Results 231 to 240 of about 27,280 (282)

Novel Mantle flow retrodictions reveal preferential material flow in the sublithospheric European mantle

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 , Ghelichkhan , Siavash , Oeser , Jens   +2 more
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Structure of melt flow channels in the mantle

Geotectonics, 2008
Structural 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., Sobolev, A., Batanova, V., Suslov, P., Brügmann, G.   +4 more
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Mantle flow models with core‐mantle boundary constraints and chemical heterogeneities in the lowermost mantle

Journal of Geophysical Research: Solid Earth, 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 ...
Steinberger, B., Holme, R.
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Mantle flow, melting, and dehydration of the Iceland mantle plume

Earth and Planetary Science Letters, 1999
Abstract 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, Shen, Yang, Hirth, Greg, Wolfe, Cecily J.   +3 more
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Mantle Flow Revisited

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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Mantle flow and the evolution of the lithosphere

Physics of the Earth and Planetary Interiors, 1993
Abstract 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, 1973
Recent 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, 2011
AbstractThe 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, Magali I. Billen, Hans Hagen, Martin Hering-Bertram, Bernd Hamann   +4 more
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Visualization of Flow Behavior in Earth Mantle Convection

IEEE Transactions on Visualization and Computer Graphics, 2012
A 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, John A. Peterson, Harald Obermaier, Louise H. Kellogg, Kenneth I. Joy, Hans Hagen   +5 more
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A Complex Pattern of Mantle Flow in the Lau Backarc

Science, 2001
Shear-wave splitting analysis of local events recorded on land and on the ocean floor in the Tonga arc and Lau backarc indicate a complex pattern of azimuthal anisotropy that cannot be explained by mantle flow coupled to the downgoing plate. These observations suggest that the direction of mantle flow rotates from convergence-parallel in the Fiji ...
G P, Smith, D A, Wiens, K M, Fischer, L M, Dorman, S C, Webb, J A, Hildebrand   +5 more
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