Lower mantle material properties and onvection models of multiscale plumes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F07%3A00004399" target="_blank" >RIV/00216208:11320/07:00004399 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—
Alternative languages
Result language
angličtina
Original language name
Lower mantle material properties and onvection models of multiscale plumes
Original language description
We present the results of numerical mantle convection models demonstrating that dynamical effects induced by variable mantle viscosity, depth-dependent thermal expansivity, radiative thermal conductivity at the base of the mantle, the spinel to perovskite phase change and the perovskite to post-perovskite phase transition in the deep mantle can result in multiscale mantle plumes: stable lower-mantle superplumes are followed by groups of small upper-mantle plumes. Both radiative thermal conductivity at the base of the lower mantle and a strongly decreasing thermal expansivity of perovskite in the lower mantle can help induce partially layered convection with intense shear heating under the transition zone, which creates a low-viscosity zone and allows for the production of secondary mantle plumes emanating from this zone.
Czech name
—
Czech description
—
Classification
Type
O - Miscellaneous
CEP classification
DE - Earth magnetism, geodesy, geography
OECD FORD branch
—
Result continuities
Project
<a href="/en/project/GA205%2F06%2F0580" target="_blank" >GA205/06/0580: Inference of the Earth's lateral viscosity structure from observations of the GRACE gravity mission, GPS and glacial isostatic adjustment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2007
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů