On the choice of boundary conditions in continuum models of continental deformation

Details On the choice of boundary conditions in continuum models of continental deformation On the choice of boundary conditions in continuum models of continental deformation

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.2413w&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, Dec. 1990, p. 2413-2416.

Physics

13

Continental Drift, Lithosphere, Newtonian Fluids, Plates (Tectonics), Boundary Conditions, Buoyancy

Scientific paper

Recent studies of continental deformation have treated the lithosphere as a viscous medium and investigated the time evolution of the deformation caused by tectonic and buoyancy forces. This paper examines the differences between (1) continuum models that keep velocity boundary conditions constant with time and (2) models that keep stress boundary conditions constant with time. These differences are demonstrated by using a simple example of a continental lithosphere that is subjected to horizontal compression. The results show that in (2) the indentation velocity decreases with time, while in (1) the indentation velocity remains constant with time.

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