Results 61 to 70 of about 322 (183)

Two Cycles of Devonian–Triassic Extension and Compression in the Altai Accretionary Wedge: Insights From Tsogt Core Complex

Tectonics, Volume 44, Issue 12, December 2025.
Abstract The Altai Accretionary Wedge in the Mongolian Altai records a polyphase geodynamic evolution involving two extensional–compressional tectonic cycles, constrained by petrostructural analysis and zircon, monazite U–Pb, and Ar–Ar geochronology. The studied section includes a southwestern high‐grade and a northeastern low‐grade domain, previously ...
O. Lexa, P. Jeřábek, K. Schulmann, M. Racek, Y. Jiang, A. R. C. Kylander‐Clark, J. Míková, R. Spikings   +7 more
wiley   +1 more source

3D Petro‐Structural Evolution of the High Pressure‐Low Temperature Phyllite‐Quartzite Nappe Pile in Southern Peloponnese, Greece

Tectonics, Volume 44, Issue 12, December 2025.
Abstract Tectonic underplating of high‐pressure/low‐temperature (HP‐LT) tectonic slices is a key mechanism in crustal growth at convergent margins. Yet, the processes controlling the geometry, depth and sequence of underplating events remain poorly constrained.
Maïlys Bouhot, Armel Menant, Clément Ganino, Samuel Angiboust, Onno Oncken, Laurent Jolivet, Damien Deldicque, Nikolaos Skarpelis, François Orange   +8 more
wiley   +1 more source

The Subduction-Related Metavolcanic Rocks of Maroua, Northern Cameroon: New Insights into a Neoproterozoic Continental Arc Along the Northern Margin of the Central African Fold Belt

Geosciences
The metavolcanic rocks around Maroua in the Far North Region of Cameroon are located at the northern margin of the Central African Fold Belt (CAFB) and have not been studied to date.
Pierre Christel Biakan à Nyotok, Merlin Gountié Dedzo, Diddi Hamadjoda Djamilatou, Nils Lenhardt, Moussa Ngarena Klamadji, Periclex Martial Fosso Tchunte, Pierre Kamgang   +6 more
doaj   +1 more source

Textural Implications in Assessment of Physico-Mechanical behaviour of Metavolcanic Rocks from Dir Upper, north western Pakistan

International Journal of Economic and Environment Geology, 2020
The Dir-Utror meta-volcanics from the south western portion of the Kohistan arc in northern Pakistan are analyzed in term of their petrography, physico-mechanical properties. Field observations and petrography show the collected
Muhammad Sajid, Muhammad Yaseen, Muhammad Zeeshan Ullah, Ghulam Murtaza
doaj   +1 more source

Nilsen Plateau, Transantarctic Mountains, Antarctica: an update on the Gondwana stratigraphy and structure

New Zealand Journal of Geology and Geophysics, Volume 68, Issue 5, Page 1249-1258, December 2025.
ABSTRACT A revised and updated geological map of the Nilsen Plateau and a new geological map of the nearby Mt. Hassel‐Mt. Bjaaland region are presented. The Gondwana succession, overlying pre‐Devonian basement rocks, consists of Permian glacial beds, post‐glacial shales and siltstones, deltaic sandstones, and coal measures succeeded by Triassic flood ...
David H. Elliot
wiley   +1 more source

New U-Pb zircon data for Maarianvaara granite and Tohmajärvi volcanic complex, eastern Finland: geologic implications [PDF]

Bulletin of the Geological Society of Finland
New U-Pb zircon ages reported for samples from the Maarianvaara granite and Tohmajärvi volcanic complex (TVC) corroborate previous estimates of their magmatic emplacement at ca. 1.85 Ga and 2.11 Ga, respectively. The ca.
Asko Kontinen, Jarmo Kohonen, Perttu Mikkola, Matti Kurhila   +3 more
doaj   +1 more source

Supplemental Material: Gold mobilization during metamorphic devolatilization of Archean and Paleoproterozoic metavolcanic rocks

, 2020
Additional information on whole rock geochemistry.<br>
et al., Clifford Patten
openaire   +2 more sources

Basement Domains Recorded in the Zircon Geochemistry of the Northern Sierra Nevada Batholith

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract The northern Sierra Nevada batholith was emplaced into and across a series of accreted crustal belts that vary considerably in their ages and lithologies. Unlike batholithic segments to the south, the northern Sierra comprises smaller, spatially distinct plutons where geologic relations with the host basement can be observed.
Joella Campbell, M. Robinson Cecil, Jade Star Lackey   +2 more
wiley   +1 more source

Crustal Architecture and Low‐Temperature Geochronology of an Apparent Cycladic Tectonic Window (NE Attica, Greece): Insights Into Imbrication in Subduction Settings

Tectonics, Volume 44, Issue 11, November 2025.
Abstract Understanding the timing and configuration of tectonic nappes in collapsed orogens is integral to reconstructing its geodynamic evolution. Northeastern Attica lies between bivergent Miocene detachment systems and has historically been interpreted as a tectonic window exposing the lowest nappe of the Hellenides, the Basal Unit.
C. Bakowsky, D. A. Schneider, B. Grasemann, R. Dubosq, T. A. Ducharme   +4 more
wiley   +1 more source

Bioerosion and bioturbation of a weathered metavolcanic rock (Cretaceous, Czech Republic)

Acta geológica hispánica, 2002
The locality of Marsovicky Hill (N Bohemia, Czech Republic) yielded an example of a Cretaceous sea-bottom composed of Nametarhyolite. Two types of trace fossils penetrate the substrate, namely Thalassinoides isp. and ?Gastrochaenolites isp. Thalassinoides originated presumably in a firmground, i.e.
MIKULÁS, R., NEMECKOVÁ, M., ADAMOVIC, J.   +2 more
openaire   +2 more sources