Results 21 to 30 of about 1,408 (212)

Remelting of Ordovician migmatites and granites during Variscan high-grade metamorphism (Aar Massif, Central Alps, Switzerland) [PDF]

Swiss Journal of Geosciences
The remelting of felsic gneisses, migmatites and granite during a later orogenic cycle can produce rocks of different age with comparable field appearance, microstructure, mineralogical and chemical composition.
Urs Schaltegger, Alfons Berger, Jürgen Abrecht, Alexey Ulianov, Eliana Noroña Muñoz, Daniela Rubatto, Maria Ovtcharova, Agathe Martignier, Richard Spikings, Michael Wiederkehr   +9 more
doaj   +3 more sources

New magnetotelluric data through the boundary between the Ossa Morena and Centroiberian Zones [PDF]

, 2005
The south-western part of the Iberian Peninsula, including the southern branch of the Iberian Massif, has recently been the subject of several magnetotelluric (MT) studies.
Almeida, E., Paz, C., Heise, W., Pous, Jaume, Muñoz Soler, Gerard, Monteiro Santos, F., Pous, J., Pous i Fábregas, Jaume, Heise, Wiebke, Paz, Maria Catarina, Muñoz, G., Almeida, Eugénio, Monteiro Santos, F. A., Monteiro Santos, Fernando   +13 more
core   +1 more source

U-Pn geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny [PDF]

, 2003
Within the Caledonides of central Sutherland, Scotland, the Neoproterozoic metasedimentary rocks of the Moine Supergroup record NW-directed D2 ductile thrusting and nappe assembly, accompanied by widespread tight-to-isoclinal folding and amphibolite ...
Kinny, P.D., Strachan, R.A., Rogers, G, Strachan, RA, Paterson, BA, Friend, C.R.L., Kocks, H., Friend, CRL, Paterson, B.A., Kocks, H, Kinny, PD   +10 more
core   +1 more source

FORAMINIFERAL EVIDENCE FOR THE AGE OF EXOTIC BLOCKS WITHIN THE KOPRÍA MÉLANGE, RHODOS (GREECE)

Rivista Italiana di Paleontologia e Stratigrafia, 2005
Blocks embedded within the Kopría Mélange of western Rhodos yield well-preserved, abundant microfossils including early Middle Pennsylvanian fusulinacean faunas represented by species belonging to the genera Eoschubertella, Profusulinella ...
EDUARDO GARZANTI, JOHN R. GROVES, ROBERTO RETTORI   +2 more
doaj   +1 more source

The role of variscan shortening in the control of mineralization deposition in Tadaout-Tizi N’rsas mining district (Eastern Anti-Atlas, Morocco)

Bulletin of the Mineral Research and Exploration, 2020
The abundance of the NE-SW direction veins mineralized in barite, copper, lead and zinc in the Tadaout-Tizi n’Rsas (TTR) anticline make this area one of the principal vein fields in Tafilalet (easternmost border of the Eastern Anti-Atlas).
Mustapha AIT DAOUD, Abdelhafid ESSALHI, Mourad ESSALHI, Abdeslam TOUMMITE   +3 more
doaj   +1 more source

A few remarks on the Triassic paleogeography and geodynamic link between the Dinarides an the Serbo-Macedonian unit [PDF]

Geološki Anali Balkanskoga Poluostrva, 2020
A recently recycled tectonic hypothesis in which the Serbo-Macedonian Unit rifted off during Ladinian from the Dinarides is tested. The Triassic rifting, according to this concept, led to the opening and the formation of a northwestern branch of ...
Spahić Darko, Gaudenyi Tivadar
doaj   +1 more source

Niemcza diorites and moznodiorites (Sudetes, SW Poland): a record of changing geotectonic setting at ca. 340 Ma [PDF]

, 2013
Granites sensu lato in the Sudetes intruded in several episodes during the Variscan orogeny recording different stages of crust and mantle evolution.
Kierczak, J., Pietranik, A., Kierczak, Jakub, Storey, C., Pietranik, Anna, Storey, Craig   +5 more
core   +1 more source

Petrogenetic constraints on the felsic vein magmatism in northern Portugal based on petrological and geochemical data

Comptes Rendus. Géoscience, 2021
Three of the largest granite porphyries of northern Portugal were studied to improve current knowledge on the regional felsic vein hypabyssal magmatism.
Oliveira, António João Teixeira, Martins, Helena Cristina Brites, da Silva, Helena Maria Sant’Ovaia Mendes   +2 more
doaj   +1 more source

U-Pb geochronology of the Fort Augustus granite gneiss: constraints on the timing of Neoproterozoic and Palaeozoic tectonothermal events in the NW Highlands of Scotland [PDF]

, 2001
The West Highland granite gneiss suite in Inverness-shire, Scotland, represents a series of S-type, anatectic granites formed by partial melting of host Neoproterozoic metasediments of the Moine Supergroup.
Kinny, P.D., Strachan, R.A., P. D. KINNY, Strachan, RA, Paterson, BA, Friend, C.R.L., Paterson, B.A., Kinny, PD, Rogerson, G., C. R. L. FRIEND, Rogers, G, G. ROGERS, Friend, CRL, R. A. STRACHAN, B. A. PATERSON   +14 more
core   +1 more source

⁴⁰Ar ∕ ³⁹Ar age constraints on the formation of fluid-rich quartz veins from the NW Rhenohercynian zone (Rursee area, Germany) [PDF]

Geochronology
A substantial part of the subsurface geology in northwestern and central Europe is defined by the late Palaeozoic Variscan Orogeny (∼ 350 Ma). Our focus is mainly on veining in anchimetamorphic sedimentary rocks affected by this orogeny.
A. A. O. Huseynov, J. Wijbrans, K. Kuiper, J. van der Lubbe   +3 more
doaj   +1 more source