Results 31 to 40 of about 871 (186)

Cadomian metabasites of the Eastern Pyrenees revisited

Geologica Acta, 2023
This study presents a new geochemical, petrological, and geochronological U-Pb dataset from Ediacaran metabasites and associated rocks of the Canigó and Cap de Creus massifs, Eastern Pyrenees. Metabasites are composed of calcic amphibole + plagioclase +
Núria Pujol-Solà, Josep Maria Casas, Joaquín A. Proenza, Idael F. Blanco-Quintero, Elena Druguet, Montserrat Liesa, Manuel J. Román-Alpiste, J. Javier Álvaro   +7 more
doaj  

The role of the pre-Alpine polycrystalline basement in the paleogeographic configuration of multiple Neotethyan oceanic basins

Geologija, 2021
The study provides a deeper understanding of the early Mesozoic paleogeogeographic spatial-temporal relationship by studying the two Adria-Europe intervening basement blocks.
Darko SPAHIĆ, Tivadar GAUDENYI
doaj   +1 more source

Petrogenesis and tectonic setting of Aftabru-Qlichkandi High-K metaluminous intrusive bodies (South of Buin-Zahra): Evidences from Nd-Sr isotopic Data [PDF]

پترولوژی, 2022
Granites are the most important components of the continental crusts. As an important part of the Alpine-Himalayan global belt and the result of the Tethys evolutionary cycle, the Urmia-Dokhtar Magmatic Arc (UDMA) has formed during different magmatic ...
Hassan Gohari, Mohammad Hassan Karimpour, Hooshang Asadi Haroni, Seyyed Ahmad Mazaheri, Jose Francisco Santos, Tonny Bern Thomsen   +5 more
doaj   +1 more source

Geochemical and Isotopic Evolution of Late Oligocene Magmatism in Quchan, NE Iran

Geochemistry, Geophysics, Geosystems, 2021
Magmatic activity that accompanied the collision between Arabia and Eurasia at ∼27 Ma, provides unique opportunities for understanding the triggers and magma reservoirs for collisional magmatism and its different styles in magmatic fronts and back‐arcs ...
H. S. Moghadam, Q. L. Li, M. Kirchenbaur, D. Garbe‐Schönberg, F. Lucci, W. L. Griffin, G. Ghorbani   +6 more
doaj   +1 more source

Alpine, Variscan, eo-Variscan belts: comparison between hot and cold orogens from the examples of French segments

Comptes Rendus. Géoscience, 2023
The Cenozoic Alpine, and Paleozoic Variscan and eo-Variscan collisional belts are compared in the framework of the Wilson cycle considering differences between cold and hot orogens. The W.
Faure, Michel
doaj   +1 more source

Zircon and apatite U-Pb geochronology of the Paleoproterozoic (Eburnean) basement and late Neoproterozoic (Pan-African) metamorphism and magmatism from Port-Béni, Armorican Massif (France)

BSGF - Earth Sciences Bulletin
By re-examining the historical outcrops of Port-Béni located in the Trégor unit of the North Armorican Cadomian belt, the present work delivers four new ages that provide additional constraints on the Proterozoic history of northern Brittany.
Poujol Marc, Hallot Erwan, Abiven Baptiste, Poulizac Aymeric   +3 more
doaj   +1 more source

Recycling of Paleoproterozoic and Neoproterozoic crust recorded in Lower Paleozoic metasandstones of the Northern Gemericum (Western Carpathians, Slovakia): Evidence from detrital zircons

Geologica Carpathica, 2019
U–Pb (SHRIMP) detrital zircon ages from the Early Paleozoic meta-sedimentary rocks of the Northern Gemericum Unit (the Smrečinka Formation) were used to characterize their provenance.
Vozárová Anna, Rodionov Nickolay, Šarinová Katarína   +2 more
doaj   +1 more source

Tectonostratigraphy of the Mérida Massif reveals a new Cadomian suture zone exposure in Gondwana (SW Iberia)

, 2021
Neoproterozoic and Palaeozoic rocks of the Mérida Massif (SW Iberia) have been grouped into tectonostratigraphic units. Each unit is separated from the rest ones by either crustal-scale thrusts and/or extensional detachments.
Díez Fernández, Rubén, Arenas Martín, Ricardo, Sánchez Martínez, Sonia, Rojo-Pérez, Esther, Fuenlabrada Pérez, José Manuel   +4 more
core   +1 more source

Geochemical and Isotopic Characteristics of the Protolith of Eclogites from the North Shahrekord Metamorphic Complex: Evidence of Late Neoproterozoic Back-arc Basin development in Sanandaj-Sirjan Zone

Journal of Economic Geology, 2019
Introduction All of the major tectonic zones of Iran, except for the Kopet-Dagh, contain Pan-African crystalline basement. Subduction of the Proto-Tethys at about 630 Ma caused Cadomian arc– and backarc magmatism in the northern margin of Gondwana ...
Forough Malek Mahmoudi, Ali Reza Davoudian Dehkordy, Nahid Shabanian Boroujeni, Hossein Azizi   +3 more
doaj   +1 more source

Shifts in the Ediacaran to Lower Ordovician sedimentary zircon provenances of Northwest Gondwana: the Pyrenean files

Geologica Acta, 2022
Detrital zircon grains from Cambrian–Lower Ordovician sandstones and quartzites sampled in the Pyrenees were dated by LA-ICPMS in order to assess their provenance sources.
Maxime Padel, Sébastien Clausen, Marc Poujol, J. Javier Álvaro   +3 more
doaj   +1 more source