Effects on post-glacial rebound from the hard rheology in the transition zone

Details Effects on post-glacial rebound from the hard rheology in the transition zone Effects on post-glacial rebound from the hard rheology in the transition zone

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992geoji.109..683s&link_type=abstract

Geophysical Journal International (ISSN 0956-540X), vol. 109, no. 3, June 1992, p. 683-700. Research supported by EEC and NASA.

Physics

68

Earth Mantle, Glaciology, Isostasy, Rheology, Earth Rotation, Gravity Anomalies, Mathematical Models, Polar Wandering (Geology), Stress Distribution, Viscoelasticity, Viscosity

Scientific paper

The effect of an increase of viscosity in the earth-mantle's transition zone between 420 and 670 km on the geophysical signatures induced by postglacial rebound was analyzed using a self-gravitating model consisting of an elastic lithosphere, a three-layer viscoelastic mantle, and an inviscid core. Results show that the horizontal displacements and velocities as well as the stress pattern are extremely sensitive to the viscosity increase and to the chemical stratification of the transition zone. The findings indicate that geodetic data on intraplate deformation can be used to put constraints on the viscosity increase in the transition zone and on the amount of chemical stratification in the mantle.

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