Results 31 to 40 of about 180,659 (212)
Inverse problems in mantle convection : models, algorithms, and applications [PDF]
, 2013 textMantle convection is the principal control on the thermal and geological evolution of the earth, including the motion of the tectonic plates, which in turn influences earthquakes, tsunamis, and volcanic eruptions.
Worthen, Jennifer Anne
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Geophysical Research Letters, 2022 Seismic tomography models indicate highly variable Earth structure beneath Antarctica with anomalously low shallow mantle viscosities below West Antarctica.
M. Yousefi +7 more
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Arrhenius rheology versus Frank‐Kamenetskii rheology—Implications for mantle dynamics [PDF]
Geochemistry, Geophysics, Geosystems, 2013 The viscosity of planetary mantle material is strongly temperature dependent. This dependence is described by an Arrhenius law. But for the realistic viscosity contrast that appears over the depth of the mantle, strong gradients in the upper thermal boundary layer occur. These strong gradients are not realizable in numerical models.
C. Stein, U. Hansen
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Mid-lower mantle scatterers: Detection methods, research progress and prospect
地球与行星物理论评, 2023 Thanks to the rapid development of seismic wave propagation theory, emerging of data analyzing methods, and the increasing coverage of the seismic exploration, our ability to probe deep into the Earth has been increased from the scale of 100 kilometers ...
Juan Li +4 more
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Sea‐level fluctuations due to subduction: The role of mantle rheology [PDF]
Geophysical Research Letters, 1997 By means of a stratified viscoelastic Earth model we study the effect of sinking slabs on the dynamic topography, the non‐hydrostatic geoid and the long‐term sea level variations. Sea level fluctuations due to subduction are found to be sensitive to the nature of the 670 km seismic discontinuity and to the rheological layering of the mantle.
C. PIROMALLO +3 more
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Deep Underground Science and Engineering, EarlyView.This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu +8 more
wiley +1 more source
Is the lower‐mantle rheology Newtonian today?
Geophysical Research Letters, 1996 The issue concerning the dominant creep mechanism in mantle convection has been studied numerically with a rheology incorporating both linear and non‐linear elements. We have employed a rheology suggested by the recently obtained melting temperature of lower‐mantle constituents. For an effective Rayleigh number between 105 and 106 this type of strongly
Arie P. van den Berg, David A. Yuen
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Modification of Mantle Cargo by Turbulent Ascent of Kimberlite
Frontiers in Earth Science, 2019 Kimberlite magmas transport cratonic mantle xenoliths and diamonds to the Earth's surface. However, the mechanisms supporting the successful and efficient ascent of these cargo-laden magmas remains enigmatic due to the absence of historic eruptions ...
Thomas J. Jones +2 more
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Earth, Planets and Space, 2021 The rheology of the upper mantle impacts a variety of geodynamic processes, including postseismic deformation following great earthquakes and post-glacial rebound.
Sagar Masuti, Sylvain Barbot
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Geosciences, 2023 Hyperextended rift systems are characterized by extreme crustal thinning and mantle exhumation associated with extensional detachment faults. These faults cut through thinned continental crust, reaching the underlying mantle and allowing for seawater to ...
Victor Hugo Guimarães Pinto +6 more
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