Results 61 to 70 of about 61,955 (243)

Tectonic control on great earthquake periodicity in south-central Chile

Communications Earth & Environment
Multi-millennial records of great megathrust earthquakes have highlighted differences in periodicity and recurrence behavior. Understanding tectonic processes responsible for these differences is relevant for fault mechanics and hazard models.
Diego Aedo, Daniel Melnick, Marco Cisternas, Dominik Brill   +3 more
doaj   +1 more source

Evidence for Miocene subduction beneath the Alboran Sea (Western Mediterranean) from 40Ar/39Ar age dating and the geochemistry of volcanic rocks from holes 977A and 978A [PDF]

, 1999
Volcanic pebbles in gravels from Sites 977 and 978 in the Alboran Sea (western Mediterranean) were dated (using the 40Ar/ 39Ar single-crystal laser technique) and analyzed for their major- and trace-element compositions (determined by X-ray ...
Hoernle, Kaj, Garbe-Schönberg, Dieter, van den Bogaard, Paul, Duggen, Svend, Mocek, Beate   +4 more
core   +1 more source

Influence of magma-poor versus magma-rich passive margins on subduction initiation [PDF]

, 2022
International audienceWe present a new numerical modelling study of subduction initiation at (hyper-extended) magma-poor and magma-rich continental passive margins.
Auzemery, Antoine, Willingshofer, E., Auzemery, A., Porkoláb, K., Duretz, Thibault, Duretz, T., Yamato, Philippe, Yamato, P., Matenco, L.   +8 more
core   +1 more source

Heterogeneous Exhumation Mechanisms in Neoproterozoic Collisional Metamorphism: P–T Constraints From Pelotas and Punta del Este Terranes, Southern Brazil and Uruguay

Geological Journal, EarlyView.
Petrography, thermobarometry, and pseudosection modelling reveal peak metamorphic conditions of 3–7.5 kbar and 520°C–800°C in Tonian‐Cryogenian orthogneisses of the Dom Feliciano Belt. Metamorphic field gradients of 27°C/km–39°C/km and variable exhumation mechanisms support correlation of these units as remnants of a Himalayan‐type Piratini Orogeny ...
Thaiane Niederauer‐Santos, Carla Cristine Porcher, Daniel Triboli Vieira, Edinei Koester, Diego Jaldín, Karina Luengo, Luisa Caon   +6 more
wiley   +1 more source

Miocene to Quaternary Tectonostratigraphic Evolution of the Northern Section of the Burdur‐Fethiye Shear Zone, South‐Western Türkiye

Geological Journal, EarlyView.
New zircon ages reveal that lacustrine sedimentation initiated in the Late Miocene (Messinian), revising earlier Pliocene age assignments. The study results support the interpretation of the northern BFSZ as a broad left‐lateral transtensional shear zone rather than a discrete sinistral fault or simple extensional graben array.
İrem Elitez, Gürsel Sunal, Cenk Yaltırak, İsak Yılmaz   +3 more
wiley   +1 more source

Role of Late Cretaceous volcanic-sedimentary melanges, specifically the Aladağ melange, E Turkey, in the rift-drift-subduction-accretion-emplacement history of the Tethyan Inner Tauride ocean

, 2021
The Aladağ melange is located between Mesozoic Tauride carbonate platform units and the Late Cretaceous Pozantı-Karsantı ophiolite and its metamorphic sole.
Alastair H.F. Robertson (3641818), Paulian Dumitrica (7891103), Osman Parlak (2841215)   +2 more
core   +1 more source

Structure and Propagation of Mesoscale Cyclonic Eddies in the Brazil–Malvinas Confluence

International Journal of Climatology, EarlyView.
Between 1993 and 2022, 1386 cyclonic eddies were identified in the Brazil–Malvinas Confluence, one of the most energetic regions of the South Atlantic. While most eddies dissipated locally, a smaller number of individuals, more energetic, and longer lived propagated predominantly south‐westward and north‐eastward, driven by topographic constraints and ...
Rafaella Oliveira Santos, Ilson Carlos Almeida da Silveira, Fabricio Sanguinetti Cruz de Oliveira   +2 more
wiley   +1 more source

Petrology and tectonic settings of the Sarcheshmeh porphyry copper deposit with emphasis on granodiorite and quartz eye porphyry

Journal of Economic Geology, 2020
Introduction The Sarcheshmeh porphyry copper deposit (PCD) and other porphyry deposits occur in the the most important metallogenic belt in Iran, i.e. the Urumieh-Dokhtar magmatic belt (UDMB).
Mohammad Maanijou, Mohammad Mostaghimi, Mehdi Abdollahi Riseh, Ali Asghar Sepahi   +3 more
doaj   +1 more source

Effect of a weak layer at the lithosphere-asthenosphere boundary on subduction dynamics [PDF]

, 2022
The aim of this thesis is to investigate and identify the first order effects of a weak layer at the lithosphere asthenosphere boundary (LAB) on a subduction zone, as to date, no previous geodynamics studies on this topic exist.
Carluccio, Roberta
core  

A Phase‐Field Model for Quasi‐Dynamic Rupture Nucleation and Propagation of In‐Plane Faults

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Computational modeling of faulting processes is an essential tool for understanding earthquake mechanics but remains challenging due to the structural and material complexities of fault zones. The phase‐field method has recently enabled unified modeling of fault propagation and off‐fault damage within a fracture‐mechanics‐based framework ...
Fan Fei, Md Shumon Mia, Ahmed E. Elbanna, Jinhyun Choo   +3 more
wiley   +1 more source