Results 81 to 90 of about 823 (158)

Magnetic mineralogy of Variscan granites from northern Portugal

, 2020
Northern Portugal is characterized by the occurrence of numerous W hydrothermal deposits spatially associated with granites. The primary goal of this work is to establish a relationship between the magnetic behavior of the granites and the redox conditions during magma genesis, as this can influence the occurrence of mineralizations, namely of W (Mo ...
Cruz, Claudia, Sant'Ovaia, H., Noronha, F.   +2 more
openaire   +1 more source

The Saxo-Thuringian Basin of the Central European Variscides: Subsurface Characterization of a Lateral Foreland Basin Based on an Integrated Geophysical Data Set

Tektonika
The lateral extent of subsurface structures and lithologies of ancient orogenies are frequently obscured by younger units, which restricts our understanding of orogenic processes.
Hamed Fazlikhani, Uwe Kroner, Harald Stollhofen, Wolfgang Bauer, Daniel koehn   +4 more
doaj   +1 more source

Source constraints on the genesis of Danubian granites in the South Carpathians Alpine Belt (Romania)

, 2017
peer reviewedThe pre-Alpine basement of the Lower Danubian nappes in the South Carpathians is made up of two Precambrian terranes (Drăgşan and Lainici-Păiuş) that were intruded by Pan-African/Cadomian and Variscan granitoid massifs. We focus on the major
Jean-Clair Duchesne, Duchesne, Jean-Clair, Bernard Bonin, Liégeois, Jean-Paul, Jean-Paul Liégeois, Laurent, Oscar, Mihai Tatu, Oscar Laurent, Tudor Berza, Axel Gerdes, Berza, Tudor, Tatu, Mihai, Gerdes, Axel, Berza, I. Tudor, Bonin, Bernard   +14 more
core   +1 more source

Structure of lamprophyres: a discriminant marker for Variscan and Alpine tectonics in the Argentera-Mercantour Massif, Maritime Alps

BSGF - Earth Sciences Bulletin, 2019
Structural and microstructural analyses are carried out in two sites of the Argentera-Mercantour Massif, Valscura and Val du Haut Boréon, where swarms of lamprophyres intruded into Variscan migmatites and early Permian granitoids. Efforts aim at defining
Filippi Marco, Zanoni Davide, Gosso Guido, Lardeaux Jean-Marc, Verati Chrystèle, Spalla Maria Iole   +5 more
doaj   +1 more source

Mineralogy and petrology of syn-D3 Variscan granites from Santa Comba de Rossas region, northern Portugal

, 2023
Resumo alargadoSUMMARY: In the Santa Comba de Rossas - Paredes area, a granitic complex (G1-G3) was emplaced during the syn-kinematic stages of the Variscan Orogeny, at 317.9 ± 8.7 Ma, as determined by whole rock Rb-Sr dating.
Meireles, Carlos, Silva, Paulo Bravo, Teixeira, R. J. S., Gomes, Maria Elisa Preto   +3 more
core  

The Relationships between the Internal Nappe Zone and the Regional Mylonitic Complex in the NE Variscan Sardinia (Italy): Insight from a New Possible Regional Interpretation?

Geosciences
This study presents an updated interpretation of geological data collected between 1984 and 2022. The area under consideration holds significant regional importance as it is located between the Internal Nappe Zone (INZ) and the Regional Mylonitic Complex
Franco Marco Elter, Federico Mantovani
doaj   +1 more source

Granitoide der europäischen Varisziden : ein Einblick in ihre Platznahme- und tektonometamorphe Geschichte

, 2008
This work analyses several granitic bodies of the Variscan Orogen of Central and Western Europe in order to improve our knowledge about different aspects of their evolution, regarding their ascent and emplacement mechanisms, as well as their deformation ...
Galadí-Enríquez, Elena
core  

The Variscan evolution in the External massifs of the Alps and place in their Variscan framework [PDF]

, 2009
In the general discussion on the Variscan evolution of central Europe the pre-Mesozoic basement of the Alps is, in many cases, only included with hesitation.
Bussy, François, Stampfli, Gérard M., Von Raumer, J.F., Bussy, F., Raumer, Jürgen F. von, Gérard M. Stampfli, Jürgen F. von Raumer, François Bussy, Stampfli, G.M.   +8 more
core   +1 more source

Petrology of the Porriño late-Variscan pluton from NW Iberia. A model for post-tectonic plutons in collisional settings

Geologica Acta, 2017
The Variscan orogen of NW Iberia contains abundant syn- and post-tectonic granitoids. The post-tectonic granitoids are metaluminous to slightly peraluminous, I-type granites, monzogranites ± granodiorites ± tonalites.
L. GONZÁLEZ-MENÉNDEZ, G. GALLASTEGUI, A. CUESTA, P. MONTERO, A. RUBIO-ORDÓÑEZ, J.F. MOLINA, F. BEA   +6 more
doaj  

Rare-metal mineralization and crust-derived magmatism in a collisional orogen: the Variscan metallogenic odyssey of the Sioule region (French Massif Central)

BSGF - Earth Sciences Bulletin
The Sioule region in the northern part of the French Massif Central of the Variscan belt hosts the Echassières complex, where a large W(-Sn) quartz vein system was intruded by the Beauvoir rare-metal granite (RMG) hosting disseminated Sn, Nb-Ta and Li ...
Ballouard Christophe, Carr Patrick A., Monnier Loïs, Fidalgo Jean-Charles, Rocher Océane, Esteves Nicolas, Laurent Oscar, Daoulas-Gérardin Marie, Peiffert Chantal, Declercq Lou, Mercadier Julien, Plunder Alexis, Melleton Jérémie   +12 more
doaj   +1 more source