The Cambrian-Early Ordovician rift stage in the Gondwanan units of the Iberian Massif

T Sánchez-García, M Chichorro, AR Solá… - The Geology of Iberia: A …, 2019 - Springer
A rifting stage initiated the Variscan cycle in NW Gondwana, lasted from Terreneuvian to
Early Ordovician times and culminated in opening of the Rheic Ocean. The result of …

Early Ordovician–Devonian passive margin stage in the Gondwanan units of the Iberian Massif

JC Gutiérrez-Marco, JM Piçarra, CA Meireles… - The Geology of Iberia: A …, 2019 - Springer
Progressive opening of the Rheic Ocean led to the drifting away of one or several ribbon
terranes, generally ascribed to Avalonia, and inaugurated a passive margin stage on the …

U–Pb age constraints on the protolith, cooling and exhumation of a Variscan middle crust migmatite complex from the Central Iberian Zone: insights into the Variscan …

JA Ferreira, I Pereira… - Journal of the …, 2022 - lyellcollection.org
The Figueira de Castelo Rodrigo–Lumbrales Anatectic Complex (FCR-LAC) located in the
Central Iberian Zone of the European Variscan Belt is delimited by two shear zones, which …

Magmatic evolution in the N-Gondwana margin related to the opening of the Rheic Ocean—evidence from the Upper Parautochthon of the Galicia-Trás-os-Montes …

Í Dias da Silva, R Díez Fernández… - International Journal of …, 2016 - Springer
Abstract LA-MC-ICP-MS U–Pb zircon ages and whole-rock geochemical data obtained from
volcanic rocks erupted in the northern margin of Gondwana provide new insights on the …

Structural and stratigraphical significance of U–Pb ages from the Mora and Saldanha volcanic complexes (NE Portugal, Iberian Variscides)

Í Dias Da Silva, P Valverde-Vaquero… - Geological Society …, 2014 - lyellcollection.org
Geological mapping and structural investigations were carried out in the eastern rim of the
Morais Allochthonous Complex in NE Portugal (NW Iberian Massif) along the first-order …

Detrital zircon and tectonostratigraphy of the Parautochthon under the Morais Complex (NE Portugal): implications for the Variscan accretionary history of the Iberian …

ÍD Da Silva, U Linnemann, M Hofmann… - Journal of the …, 2015 - lyellcollection.org
Zircon geochronology using laser ablation inductively coupled plasma mass spectrometry,
combined with a new detailed geological map and a stratigraphic study of the …

The collapse of the Variscan belt: a Variscan lateral extrusion thin-skinned structure in NW Iberia

I Dias da Silva, E Gonzalez Clavijo… - International Geology …, 2021 - Taylor & Francis
ABSTRACT The Iberian Massif of the Variscan Belt is a big area of exposed Palaeozoic
rocks holding an S-shaped regional bend. Profuse data and genetic models support the …

Tectonically assisted exhumation and cooling of Variscan granites in an anatectic complex of the Central Iberian Zone, Portugal: constraints from LA-ICP-MS zircon …

JA Ferreira, T Bento dos Santos, I Pereira… - International Journal of …, 2019 - Springer
Understanding the exhumation of middle to lower crustal rocks is of utmost importance to
unravel intracrustal mass transfer processes during orogenic build-up. The Figueira de …

Matérias-primas das ferramentas em pedra lascada da Pré-história do Centro e Nordeste de Portugal

T Aubry, JM Llach, H Matias - Proveniência de materiais …, 2014 - repositorio.ulisboa.pt
Os estudos geológicos desenvolvidos em Portugal desde o último quartel do século XIX
permitiram definir as principais unidades sedimentares da Orla Meso-Cenozóica Ocidental …

Estimating RMR values for underground excavations in a rock mass

V Santos, PF Da Silva, MG Brito - Minerals, 2018 - mdpi.com
During underground excavations for civil or mining engineering purposes, the variations in
rock mass quality are important, especially for the design of the most suitable support to be …