asthenosphere


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Words related to asthenosphere

the lower layer of the crust

References in periodicals archive ?
Quartz diorite formed after asthenosphere material uplifting caused by lower crust delamination and is the mixture of basic melt formed by partial melting of lithospheric mantle and acid melt formed by partial re-melting of crustal materials.
Residual Reunion plume material hotter than ambient mantle provided the necessary heat flux within the upper asthenosphere, contributing to enrich heterogeneous melting.
As a result, the observations only gave us a vague image of the oceanic mantle structure, revealing large-scale features such as the presence of a highly conductive layer that possibly corresponds to the asthenosphere or back-arc spreading.
Our analysis supports the prevailing view that most of the heat is generated in the asthenosphere, but we found that volcanic activity is located 30 to 60 degrees East from where we expect it to be," said Christopher Hamilton of the University of Maryland, College Park.
The buoyant asthenosphere then fills the space left above, where it expands and thus lifts the plateau.
The coupling between the motion and the heat equation is given by the temperature dependence of density and viscosity for the lithospheric mantle and the asthenosphere.
Bath (1957) studied the shadow zones, travel times and energies of longitudinal seismic waves in the presence of an asthenosphere low-velocity layer.
Consider a post-glacial rebound model, based on the isostasy concept, namely, that the elevation of earth's surface (over tens of millions of years) seeks a balance between the weight of lithospheric rocks and the buoyancy of the more viscous asthenosphere.
3] is continually being swept out deep within Earth's mantle somewhat below the asthenosphere by this constantly moving barycenter.
Beneath the earth's thin outer skin (called the lithosphere), mantle rocks creep plastically in a layer known as the asthenosphere, where temperatures stay near the rocks' melting point.
The theory of plate tectonics holds that the Earth's geological processes, from earthquakes and volcanoes to mountain-building and continent formation, are the result of the slow movements of a dozen or so gigantic slabs that shift over the asthenosphere, a molten region of the upper mantle.
A joint analysis of heat flow transfer in the sedimentary cover and the underlying lithosphere and asthenosphere is applied to better reconstruct their thermal and maturation histories.
The other is the lower-crustal channel flow model, which proposes the existence of a low-viscosity asthenosphere in the lower crust of the QTP's eastern margin.
The denser lithospheric mantle is replaced by the lighter asthenosphere yielding a mass deficit relative to the observed data with maximum amplitude of [approximately equal to] 4 mGal in the CVP (blue solid line in Fig.
First, the sum of the changes in masses of different sections in a column above any horizontal surface within the asthenosphere is zero.