Computer Science
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004e%26psl.222..485m&link_type=abstract
Earth and Planetary Science Letters, Volume 222, Issue 2, p. 485-500.
Computer Science
11
Plumes, Mantle Convection, Thermochemical Convection, Lower Mantle
Scientific paper
A general feature of both isochemical and thermochemical studies of mantle convection is that horizontal plume velocities tend to be smaller than typical convective velocities, however, it is not clear which system leads to a greater fixity of mantle plumes. We perform two- and three-dimensional numerical calculations and compare both thermochemical and isochemical cases with similar convective vigor to determine whether presence of a dense component in the mantle can lead to smaller ratios of horizontal plume velocity to surface velocity. We investigate different viscosity and density contrasts between chemical components in the thermochemical calculations, and we perform isochemical calculations with both free-slip and no-slip bottom boundary conditions. We then compare both visually and quantitatively the results of the thermochemical and isochemical calculations to determine which leads to greater plume fixity. We find that horizontal plume velocities for thermochemical calculations are similar to those from isochemical calculations with no-slip bottom boundary conditions. In addition, we find that plumes tend to be more fixed for isochemical cases with free-slip bottom boundary conditions for two-dimensional calculations, however, in three dimensions, we find that plume fixity is similar to that observed in thermochemical calculations.
McNamara Allen K.
Zhong Shijie
No associations
LandOfFree
The influence of thermochemical convection on the fixity of mantle plumes 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 The influence of thermochemical convection on the fixity of mantle plumes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The influence of thermochemical convection on the fixity of mantle plumes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1057684