Structure of the core-mantle transition zone in the hydrodynamic model of the evolution of the earth
Abstract
A simple model is proposed for the core-mantle transition region in which a large concentration gradient occurs, in which it is assumed that the temperature reaches the melting point of mantle matter and that upon transition through this point the viscosity and sedimentation coefficients experience a sharp change. The equations of motion are written in a first approximation with consideration given to the interface conditions as dictated by the above-mentioned assumptions. Two types of motion are shown to be possible. If the Laplacian of the velocity potential function is positive, there are two opposing streams coming from the core and mantle to the interface, while if the Laplacian of the velocity potential is negative, there are two streams transporting matter from the transition zone into the core and mantle.
- Publication:
-
Akademiia Nauk SSSR Doklady
- Pub Date:
- June 1978
- Bibcode:
- 1978DoSSR.240..813M
- Keywords:
-
- Earth Core;
- Earth Mantle;
- Hydrodynamics;
- Planetary Evolution;
- Approximation;
- Concentration (Composition);
- Equations Of Motion;
- Mass Transfer;
- Structural Properties (Geology);
- Transition Temperature;
- Viscosity;
- Geophysics