Results 111 to 120 of about 1,932 (208)

Variscan deformation of the Hesperian massif in the Lousã mountain range (central Portugal) [PDF]

, 2004
[Abstract] The occidental region of the Central-Iberian Zone of the Variscan Iberian massif, in the central part of Portugal (Lousã mountain range), has a Variscan tectonostructural organization as the one recognized in the occidental border of the ...
Gomes, E. M. C., Sequeira, A.J.D., Gama Pereira, Luis C.   +2 more
core  

Late Cambrian magmatic arc activity in peri-Gondwana: geochemical evidence from the Basal Allochthonous Units of NW Iberia

Geologica Acta, 2017
The North African section of the Gondwana margin was the site of voluminous, arc-related magmatism during the Late Neoproterozoic (Avalonian–Cadomian orogen).
P. ANDONAEGUI, J. ABATI, R. DÍEZ FERNÁNDEZ   +2 more
doaj  

Tonalites from the Hospitais massif (Ossa-Morena Zone, SW Iberian Massif, Portugal) II: Geochemistry and petrogenesis

, 2004
Como se ha descrito en la primera parte del trabajo (Moita et al. en este volumen), el Macizo de Hospitais pertenece a una serie magmática sinorogénica Varisca intruida en un complejo de gneises y migmatitas perteneciente a los Terrenos de Alto-grado Metamórfico de Évora. Se han utilizado datos geoquímicos de las tonalitas, de los enclaves dioríticos y
Moita, P., Santos, J. F., Pereira, M. F.
openaire   +2 more sources

New U-Pb SHRIMP zircon ages for pre-variscan orthogneisses from Portugal and their bearing on the evolution of the Ossa-Morena tectonic zone

Anais da Academia Brasileira de Ciências, 2006
New SHRIMP U-Pb zircon ages for the Portalegre and Alcáçovas orthogneisses document a complex pre- Variscan history for the Iberian basement in Portugal. The available geochemical and geochronological data for the Alcáçovas orthogneiss (ca.
Cordani Umberto G., Nutman Allen P., Andrade Antonio S., Santos José F., Azevedo Maria do Rosário, Mendes Maria Helena, Pinto Manuel S.   +6 more
doaj  

A two-stage collision in the origin of Pangea: Evidences in NW Iberian Massif

, 2015
Abstract of an oral presentation in a ...
Arenas, R., Sánchez Martínez, S., Díez Fernández, R., Gerdes, A., Albert, R., Fernández-Suárez, J., Andonaegui, P.   +6 more
openaire   +1 more source

Fluid inclusions in magmatic ilmenite record degassing in basic magmas

Communications Earth & Environment
Magmatic volatile phases play a major role in igneous systems, but indirect sampling of the magmatic fluid, especially for basic magmas, remains challenging to document.
Anthony Pochon, Daniel J. Kontak, Giada Iacono-Marziano, Eric Gloaguen, Johann Tuduri, Tom Chatelin, Jacques Précigout, Héctor Campos Rodríguez, Valentin Mollé, Blandine Gourcerol, Loïs Monnier   +10 more
doaj   +1 more source

An oxygen isotope record of lacustrine opal from a European Maar indicates climatic stability during the Last Interglacial

, 2001
The penultimate temperate period, 127–110 ka before present (BP), bracketed by abrupt shifts of the global climate system initiating and terminating it, is considered as an analogue of the Holocene because of a similar low global ice‐volume.
Rietti-Shati, M, de Beaulieu, J, Svobodova, H, Reille, M, Shemesh, A, Battarbee, RW, Rioual, P, Andrieu, V   +7 more
core  

Structural contributions on the Tamames syncline: Schist and Greywacke Domain of the Central Iberian Zone (Iberian Massif) [PDF]

, 2017
Un estudio estructural del sector oriental del sinclinal de Tamames, en la Zona Centro Ibérica (ZCI) del Macizo Ibérico, evidencia que la foliación tectónica asociada a los pliegues mayores es una crenulación que, por su relación temporal con el ...
Gómez Barreiro, Juan, Martínez Catalán, José R., González Clavijo, Emilio J., Martín García, Guillermo   +3 more
core  

Correlation of hercynian units of the Iberian massif and southeastern France

, 1996
The Olio de sapo anliform in the northwest Iberian Massif is made up of superposed allochthonous units of Paleozoic metasediments and Ordovician orthogneisses, similar to gneissic domes in the eastern Pyrenees and in the Montagne Noire of southern France.
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Silurian conodonts of the Obejo-Valsequillo Domain (SW of the Iberian Massif)

, 2016
Peer ...
Aragonés-Illanas, Pau, Sarmiento, Graciela N., Gutiérrez-Marco, J. C.   +2 more
openaire   +1 more source