Results 21 to 30 of about 110 (106)

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

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

Geochronology and detrital zircons sources from the Sierra Albarrana Domain (SW Iberian Massif)

Geogaceta, 2023
This study compiles the U-Pb and 40Ar/39Ar geochronology of the metasedimentary, migmatitic and granitic rocks of the Sierra Albarrana Domain, based on data recently published by the authors together with other bibliographic sources.
Byron Solis Alulima, Jacobo Abati Gómez, Alicia López Carmona, Gabriel Gutiérrez Alonso, Javier Fernández Suárez   +4 more
doaj   +1 more source

Foreword: The Ediacaran-early Palaeozoic Cadomian zircon province fringing Northwest Gondwana

Geologica Acta, 2023
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J. Javier Álvaro, Martim Chichorro, Gabriel Gutierrez-Alonso   +2 more
doaj  

Seismic imaging of the critical zone of dolerite dykes at Cap Fréhel in Brittany (France)

Near Surface Geophysics, Volume 24, Issue 3, Page 262-288, June 2026.
Abstract In June 2023, we measured ten near‐surface seismic profiles to image the critical zone of dolerite (diabase) dykes that cut the sandstone at Cap Fréhel in Brittany (France). Seismic ray tracing and inversion are used to determine the thickness of the regolith layer from first‐arrival P‐wave traveltimes.
M. Zillmer, F. Masson, H. Rutt, A.‐D. Schmitt, F. Chabaux   +4 more
wiley   +1 more source