Results 51 to 60 of about 29,724 (300)
BSGF - Earth Sciences Bulletin, 2020 The P–T evolution of a mafic eclogite sample from the Haut-Allier was studied in order to constrain the dynamic of the Variscan subduction in the eastern French Massif Central.
de Hoÿm de Marien Luc +3 more
doaj +1 more source
Initiation of Plate Tectonics from Post-Magma Ocean Thermo-Chemical Convection [PDF]
, 2014 Leading theories for the presence of plate tectonics on Earth typically appeal to the role of present day conditions in promoting rheological weakening of the lithosphere. However, it is unknown whether the conditions of the early Earth were favorable for plate tectonics, or any form of subduction, and thus how subduction begins is unclear.
arxiv +1 more source
Frontiers in Earth Science, 2021 Evaluating the transfer of stresses from megathrust earthquakes to adjacent segments is fundamental to assess seismic hazard. Here, we use a 3D forward model as well as GPS and seismic data to investigate the transient deformation and Coulomb Failure ...
Carlos Peña +8 more
doaj +1 more source
Seamount Subduction and Earthquakes [PDF]
Oceanography, 2010 Seamounts are ubiquitous features of the seafloor that form part of the fabric of oceanic crust. When a seamount enters a subduction zone, it has a major affect on forearc morphology, the uplift history of the island arc, and the structure of the downgoing slab.
Watts, A, Koppers, A, Robinson, D
openaire +4 more sources
Back to full interseismic plate locking decades after the giant 1960 Chile earthquake
Nature Communications, 2018 Great megathrust earthquakes arise from the sudden release of strain accumulated during centuries of interseismic plate convergence. Here, the authors reconstruct interseismic strain accumulation since the 1960 Chile earthquake, finding a transient ...
Daniel Melnick +8 more
doaj +1 more source
Melting of subducted sediments reconciles geophysical images of subduction zones
Nature Communications, 2021 AbstractSediments play a key role in subduction. They help control the chemistry of arc volcanoes and the location of seismic hazards. Here, we present a new model describing the fate of subducted sediments that explains magnetotelluric models of subduction zones, which commonly show an enigmatic conductive anomaly at the trenchward side of volcanic ...
M. W. Förster, K. Selway
openaire +4 more sources
Frontiers in Marine Science, 2022 Motivated by the recurrent formation of eddies in the eastern upwelling areas, we examine cross-basin connectivity that is promoted by coherent, long-lived and long-propagating mesoscale eddies in the Atlantic Ocean.
Artemis Ioannou +2 more
doaj +1 more source
Thermal modeling of subduction zones with prescribed and evolving 2D and 3D slab geometries [PDF]
arXiv, 2023 The determination of the temperature in and above the slab in subduction zones, using models where the top of the slab is precisely known, is important to test hypotheses regarding the causes of arc volcanism and intermediate-depth seismicity. While 2D and 3D models can predict the thermal structure with high precision for fixed slab geometries, a ...
arxiv
How Aseismic Ridges Modify the Dynamics of Free Subduction: A 3-D Numerical Investigation
Frontiers in Earth Science, 2022 The subduction of positively buoyant features has been implicated in the development of flat and shallow dipping slabs, the formation of cusps in trench geometry, and the cessation of associated arc magmatism.
Lior Suchoy +3 more
doaj +1 more source
Lacustrine and fan‐delta sediments in syn‐rift lake basins
The Depositional Record, EarlyView.A consistent model for the sequence framework and depositional pattern of asymmetric half‐grabens in syn‐rift lake basins bounded by active faults has been established, complementing existing models for marine rift successions. Syn‐rift lake basins are characterised by relatively small dimensions, steep slopes, poorly developed shoreline strata ...
Qianyou Wang +6 more
wiley +1 more source