Results 111 to 120 of about 19,207 (163)
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Journal of Geophysical Research, 2008
Decorrelation between s‐wave and bulk sound velocities in the lowermost mantle and explicit density models based on seismic tomography give evidence for non‐thermal lateral density variations in the lowermost mantle. Here we implement such variations in a numerical model of mantle flow driven by density anomalies which are derived from seismic ...
Bernhard Steinberger
exaly +4 more sources
Decorrelation between s‐wave and bulk sound velocities in the lowermost mantle and explicit density models based on seismic tomography give evidence for non‐thermal lateral density variations in the lowermost mantle. Here we implement such variations in a numerical model of mantle flow driven by density anomalies which are derived from seismic ...
Bernhard Steinberger
exaly +4 more sources
2021
The Cenozoic tectonic evolution of Northern Europe involves a number of events that are difficult to reconcile with an intra-plate setting, including magmatic events and topographic changes that are located far from plate boundaries. It is entirely plausible to relate these events to sublithospheric processes in a vigorously convecting mantle. However,
Bunge, Hans-Peter +2 more
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The Cenozoic tectonic evolution of Northern Europe involves a number of events that are difficult to reconcile with an intra-plate setting, including magmatic events and topographic changes that are located far from plate boundaries. It is entirely plausible to relate these events to sublithospheric processes in a vigorously convecting mantle. However,
Bunge, Hans-Peter +2 more
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Sublithospheric flows in the mantle
Geotectonics, 2017The estimated rates of upper mantle sublithospheric flows in the Hawaii–Emperor Range and Ethiopia–Arabia–Caucasus systems are reported. In the Hawaii–Emperor Range system, calculation is based on motion of the asthenospheric flow and the plate moved by it over the branch of the Central Pacific plume.
V. G. Trifonov, S. Yu. Sokolov
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Structure of melt flow channels in the mantle
Geotectonics, 2008Structural events during the formation of the mantle peridotite section in the Voikar-Syn’ya massif of the Polar Urals are considered. The structural units of the mantle section were formed during several deformation stages. Dunite bodies in restitic peridotites were formed in the course of deformation that completed the formation of large-scale folds ...
Savelieva, G. +4 more
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Mantle flow, melting, and dehydration of the Iceland mantle plume
Earth and Planetary Science Letters, 1999Abstract Recent studies have shown that the extraction of water from the mantle due to partial melting beneath mid-ocean ridges may increase the viscosity of the residuum by 2–3 orders of magnitude. We examine this rheological effect on mantle flow and melting of a ridge-centered mantle plume using three-dimensional numerical models. Results indicate
Ito, Garrett +3 more
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Science, 2003
Seismic data from Earth's mantle have been interpreted in terms of high-strain deformation and recrystallization of mantle minerals, allowing conclusions about mantle flow to be drawn. In his Perspective, [Bystricky][1] argues that new data reported by [ Holtzman et al ][2].
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Seismic data from Earth's mantle have been interpreted in terms of high-strain deformation and recrystallization of mantle minerals, allowing conclusions about mantle flow to be drawn. In his Perspective, [Bystricky][1] argues that new data reported by [ Holtzman et al ][2].
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Mantle flow and the evolution of the lithosphere
Physics of the Earth and Planetary Interiors, 1993Abstract The evolution of the lithosphere is mainly controlled by time-dependent forces due to (1) plate tectonic processes and (2) sublithospheric mantle flow. Plate tectonic processes like continental collision may provide strong thermal disturbances and, after completion, may trigger secondary convection beneath the lithosphere.
H. Schmeling, Gabriele Marquart
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The Earth's Mantle: Evidence of Non-Newtonian Flow
Science, 1973Recent information from experimentally deformed dunite coupled with a reanalysis of data on the Fennoscandian postglacial rebound suggest that the rheological behavior of the upper mantle is distinctly non-Newtonian, and that the shear strain rate is proportional to the shear stress raised to about the third power.
R L, Post, D T, Griggs
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Visualizing Strain Anisotropy in Mantle Flow Fields
Computer Graphics Forum, 2011AbstractThe evolution of strain and development of material anisotropy in models of the Earth’s mantle flow convey important information about how to interpret the geometric relationship between observation of seismic anisotropy and the actual mantle flow field.
Harald Obermaier +4 more
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Visualization of Flow Behavior in Earth Mantle Convection
IEEE Transactions on Visualization and Computer Graphics, 2012A fundamental characteristic of fluid flow is that it causes mixing: introduce a dye into a flow, and it will disperse. Mixing can be used as a method to visualize and characterize flow. Because mixing is a process that occurs over time, it is a 4D problem that presents a challenge for computation, visualization, and analysis.
Simon Schröder +5 more
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