The dynamical structures of D″ and deep plumes in a non-Newtonian mantle

Loper D.E. (1984) The dynamical structures of D″ and deep plumes in a non-Newtonian mantle. Physics of the Earth and Planetary Interiors, 34 1-2: 57-67. doi:10.1016/0031-9201(84)90084-0


Author Loper D.E.
Title The dynamical structures of D″ and deep plumes in a non-Newtonian mantle
Journal name Physics of the Earth and Planetary Interiors   Check publisher's open access policy
ISSN 0031-9201
Publication date 1984
Sub-type Article (original research)
DOI 10.1016/0031-9201(84)90084-0
Volume 34
Issue 1-2
Start page 57
End page 67
Total pages 11
Subject 1908 Geophysics
1912 Space and Planetary Science
3101 Physics and Astronomy (miscellaneous)
3103 Astronomy and Astrophysics
1900 Earth and Planetary Sciences
2300 Environmental Science
Abstract The dynamical structures of the D″ layer and deep-mantle plumes have been determined for a mantle with a power-law-creep rheology, generalising recent Newtonian analyses. The lateral scales of D″ and plumes are determined by a balance between thermal diffusive-thickening and lateral inflow. The non-Newtonian effect of concentrating shear in regions of high stress acts to thicken the region of rapid flow in both D″ and plumes. This effect is nearly counterbalanced by the increased lateral inflow in the non-Newtonian case, resulting in a modest broadening of the lateral scales of the regions of rapid flow. These changes are structurally unimportant and the essential physics of core cooling, via convective flow in a thin D″ layer and narrow plumes, is remarkably independent of mantle rheology.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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