Results 271 to 280 of about 165,337 (293)

Study of a Silurian sequence of Dornes region (Central Iberian Zone, Portugal): The contribution of organic petrology and palynofacies

, 2020
A Wenlock (Silurian) sedimentary continuous sequence was sampled in the Dornes region (Central Iberian Zone, Portugal) to characterize the organic matter type using different microscopic analyses (organic petrology and palynofacies). Total organic carbon
P. A. Gonçalves, Sérgio R. Pinheiro, J. G. M. Filho, J. O. Mendonça, D. Flores   +4 more
semanticscholar   +1 more source

Multiphase magmatism and crustal reworking in the Álamo Complex (Central Iberian Zone): evidence from geochemistry and zircon U-Pb geochronology

Geological Magazine
The Álamo Complex, part of the Galician–Castilian Lineament within the Central Iberian Zone, lies between the Ollo de Sapo Domain and the Schist–Greywacke Complex.
A. Pesquera, P. Gil-Crespo, P. Montero, F. Bea   +3 more
semanticscholar   +1 more source

Hercynian transpressional tectonics at the southern margin of the Central Iberian Zone, west Spain

Journal of the Geological Society, 1991
The boundary between the Central Iberian and Ossa-Morena zones, in south-central Spain, occurs within the Badajoz–Cordoba shear zone. The spatial and temporal relationships of structures across the La Codosera syncline, located within the Central Iberian zone just to the north of the shear zone, demonstrate a progressive increase in strike-slip shear ...
D. J. SANDERSON, S. ROBERTS, J. A. McGOWAN, P. GUMIEL   +3 more
openaire   +1 more source

Thoron and radon exhalation and emanation from granitic rocks outcropping in the Central Iberian Zone (Portugal)

Environmental Earth Sciences, 2021
F. Domingos, S. Sêco, A. Pereira
semanticscholar   +1 more source

New lithostratigraphic and tectonic data on the southern border of the Central-Iberian Zone (Portugal)

2023
The geological cartography review of the Portalegre-Serra de S. Mamede region recognized a lithostratigraphic succession from the neoproterozoic to lower carbonic, with similar characteristics to the Amêndoa-Carvoeiro synform. The differences between the two successions occur at the top and near the bottom; lower Carboniferous units (Visean) and in the
Ferreira, Paulo, Romão, Manuel, Dias, Rui, Ribeiro, António   +3 more
openaire   +1 more source

Mafic magmatism in the Central Iberian Zone: Towards a better understanding of Sb mineralization?

2023
This work presents the geochemical and geochronological characterization of mafic sills of the Central-Iberian Zone, in order to unveil their possible relationships with Sb mineralization. These sills are located within three different synclines where several Sb mineralization are observed: La Codosera Syncline (CS) hosts the largest Sb mineralisation ...
Campos-Rodriguez, Hector R., Gloaguen, Eric, Pochon, Anthony, Tuduri, Johann, Sizaret, Stanislas, Higueras, Pablo, Iacono-Marziano, Giada, Lorenzo, Saturnino, Esbrí, José, Poujol, Marc, Mollé, Valentin   +10 more
openaire   +1 more source

Cambrian-Ordovician Transition in the Northern Domains of Central-Iberian Zone; Tectonics Constrains

2023
In the northern sectors of the Central-Iberian Zone the transition of the Lower Ordovician over the underlying sequences always shows evidence of the Toledanian phase. The effects of this pre-Armorican Quartzites deformation are highly heterogeneous.
Dias, Rui, Coke, Carlos, Teixeira, Rui, Ribeiro, António, Amaral, Fábio, Corfu, Fernando   +5 more
openaire   +1 more source

Two contrasting Ordovician and Variscan plutons at Central Iberian Zone (Central Portugal)

2009
Two contrasting Ordovician and Variscan plutons at Central Iberian Zone (Central Portugal).
openaire   +1 more source

Variscan inversion of a Silurian basin: The role of preexisting features on shear zone nucleation (Central Iberian Zone, Iberian Massif)

It is of broad consensus that during Silurian times the seawater anoxia-euxinia levels were enhanced, particularly from the mid Llandovery, often persisting until the Ludlow and Pridoli. The likely stratification of the water column, promoted by the steady Palaeozoic drift conditions, led to the accumulation of organic-rich sediments.
Tereso, Vitor, Dias, Rui, Roseiro, José, Romão, José   +3 more
openaire   +1 more source

Extensional tectonics of the toledo ductile-brittle shear zone, central Iberian Massif

Tectonophysics, 1991
Abstract The Toledo mylonite in the central area of the Iberian Massif represents a major ductile shear zone, only a small part of which has been exposed to view. Mylonites derived largely from migmatite occupy a 300–350 m thick, gently S-dipping zone along the southern margin of the Toledo Crystalline Massif.
openaire   +1 more source