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Effects of lateral viscosity variations on postglacial rebound: an analytical approach

Kaufmann, G; Wolf, D

Description

So far, interpretations of postglacial rebound have usually been based on the assumption of laterally homogeneous earth models. However, in view of the increasing evidence of the 3-D structure of the Earth's mantle, several studies on the effects of lateral variations of the viscosity on postglacial rebound have been completed during the last decade. In the present study, we consider load-induced viscoelastic and viscous perturbations of incompressible and vertically homogeneous flat earth...[Show more]

dc.contributor.authorKaufmann, G
dc.contributor.authorWolf, D
dc.date.accessioned2015-12-13T23:35:23Z
dc.identifier.issn0956-540X
dc.identifier.urihttp://hdl.handle.net/1885/93889
dc.description.abstractSo far, interpretations of postglacial rebound have usually been based on the assumption of laterally homogeneous earth models. However, in view of the increasing evidence of the 3-D structure of the Earth's mantle, several studies on the effects of lateral variations of the viscosity on postglacial rebound have been completed during the last decade. In the present study, we consider load-induced viscoelastic and viscous perturbations of incompressible and vertically homogeneous flat earth models with lateral variations of the shear modulus and viscosity. The solution is obtained using a perturbation method and given in analytical form. Our results show that sinusoidal variations of the parameters of less than one order of magnitude can modify the vertical surface displacement associated with a model of the Fennoscandian ice sheet by several tens of metres. The modifications increase approximately in proportion to the amplitude of the lateral variations. The overall increase of the modifications with increasing wavelength is complicated in detail and also results in changes of the spatial and temporal distributions of the vertical surface displacement.
dc.publisherBlackwell Publishing Ltd
dc.sourceGeophysical Journal International
dc.subjectKeywords: crustal deformation; glacial rebound; heterogeneity; viscosity Glacial rebound; Lateral heterogeneity; Viscoelasticity
dc.titleEffects of lateral viscosity variations on postglacial rebound: an analytical approach
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume137
dc.date.issued1999
local.identifier.absfor040312 - Structural Geology
local.identifier.ariespublicationMigratedxPub25319
local.type.statusPublished Version
local.contributor.affiliationKaufmann, G, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationWolf, D, GeoForschungsZentrum
local.description.embargo2037-12-31
local.bibliographicCitation.startpage489?500
local.identifier.doi10.1046/j.1365-246X.1999.00804.x
dc.date.updated2015-12-12T09:39:45Z
local.identifier.scopusID2-s2.0-0033054883
CollectionsANU Research Publications

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