However, the concentration of these elements in natural waters is usually lower than expected, due to the ease of adsorption and co-precipitation in solid phases. We have studied two tropical dam reservoirs in Brazil, Tr...
ECORD-IODP sessions and reception in Lisbon
Barriga, Fernando; Dias, Olga; Pinheiro, Luís; Voelker, Antje H. L.
Compositional trends in tourmalines from granites and quartz-tourmaline rocks f...
Costa, Isabel Ribeiro da; Antunes, I. Margarida H. Ribeiro; Guimarães, Fernanda M. G.; Ramos, João Farinha; Recio, C.; Barriga, Fernando; Mourão, C.
Transition metals responsible for striking colour variation in tourmalines : an...
Costa, Isabel Ribeiro da; Antunes, I. Margarida H. Ribeiro; Guimarães, Fernanda M. G.; Rodrigues, P. C. R.; Barriga, Fernando; Mourão, C.
Geological mineral exploration tools in the Arctic near Loki's Castle, 74 degre...
Barriga, Fernando; Fonseca, Rita; Dias, Ágata; Cruz, Inês; Carvalho, Carlos; Relvas, Jorge; Pederson, RolfDiscovery of the Loki’s Castle hydrothermal vent field (2008) was a great surprise, given its size and vigour of hydrothermal discharge. Several characteristics, including the fauna, separate it from either Atlantic or Pacific-type hydrothermal sites. Concerning size and grades, data are insufficient, but it appears so far that Loki’s Castle is a very large system, about 200 m in diameter. The metal contents (i...
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