Results 181 to 190 of about 180,659 (212)

Diffusion Creep in Perovskite: Implications for the Rheology of the Lower Mantle

Science, 1992
High-temperature creep experiments on polycrystalline perovskite (CaTiO 3 ), an analog of (Mg,Fe)SiO 3 perovskite of the lower mantle, suggest that (grain size-sensitive) diffusion creep is important in the lower mantle and show that creep rate is enhanced by the transformation from the ...
S, Karato, P, Li
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Laboratory Constraints on the Rheology of the Upper Mantle

Reviews in Mineralogy and Geochemistry, 2002
The dynamics of convection and the mechanical behavior of the lithosphere are controlled by the rheology of upper mantle rocks. For this reason, experimental and theoretical studies on the rheology of olivine aggregates have been fields of active research for at least the last 35 years. In this short-course paper, I briefly review some experimental and
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The Microphysical Approach to Mantle Rheology

1991
The rheology of the mantle can be estimated from geophysical observables related to the Earth’s response to changes in surface load and lateral density differences, and from theoretical and experimental knowledge on creep mechanisms in polycrystalline silicates (microphysical approach).
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Diffusion creep, dislocation creep, and mantle rheology

Physics of the Earth and Planetary Interiors, 1984
Abstract Viscosity-depth profiles in the Earth's mantle are estimated on the basis of microrheological equations for ultrabasic silicates, the preliminary reference Earth model (PREM), and two assumed geotherms (one with, and one without, a lower mantle upper thermal boundary layer).
G. Ranalli, B. Fischer
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Geothermal models and mantle rheology in Australia

Tectonophysics, 1989
Abstract Geothermal models can be constructed for Australia consistent with seismic refraction data. Variations in velocity can be assumed to coincide with variations in thermal conductivity and heat production for discrete blocks representing a complex geological section.
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Mantle rheology from a geodynamical standpoint

La Rivista del Nuovo Cimento, 1982
D. Yuen, R. Sabadini, E. Boschi
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Grain-size distribution and rheology of the upper mantle

Tectonophysics, 1984
Abstract The physical processes that govern the grain size of rocks in the upper mantle are examined. The analysis is based on the experimental data on creep, recrystallization, and grain growth in dunites and on a theoretical model for the thermomechanical structure of the cooling moving lithosphere. The grain size of rocks is shown to be determined
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Glacial Isostasy, Sea-Level and Mantle Rheology

1991
Post-Glacial Rebound.- "Rheology of mantle and lithosphere inferred 1 from post-glacial uplift in Fennoscandia".- "Deep continental roots: the 21 effects of lateral variations of viscosity on post-glacial rebound".- "A model for Devensian and Flandrian glacial rebound and sea-level change in Scotland".- "Radial resolution in the inference of mantle ...
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Influence of Mantle Rheology on Plume Dynamics and Periodicities

Many hotspots worldwide display evidence of fluctuating magmatic activities that may be linked to time-dependent variations in melt production within mantle plumes. These periodicities are observed globally on Earth, ranging from 1 Myr to 20 Myr [Morrow and Mittelstaedt, 2021 ; Sokolov et al., 2025].
Alexandre Koessler, Maëlis Arnould, Jean-Philippe Perrillat, Vincent Famin   +3 more
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Sensitivity of gravity anomalies to mantle rheology at mid-ocean ridge – transform fault systems

Earth and Planetary Science Letters, 2023
Lars Ruepke, Sibiao Liu, Zhikui Guo
exaly