Results 21 to 30 of about 1,123 (149)

Oblique collision and deformation partitioning in the SW Iberian Variscides [PDF]

Solid Earth, 2016
Different transpressional scenarios have been proposed to relate kinematics and complex deformation patterns. We apply the most suitable of them to the Variscan orogeny in SW Iberia, which is characterized by a number of successive left-lateral ...
I. Pérez-Cáceres, J. F. Simancas, D. Martínez Poyatos, A. Azor, F. González Lodeiro   +4 more
doaj   +1 more source

New Late Cretaceous and CAMP Magmatic Sources off West Iberia, From High‐Resolution Magnetic Surveys on the Continental Shelf

Tectonics, Volume 42, Issue 7, July 2023., 2023
Abstract Magma‐poor rifted margins can be affected by magmatic occurrences coeval with rifting and post‐rifting. Understanding the geological processes that originated these magmatic events requires determining their extent, type and size of magmatic bodies and tectonics.
Marta Neres, Pedro Terrinha, João Noiva, Pedro Brito, Marcos Rosa, Luis Batista, Carlos Ribeiro   +6 more
wiley   +1 more source

Cadomian/Pan-African consolidation of the Iberian Massif assessed by its detrital and inherited zircon populations: is the ~610Ma age peak a persistent Cadomian magmatic inheritance or the key to unravel its Pan-African basement?

Geologica Acta, 2022
This work assessed the age distribution of Cadomian/Pan-African orogenic events (550-590 and 605-790Ma, respectively) in several zones of Iberian Massif by means of detrital and inherited zircon analysis compilation. Detrital zircon age spectra show that
Martim Chichorro, Ana Rita Solá, Telmo M. Bento dos Santos, João Lains Amaral, Lourenço Crispim   +4 more
doaj   +1 more source

Toward More Accurate GIC Estimations in the Portuguese Power Network

Space Weather, Volume 21, Issue 6, June 2023., 2023
Abstract New geomagnetically induced current (GIC) computations for mainland Portugal include the entire power network, with network parameters and topology provided by the transmission grid operator for all the high voltage lines (150, 220, and 400 kV). The first 3D conductivity model for the west region of the Iberian Peninsula, based on 31 broadband
Joana Alves Ribeiro, Fernando J. G. Pinheiro, Maria Alexandra Pais, Rute Santos, João Cardoso, Pedro Baltazar‐Soares, Fernando A. Monteiro Santos   +6 more
wiley   +1 more source

Detrital zircon age signatures of the Mesozoic in the Lusitanian Basin and implications for the evolution of Iberia–Newfoundland conjugate margins

Terra Nova, Volume 35, Issue 3, Page 203-212, June 2023., 2023
Abstract New detrital zircon age results from the Lusitanian Basin are integrated with published data for the Mesozoic of west Iberia and eastern Canada (4959 concordant ages). Zircons in new samples are either mainly Devonian‐Permian, Cryogenian‐Ediacaran or reveal a combination of these two age populations, showing secondary to minor Mesoproterozoic ...
Pedro A. Dinis, Pieter Vermesch, Pedro Callapez   +2 more
wiley   +1 more source

Polyphase tectonic reworking of serpentinites and chlorite‐tremolite‐talc rocks (SW Spain) from the subduction forearc to intracontinental emplacement

Journal of Metamorphic Geology, Volume 41, Issue 4, Page 491-523, May 2023., 2023
Abstract The petrostructural and geochronological study of a poorly known ultramafic unit from SW Spain (Badajoz–Córdoba belt) combined with previous structural data permits disclosure of a history of metasomatism, tectono‐metamorphism, reworking and isotopic resetting related to a poly‐orogenic evolution in different geodynamic scenarios.
Benito Ábalos, Pablo Puelles, José Ignacio Gil Ibarguchi   +2 more
wiley   +1 more source

Geochemistry of Precambrian black shales from Ossa‑Morena Zone (Portugal): depositional environment and possible source of metals [PDF]

, 2023
The paleodepositional environments related to Ediacaran black shales from the Série Negra succession in Ossa-Morena tectonostratigraphic zone were investigated using their geochemical composition to identify the sedimentary sources and depositional ...
Nogueira, Pedro, Laranjeira, V., Flores, Deolinda, Nogueira, P., Moreira, N., Ribeiro, J., Laranjeira, Vanessa, Flores, D., Ribeiro, Joana, Moreira, Noel   +9 more
core   +1 more source

Assembly of the Variscan Orogenic Wedge in the Bohemian Massif: Monazite U‐Pb Geochronology of the Tectonic Events Recorded in Saxothuringian Metasediments

Tectonics, Volume 42, Issue 4, April 2023., 2023
Abstract The geochronology of metasediments incorporated to orogenic wedges provides an important key in understanding the early evolution of collisional systems. This study reveals the timing of Variscan processes in the Saxothuringian orogenic wedge, reflecting transition from oceanic to continental subduction and collision.
Marine Jouvent, Vít Peřestý, Petr Jeřábek, Ondrej Lexa, Andrew R. C. Kylander‐Clark   +4 more
wiley   +1 more source

Organic‐walled microfossils from the Kistedalen Formation, Norway: acritarch chronostratigraphy of the Baltic Miaolingian and evolutionary trends of placoid acritarchs

Papers in Palaeontology, Volume 8, Issue 4, July/August 2022., 2022
Abstract New acritarch data from the Kistedalen Formation based on two sections with continuous exposure enable us to establish the most detailed Miaolingian acritarch biozonation in Baltica to date. Six interval zones previously established in Gondwana, the Eliasum llaniscum, Cristallinium cambriense, Adara alea, Timofeevia lancarae, Cristallinium ...
Teodoro Palacios, Anette E. S. Högström, Sören Jensen, Jan Ove R. Ebbestad, Heda Agić, Magne Høyberget, Guido Meinhold, Wendy L. Taylor, Benjamin Bomfleur   +8 more
wiley   +1 more source

Crustal Imbrication in an Alpine Intraplate Mountain Range: A Wide‐Angle Cross‐Section Across the Spanish‐Portuguese Central System

Tectonics, Volume 41, Issue 7, July 2022., 2022
Abstract Intraplate ranges are topographic features that can occur far from plate boundaries, the expected position of orogens as described in the plate tectonics theory. To understand the lithospheric structure of intraplate ranges, we focused on the Spanish‐Portuguese Central System (SPCS), the most outstanding topographic feature in the central ...
I. DeFelipe, P. Ayarza, I. Palomeras, M. Ruiz, J. Andrés, J. Alcalde, D. Martínez Poyatos, F. González Lodeiro, M. Yenes, J. Elez, I. Pérez‐Cáceres, M. Torne, R. Carbonell   +12 more
wiley   +1 more source