Mathematics – Logic
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.2197v&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 18, Dec. 1991, p. 2197-2200. Research supported by NWO, NASA, and U.S. Army.
Mathematics
Logic
20
Earth Mantle, Free Convection, Mathematical Models, Rheology, Viscous Flow, Boussinesq Approximation, Creep Properties, Newtonian Fluids, Nonnewtonian Fluids, Rayleigh Number, Strain Rate, Stream Functions (Fluids)
Scientific paper
The influences of depth-varying rheologies on the structure of mantle convection and the near surface flow fields are studied. Upwelling flows crossing the upper-lower mantle boundary become considerably thinner and faster. Streamlines are concentrated near the surface and other platelike characteristics are enhanced by this type of rheological stratification in which the averaged effective viscosity of the upper mantle is about two orders of magnitude lower than that of the lower mantle. The presence of a lithosphere with a higher nonlinear dependence in the flow law further promotes platelike behavior. Platelike character of the top boundary-layer is encouraged by a decreasing depth-dependent viscosity in the non-Newtonian upper-mantle and by greater convective vigor.
van den Berg Arie P.
van Keken Peter E.
Yuen David A.
No associations
LandOfFree
Effects of depth-variations in creep laws on the formation of plates in mantle dynamics 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 Effects of depth-variations in creep laws on the formation of plates in mantle dynamics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effects of depth-variations in creep laws on the formation of plates in mantle dynamics will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1538496