Results 81 to 90 of about 592 (175)

The Central Iberian arc: implications for the Iberian Massif

, 2011
Variscan folds and magnetic anomalies of the Central Iberian Zone (Iberian Massif) delineate an orocline similar in size to the Ibero- Armorican arc but of opposite sense of curvature. Its core is occupied by the Galicia-Trás-os-Montes Zone, formed by allochthonous terranes which include the suture of the Rheic Ocean. The West-Asturian- Leonese Zone is
openaire   +1 more source

Petrography and geochemistry of late- to post-Variscan vaugnerite series rocks and calc-alkaline lamprophyres within a cordierite-bearing monzogranite (Sierra Bermeja Pluton, southern Iberian Massif)

Geologica Acta, 2018
The Sierra Bermeja Pluton (southern Central Iberian Zone, Iberian Massif) is a late-Variscan intrusive constituted by cordierite-bearing peraluminous monzogranites.
J. ERRANDONEA-MARTIN, F. SARRIONANDIA, M. CARRACEDO-SÁNCHEZ, J.I. GIL IBARGUCHI, L. EGUÍLUZ   +4 more
doaj  

Zircon and allanite U-Pb ID-TIMS ages of vaugnerites from the Calzadilla pluton, Salamanca (Spain): dating mantle-derived magmatism and post-magmatic subsolidus overprint

Geologica Acta, 2017
Basic to intermediate high-K, high-Mg mantle-derived rocks occur throughout the Iberian Massif and are particularly important in the Tormes Dome, where vaugnerites form several stocks and small plutons. One of the largest and geochemically most variable
F.J. LÓPEZ-MORO, R.L. ROMER, M. LÓPEZ-PLAZA, M. GÓNZALEZ SÁNCHEZ   +3 more
doaj  

The late-Variscan peraluminous Valdepeñas pluton (southern Central Iberian Zone)

Geologica Acta, 2017
The Valdepeñas pluton is the easternmost outcrop of the Cáceres-Valdepeñas magmatic alignment (southern Central Iberian Zone). This massif is constituted by a cordierite-bearing porphyritic monzogranite and may be grouped within the so-called “Serie ...
J. ERRANDONEA-MARTÍN, M. CARRACEDO-SÁNCHEZ, F. SARRIONANDIA, J.F. SANTOS ZALDUEGUI, S. GARCÍA DE MADINABEITIA, J.I. GIL-IBARGUCHI   +5 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

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  

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  

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

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.
openaire   +1 more source

UPbGeoChronSPZ2024: U-Pb data from the South Portuguese Zone, Iberian Massif. [PDF]

Data Brief
Amaral JL, Solá AR, Bento Dos Santos TM.   +2 more
europepmc   +1 more source