Results 51 to 60 of about 8,012 (220)

Tl-rich pyrite and Sb-rich melnikovite in Montlouis pyrite veins (central armorican domain, Janze, Ille-et-Vilaine; France)

Comptes Rendus. Géoscience, 2022
Lower Ordovician sandstones of the “Grès Armoricain” formation in the Montlouis quarry near Janzé (Ille-et-Vilaine, France) display rare Fe-sulfide veins filled with a low-$T$ $({
Lorand, Jean-Pierre, Pont, Sylvain
doaj   +1 more source

Garnet–Clinopyroxene Double‐Layered Coronae in a Metagabbronorite From the High‐Grade Metamorphic Gföhl Unit, Moldanubian Zone

Journal of Metamorphic Geology, Volume 44, Issue 4, Page 311-336, May 2026.
ABSTRACT This study investigates garnet–clinopyroxene double‐layered coronae in a metagabbronorite from the high‐grade metamorphic Gföhl Unit (Bohemian Massif). The coronae formed at the interfaces between relic magmatic orthopyroxene, still preserved in the cores of the coronae, and the plagioclase‐rich rock matrix.
Rene Asenbaum, Tereza Nemeškalová, Martin Racek, Vojtěch Janoušek, Julian Portenkirchner, Rainer Abart   +5 more
wiley   +1 more source

On the development of kink-bands: A case study in the Westasturian-Leonese Zone (Variscan belt, NW Spain)

BSGF - Earth Sciences Bulletin, 2020
A field analysis of kink bands developed in slates from three areas (Grandas, Boal and Luarca areas) of the Westasturian-Leonese Zone (Iberian Variscan belt) is presented.
Aller Jesús, Bastida Fernando, Bobillo-Ares Nilo C.   +2 more
doaj   +1 more source

Th-U-total Pb timing constraints on the emplacement of the granitoid pluton of Stolpen, Germany [PDF]

, 2014
Monazite from the Stolpen monzogranite (SE Germany) was studied to constrain the Th-U-total Pb age of pluton formation. Monazite grains demonstrate subtle to distinct patchy zoning related to slight compositional variations.
Budzyń, Bartosz, Lisowiec, Katarzyna, Renno, Axel D., Schulz, Bernhard, Słaby, Ewa   +4 more
core   +1 more source

A >300 Myr Long‐Lived Topographic Highland Along the Northern North China Craton Margin Driven by Multistage Continental Convergence

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Topographic highlands commonly develop along convergent plate boundaries through long‐term processes such as subduction and continental collision. However, the pre‐Cenozoic mountain‐building history of deep‐time orogenic systems in northeastern Pangaea remains poorly constrained due to later tectonic overprinting and denudation.
Heng Peng, Licheng Wang, Jianqiang Wang, Yazuo Niu, Yahui Yue, Jingbo Sun, Bitian Wei, Chiyang Liu, Massimiliano Zattin, Lin Ding   +9 more
wiley   +1 more source

Sedimentary provenance of siliciclastic rocks from the Lalla Mouchaa Calcschists Formation (Coastal Block, Western Rehamna): Evidence of denudation of ca. 2 Ga basement in the Moroccan Meseta. [PDF]

, 2018
Paleoproterozoic basement rocks (ca. 2Ga) are scarce along the European and North African Paleozoic mountain chains (Fig.1a). In Morocco, ca. 2.2-2Ga granitic rocks (Gasquet et al., 2008; Kouyaté et al., 2013) have been exclusively reported in the ...
El Attari, A., El Houicha, M., Ennih, N., Ezzouhairi, H., Fekkak, A., Gama, C., Jouhari, A., Pereira, M.F., Silva J.B.   +8 more
core  

Evidence for surface uplift of the Atlas Mountains and the surrounding peripheral plateaux: Combining apatite fission-track results and geomorphic indicators in the Western Moroccan Meseta (coastal Variscan Paleozoic basement) [PDF]

, 2010
This work represents an initial attempt to link the evolution of the topography in relation to the general tectonic framework of western Morocco. For this purpose, in a section of the Western Moroccan Meseta different tools are combined in order to ...
A. Azdimousa, A. Jabaloy, Ait Brahim, Ayarza, Babault, Barbero, Bargach, Baudin, Braun, Braun, British Oceanographic Data Centre, Burov, Chèvromont, D. Gómez-Ortiz, Davison, El Hadi, Fullea, Fullea-Urchulutegui, Ghorbal, Guiraud, Harmand, Hoepffner, Hurford, Hurtrez, J. Estupiñán, J.V. Pérez-Peña, Johansson, Ketcham, Ketcham, L. Asebriy, L. Barbero, Lifton, M. Vázquez, M.J. Rodríguez-Peces, Mahmood, Masek, Michard, Michard, Michard, Missenard, Mrini, O'Callaghan, Ohmori, Price, Pérez-Peña, Pérez-Peña, R. Tejero, Rayner, Reiners, Schumm, Strahler, Tahiri, Tarboton, Tassi, Teixell, Teixell, Teixell, Tejero, Zeyen   +58 more
core   +2 more sources

A Common Mantle Source for the Endogenous CO2 Degassed at the Eifel (Western Germany) and the Ardennes (Eastern Belgium) Regions

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Tectonic CO2 Earth degassing is globally relevant and has probably controlled climate on a geological scale (Brune et al., 2019, https://doi.org/10.1038/s41561‐017‐0003‐6). Endogenous CO2 outgassing from rifting areas remains poorly constrained, with most available data from the East African Rift.
Lisa Ricci, Francesco Frondini, Daniele Morgavi, Stefano Caliro, Andrea Luca Rizzo, Tobias P. Fischer, Giovanni Chiodini   +6 more
wiley   +1 more source

Coesite Discovery in Eclogites Confirms UHP Metamorphism in the Orlica‐Śnieżnik Dome (SW Poland)

Journal of Metamorphic Geology, Volume 44, Issue 3, Page 200-225, April 2026.
ABSTRACT Eclogite lenses are exposed within the orthogneiss‐dominated core of the Orlica‐Śnieżnik Dome in the Sudetes, which forms the northeastern margin of the Bohemian Massif (Variscan Belt of Central Europe). The presence of coesite inclusions in garnet and omphacite confirms that these eclogites underwent ultrahigh‐pressure metamorphism.
Małgorzata Nowak, Lucie Tajčmanová, Marcin Dąbrowski, Iris Buisman, Jacek Szczepański   +4 more
wiley   +1 more source

Late-Variscan multistage hydrothermal processes unveiled by chemical ages coupled with compositional and textural uraninite variations in W-Au deposits in the western Spanish Central System Batholith

Geologica Acta, 2019
The scheelite skarn from Los Santos and the W-Au veins from El Cabaco district, located in the Spanish Central System Batholith (SCSB), are some of the best-known tungsten ore deposits in Spain.
S.M. Timón-Sánchez, F.J. López-Moro, R.L. Romer, D. Rhede, A. Fernández-Fernández, C. Moro-Benito   +5 more
doaj   +3 more sources