Whole-mantle convection with tectonic plates preserves long-term global patterns of upper mantle geochemistry [PDF]
Scientific Reports, 2017 The evolution of the planetary interior during plate tectonics is controlled by slow convection within the mantle. Global-scale geochemical differences across the upper mantle are known, but how they are preserved during convection has not been ...
T. L. Barry +7 more
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Sluggish thermochemical basal mantle structures support their long-lived stability [PDF]
Nature CommunicationsLarge low shear-wave velocity provinces (LLSVPs) in the lowermost mantle are the largest geological structures on Earth, but their origin and age remain highly enigmatic.
Zhidong Shi +8 more
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Timescales of chemical equilibrium between the convecting solid mantle and over- and underlying magma oceans [PDF]
Solid Earth, 2021 After accretion and formation, terrestrial planets go through at least one magma ocean episode. As the magma ocean crystallises, it creates the first layer of solid rocky mantle.
D. P. Bolrão +7 more
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Effects of Composite Rheology on Plate‐Like Behavior in Global‐Scale Mantle Convection
Geophysical Research Letters, 2023 Earth's upper mantle rheology controls lithosphere‐asthenosphere coupling and thus surface tectonics. Rock deformation experiments and seismic anisotropy measurements indicate that composite rheology (co‐existing diffusion and dislocation creep) occurs ...
Maëlis Arnould +2 more
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Narrow, Fast, and “Cool” Mantle Plumes Caused by Strain‐Weakening Rheology in Earth's Lower Mantle
Geochemistry, Geophysics, Geosystems, 2022 The rheological properties of Earth's lower mantle are key for mantle dynamics and planetary evolution. The main rock‐forming minerals in the lower mantle are bridgmanite (Br) and smaller amounts of ferropericlase (Fp).
A. J. P. Gülcher +4 more
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Impact of upper mantle convection on lithosphere hyperextension and subsequent horizontally forced subduction initiation [PDF]
Solid Earth, 2020 Many plate tectonic processes, such as subduction initiation, are embedded in long-term (>100 Myr) geodynamic cycles often involving subsequent phases of extension, cooling without plate deformation and convergence. However, the impact of upper mantle
L. G. Candioti +3 more
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Influence of the Ringwoodite-Perovskite transition on mantle convection in spherical geometry as a function of Clapeyron slope and Rayleigh number [PDF]
Solid Earth, 2011 We investigate the influence on mantle convection of the negative Clapeyron slope ringwoodite to perovskite and ferro-periclase mantle phase transition, which is correlated with the seismic discontinuity at 660 km depth.
M. Wolstencroft, J. H. Davies
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Multidisciplinary Constraints on the Thermal‐Chemical Boundary Between Earth's Core and Mantle
Geochemistry, Geophysics, Geosystems, 2022 Heat flux from the core to the mantle provides driving energy for mantle convection thus powering plate tectonics, and contributes a significant fraction of the geothermal heat budget.
Daniel A. Frost +9 more
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Effective buoyancy ratio: a new parameter for characterizing thermo-chemical mixing in the Earth's mantle [PDF]
Solid Earth, 2015 Numerical modeling has been carried out in a 2-D cylindrical shell domain to quantify the evolution of a primordial dense layer around the core–mantle boundary.
A. Galsa +4 more
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Геодинамика и тектонофизика, 2021 A geodynamic model of upper mantle convection related to the Pacific subduction zone is mathematically substantiated and applied to investigate the Cretaceous-Cenozoic evolution of Central East Asia (CEA) and the Arctic. We present a solution for the two-
L. I. Lobkovsky +2 more
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