Results 71 to 80 of about 270,968 (216)

Imaging the Alpine Collision With Seismic Radial Anisotropy

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract The Alpine region and the adjacent Northern Apennines (NA) and Northern Dinarides record the complex tectonic evolution associated with the collision between the Eurasian and Adriatic plates. We combine Rayleigh and Love surface waves from ambient noise and earthquake data recorded at over 3,300 seismic stations to construct a high‐resolution ...
Henrique Berger Roisenberg, Felix Eckel, Amr El‐Sharkawy, Claudio Rosenberg, Lapo Boschi, Thomas Meier, Fabio Cammarano   +6 more
wiley   +1 more source

Shear-velocity structure of the Tyrrhenian Sea: Tectonics, volcanism and mantle (de)hydration of a back-arc basin [PDF]

, 2014
The Tyrrhenian Sea in the Mediterranean formed as the result of roll-back of the Adriatic and Ionian subducting plates. It is mostly underlain by strongly thinned continental lithosphere, but contains two small oceanic basins in the southern Tyrrhenian ...
van Bergen, Manfred, Paulssen, H., Petrology, Seismology, Greve, Sonja, Paulssen, Hanneke, Goes, Saskia, Goes, S., Greve, S., van Bergen, M., CRYSTAL2PLATE: How does plate tectonics work: from crystal-scale processes to mantle convection with self-consistent plates   +10 more
core   +2 more sources

Solid-state mantle convection coupled with a crystallising basal magma ocean

Comptes Rendus. Géoscience
Fractional crystallisation of a basal magma ocean (BMO) has been proposed to explain the formation of large scale compositional variations in the mantle and the persistence of partially molten patches in the lowermost mantle. We present a complete set of
Labrosse, Stéphane, Morison, Adrien, Tackley, Paul James   +2 more
doaj   +1 more source

Effects of the Compositional Viscosity Ratio on the Long‐Term Evolution of Thermochemical Reservoirs in the Deep Mantle

Geophysical Research Letters, 2019
Numerical experiments of thermochemical mantle convection in 2‐D spherical annulus geometry are performed to investigate the effects of compositional viscosity ratio (ΔηC) on the long‐term evolution of reservoirs of dense, primordial material in the ...
Yang Li, Frédéric Deschamps, Jianfeng Yang, Lin Chen, Liang Zhao, Paul J. Tackley   +5 more
doaj   +1 more source

GIA‐Induced Mantle Circulation and Surface Horizontal Motions in North America: Effects of 3D Laterally Varying Elastic Thickness and Viscosity

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract The horizontal surface motions of the Earth's crust induced by glacial isostatic adjustment (GIA) are highly sensitive to lateral variations in Earth properties. We construct 3D GIA models by incorporating both varying elastic lithospheric thickness and lateral viscosity variations in the asthenosphere in a global, compressible, self ...
Kaixuan Kang, Thorsten W. Becker
wiley   +1 more source

Characterizing the Complexity of Subduction Zone Flow With an Ensemble of Multiscale Global Convection Models

Geochemistry, Geophysics, Geosystems
Subduction zones are fundamental features of Earth's mantle convection and plate tectonics, but mantle flow and pressure around slabs are poorly understood because of the lack of direct observational constraints on subsurface flow.
Samuel L. Goldberg, Adam F. Holt
doaj   +1 more source

Impacts of high viscosity variation and internal heating on mantle convection in different aspect ratio cells

Heliyon
This study examines the Rayleigh-Bénard convection model with free slip boundary conditions appropriate for the Earth's mantle in narrow and elongated cells with aspect ratios of 1:2 and 2:1, respectively.
Tania S. Khaleque, Md. Shafiul A. Khan, Romana Yesmin   +2 more
doaj   +1 more source

Evolving mantle convection from bottom up to top down. [PDF]

Innovation (Camb), 2022
Mitchell RN, Brown M, Gernon TM, Spencer CJ.   +3 more
europepmc   +1 more source

Reconciling Coupled Thermal‐Water Evolution Models of Earth With Observations Through Variable Regassing Efficiency

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Reconciling Earth's thermal evolution with geochemical observations remains a fundamental challenge, as parameterized convection models typically predict high present‐day Urey ratios inconsistent with geochemical estimates. Previous studies propose that if mantle water concentration varies inversely to mantle temperature, it would weaken the ...
Alexander B. Thames, Bradford J. Foley
wiley   +1 more source

Investigating Layered Cratonic Lithosphere in the Fennoscandian Shield

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract Cold, thick, and chemically depleted lithosphere with high seismic velocity and low attenuation characterizes continental cratons. However, discrepancies between xenolith‐based thermal constraints and those inferred from surface‐wave seismic models, together with the widespread observation of mid‐lithosphere discontinuities, challenge the ...
Yiran Huang, Colleen A. Dalton, Karen M. Fischer   +2 more
wiley   +1 more source