Zobrazeno 1 - 10 of 16 pro vyhledávání: '"João Farinha Ramos"'
1
Long-lived magmatic systems and implications on the recognition of granite–pegmatite genetic relations: Characterization of the Pavia granitic pegmatites (Ossa-Morena Zone, Portugal)
Autor: Ana Margarida R. Neiva, A. Cuesta, S. M. Lima, João Farinha Ramos
Publikováno v: Geochemistry. 74:625-639
It is generally accepted that pegmatites are derived from large masses of granite but, even in areas where complete mineralogical, chemical and isotopic datasets are available, the relation between pegmatites and host granitic rocks or nearby plutons
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cfd75edd917c1bbba00ed03380546e77
https://doi.org/10.1016/j.chemer.2014.02.003
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2
Petrogenetic links between lepidolite-subtype aplite-pegmatite, aplite veins and associated granites at Segura (central Portugal)
Autor: Isabel Margarida Horta Ribeiro Antunes, João Farinha Ramos, Ana Margarida R. Neiva, Fernando Corfu, Maria Manuela Silva, Paulo Silva
Publikováno v: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Agência para a Sociedade do Conhecimento (UMIC)-FCT-Sociedade da Informação
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
In the Segura area, Variscan S-type granites, aplite veins and lepidolite-subtype granitic aplite-pegmatite veins intruded the Cambrian schist-metagraywacke complex. The granites are syn D3. Aplite veins also intruded the granites. Two-mica granite a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13656ea09bad00125a612a034c633410
https://doi.org/10.1016/j.chemer.2012.12.003
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3
'Schist' from Trás-os-Montes and Alto Douro (NE of Portugal): Potential Use as Natural Stone
Autor: Fernando Noronha, António Casal Moura, João Farinha Ramos, Cristina Carvalho, Sílvia Aires
Publikováno v: Key Engineering Materials. 548:205-211
The main purpose of this work was to increase the knowledge about the geological resources of Trás-os-Montes and Alto Douro region (TMAD), particularly about their “schists” (slate, phyllite and schist), due to the economic and social effects th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::54078b69983281ed616477f87dea0409
https://doi.org/10.4028/www.scientific.net/kem.548.205
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4
The Example of the Quartzite from the 'Upper Quartzite Formation' from Trás-os-Montes and Alto Douro (Northern Portugal); Its Characterization to Use as Natural Stone
Autor: Cristina Carvalho, Sílvia Aires, Fernando Noronha, António Casal Moura, João Farinha Ramos
Publikováno v: Key Engineering Materials. 548:212-219
Metaquartzite from Serra da Garraia and Zebras were studied. These rocks belong to the "Upper Quartzite Formation" of the “Parautochthonous Complex”. They are light grey and present, sometimes, a brownish patina. The quarries range from 2 to 10m
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8906bb4823a6955cb154acfae02c161b
https://doi.org/10.4028/www.scientific.net/kem.548.212
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5
Dissecting Complex Magmatic Processes: an in-depth U–Pb Study of the Pavia Pluton, Ossa–Morena Zone, Portugal
Autor: Ana Margarida R. Neiva, João Farinha Ramos, Fernando Corfu, S. M. Lima
Publikováno v: Journal of Petrology. 53:1887-1911
The build-up of large magmatic complexes can proceed piecemeal over periods of several million years through sequences of complex processes of magma production, differentiation, assimilation, final crystallization and subsequent metasomatic modificat
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::08365a1cc78c4802674631f08e1f8b6c
https://doi.org/10.1093/petrology/egs037
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6
U-Pb ID-TIMS dating applied to U-rich inclusions in garnet
Autor: João Farinha Ramos, S. M. Lima, Fernando Corfu, Ana Margarida R. Neiva
Publikováno v: American Mineralogist. 97:800-806
Garnet has long been recognized as an important mineral in metamorphic petrology thanks to its widespread distribution and successful use in the reconstruction of P-T-t paths. However, the potential of garnet to solve geological problems may have bee
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1cb2d1a68aa275b67e3174e6c9992074
https://doi.org/10.2138/am.2012.3930
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7
Sequential melting and fractional crystallization: Granites from Guarda-Sabugal area, central Portugal
Autor: Fernando Corfu, Ana Margarida R. Neiva, João Farinha Ramos, Paulo Silva
Publikováno v: Geochemistry. 71:227-245
Seven distinct phases of Variscan two-mica granite are recognized in the Guarda-Sabugal area. They intruded the Cambrian schist-metagraywacke complex, crystallized in the middle crust, and are syn- to late-D3 (309.2 ± 1.8 Ma), late-D3 (304–300 Ma)
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a09928b3469720b9f7eb71417ff3a993
https://doi.org/10.1016/j.chemer.2011.06.002
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8
Combined U–Pb geochronology and Lu–Hf isotope systematics by LAM–ICPMS of zircons from granites and metasedimentary rocks of Carrazeda de Ansiães and Sabugal areas, Portugal, to constrain granite sources
Autor: Paulo Silva, M. E. P. Gomes, Tom Andersen, R. J. S. Teixeira, João Farinha Ramos, Ana Margarida R. Neiva
Publikováno v: Lithos. 125:321-334
The Carrazeda de Ansiaes and Sabugal areas in the Central Iberian Zone of the Iberian Variscan Belt contain abundant S-type granites formed during the post-thickening stage of the Variscan orogeny (syn- to post-D3, i.e. the last ductile deformation p
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::721f09080cf06c60910aa27ed39aa1e1
https://doi.org/10.1016/j.lithos.2011.02.015
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9
Geochemistry of granitic aplite-pegmatite sills and petrogenetic links with granites, Guarda-Belmonte area, central Portugal
Autor: Ana Margarida R. Neiva, João Farinha Ramos
Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Granitic amblygonite-subtype and lepidolite-subtype, aplite-pegmatite sills intruded a biotite>muscovite granite (G1). Two other biotite>muscovite granites (G2 and G3) and a muscovite>biotite granite (G4) crop out in the area. Variation diagrams for
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d4a1b45075c629a7c05f50230ac3c37
https://doi.org/10.1127/0935-1221/2010/0022-2072
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10
Geochemical and isotopic constraints on the petrogenesis of Early Ordovician granodiorite and Variscan two-mica granites from the Gouveia area, central Portugal
Autor: M. E. P. Gomes, Ana Margarida R. Neiva, Maria Manuela Silva, Ian S. Williams, Isabel Margarida Horta Ribeiro Antunes, João Farinha Ramos
Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Agência para a Sociedade do Conhecimento (UMIC)-FCT-Sociedade da Informação
A biotite granodiorite and seven Sn-bearing two-mica granites crop out in the Gouveia area, central Portugal. A SHRIMP U–Th–Pb zircon age from the granodiorite, and monazite ages from four of the two-mica granites, show that they are of Early Ord
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dae92a89504da4381917b158dd3ddd7b
https://doi.org/10.1016/j.lithos.2009.01.005
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