Physics – Geophysics
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.3559b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, April 10, 1985, p. 3559-3568. Research supported by the Ministero del
Physics
Geophysics
14
Earth Crust, Earth Mantle, Geophysics, Polar Wandering (Geology), Secular Variations, Viscoelasticity, Liouville Equations, Rheology, Tensor Analysis, Viscous Flow
Scientific paper
A uniformly valid mathematical formalism is developed to study the secular motions of the rotational axis of a layered viscoelastic earth due to seismic excitation. The changes required for implementing the formulation within the framework of the faulting problem. The rationale of adopting the chosen nrheological model, which contains a low-viscosity zone beneath the lithosphere and is based on linear Maxell constitutive relationship, is discussed. The impact of this low-viscosity channel on thhe two families of relaxation time, governing both isostatic readjustment and rotational processes, is considered. It is found that the polar motions depend sensitively on the viscosity structure of the asthenosphere and not at all on the underlying mantle. A gloal low-velocity zone with short-term asthenospheric viscosities less than about 5 x 10 to the 18th Pa-s and widths greater than 50 km is ruled out.
Boschi Elisa
Sabadini Roberto
Yuen Dave A.
No associations
LandOfFree
Transient polar motions and the nature of the asthenosphere for short time scales does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Transient polar motions and the nature of the asthenosphere for short time scales, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transient polar motions and the nature of the asthenosphere for short time scales will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1289351