Browsing by Issue Date, starting with "2012-02"
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- Occupational exposure to dust in open pit mining. A short reviewPublication . Matos, Maria Luísa Ferreira; Baptista, João Santos; Diogo, M. Tato
- Exposure to fibres in the occupational environmentPublication . Matos, Maria Luísa Ferreira; Santos, Paula; Barbosa, Fernando
- High primary productivity in the Northeast Pacific during the Last Glacial Maximum indicated by diatom transfer functionsPublication . Lopes, Cristina Isabel; Mix, Alan C.; Kucera, Milan
- Investigação das descargas de águas subterrâneas em meio marinho : uma abordagem multidisciplinar (Projecto FREEZE)Publication . Carrara, Gabriela; Fernandes, Judite; Terrinha, Pedro; Amaral, Helena; Gonçalves, João Noiva; Duarte, Henrique; Costa, Augusto Marques da; Melo, Maria Teresa Condesso de; Stigter, Tibor; Bronzini, Simona; Leitão, Francisco; Range, Pedro; Piló, David; Encarnação, João; Chicharo, Alexandra; Chicharo, Luís; Sousa, Fátima; Nascimento, Ângela; Sebastião, Luís; Pinheiro, Luís M.; Gonçalves, Daniela; Magalhães, Vítor Hugo; Azevedo, Leonardo; Dill, Amélia Carvalho; Monteiro, José Paulo
- Aplicação de uma metodologia multidisciplinar para a caracterização da contaminação das águas subterrâneas por contaminantes orgânicos : resultados preliminares e análise comparativa de dois casos de estudo (Estarreja e Seixal) no âmbito do projecto CRUDE (FCT)Publication . Melo, Maria Teresa Condesso de; Neves, Célia; Ordens, Carlos Miraldo; Barreiras, Nuno; Fernandes, Judite; Amaral, Helena; Ramalho, Elsa; Batista, Maria Joao; Gonçalves, Cláudia; Almeida, José António; Quental, Paulo; Brito, Graça; Viana, Paula; Gama, Ana Cláudia; André, Sandra; Silva, Eduardo; Granjeia, Carlos; Inácio, Manuela; Silva, Manuel Marques da; Patinha, Carla; Matias, Manuel João Senos; Khalil, Mohamed; Santos, Fernando Monteiro; Danko, António; Pereira, Paula Sá
- Geochemistry of granitic aplite-pegmatite veins and sills and their minerals from the Sabugal area, central PortugalPublication . Neiva, A.M.R.; Silva, Paulo Bravo; Ramos, João FarinhaGranitic beryl-columbite-phosphate subtype aplite-pegmatite veins and sills from the Sabugal area intruded a biotite > muscovite granite which is related to another two-mica granite. Variation diagrams of major and trace elements of whole rocks show fractionation trends. REE patterns and δ18O of whole rocks, BaO and P2O5 contents of K-feldspar, anorthite and P2O5 contents of plagioclase, major element and Li contents of muscovite and lithian muscovite support this series. Least squares analysis of major elements indicate that the biotite > muscovite granite and aplite-pegmatite veins and sills are derived from the earlier two-mica granite magma by fractional crystallization of quartz, plagioclase, K-feldspar, biotite and ilmenite. Modelling of trace elements shows that magmatic fl uxes and fl uids controlled the Rb, Sr and Ba contents of aplite-pegmatites, probably also lithium micas (zinnwaldite, polylithionite and rare lepidolite), cassiterite, columbite-tantalite, fl uorapatite and triplite. In aplite-pegmatites, lithian muscovite replaces primary muscovite and late lithium micas replace lithian muscovite. Complexely zoned columbite crystals are chemically characterized and attributed to disequilibrium conditions. Relations of granites and aplite-pegmatites and pegmatites from other Portuguese and Spanish areas are compared. The granitic aplite-pegmatites from Sabugal are moderately fractionated and the granitic complex type aplite-pegmatites from Gonçalo are the richest in Li and Sn, derived from a higher degree of fractional crystallization and fl uxes and fl uids control the Ba and Rb behaviours and Li, Sn, F and Ta concentrations.
- Metodologia para cartografar águas salgadas e salobras aprisionadas em formações geológicas : Beira, MoçambiquePublication . Fernandes, Judite; Ramalho, Elsa; Batista, Maria Joao; Dias, Ruben Pereira; Oliveira, José Tomás; Quental, Lídia; Daudi, Elias Félix; Milisse, Dino; Cune, Grácio; Ussene, Ussene Vasco; Manhiça, Vítor