How valid are dynamic models of subduction and convection when plate motions are prescribed?

Details How valid are dynamic models of subduction and convection when plate motions are prescribed? How valid are dynamic models of subduction and convection when plate motions are prescribed?

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pepi..110..235h&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 110, Issue 3-4, p. 235-246.

Physics

27

Scientific paper

A detailed comparison between fully dynamic and kinematic plate formulations has been made in models of mantle convection. Plate velocity is computed self-consistently from fully dynamic plate models with temperature- and stress-dependent viscosity and preexisting mobile faults. In fully dynamic models, the flow is driven solely by internal buoyancy, while in kinematic models the flow is driven by a combination of the prescribed surface velocity and internal buoyancy. Only a temperature-dependent viscosity, close to the effective viscosity determined from the fully dynamic models, is used in the kinematic models. The two types of models give very similar temperature structures and slab evolutionary histories when the effective viscosity and surface velocity are nearly identical. In kinematic plate models, the additional work introduced by the prescribed velocity boundary condition is apparently dissipated within the lithosphere and has little influence on the convection under the lithosphere. In models with periodic lateral boundary conditions, slabs sink into the lower mantle at an oblique angle and this contrasts with the vertical sinking which occurs with reflecting boundary conditions. Models show that we can simulate fully dynamic models with kinematic models under either periodic boundary conditions or reflecting boundary conditions.

Affiliated with

Also associated with

No associations

Rating

How valid are dynamic models of subduction and convection when plate motions are prescribed? 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 How valid are dynamic models of subduction and convection when plate motions are prescribed?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and How valid are dynamic models of subduction and convection when plate motions are prescribed? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-949100