The depth of mantle convection

Details The depth of mantle convection The depth of mantle convection

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84..147e&link_type=abstract

Journal of Geophysical Research, vol. 84, Jan. 10, 1979, p. 147-155.

Physics

18

Convective Flow, Dynamic Models, Earth Mantle, Earth Movements, Earth Planetary Structure, Depth, Earth Core, Homogeneity, Planetary Evolution, Tectonics, Temperature Distribution, Thermal Boundary Layer, Viscosity, Vortices

Scientific paper

A one-layer model of convection in the mantle is considered. The presence of both an upper and a lower thermal boundary layer is assumed. The temperature at the core-mantle boundary is estimated to be 4000 + or - 500 K. Temperature fields computed for the two boundary layers are combined with the core-mantle boundary temperature estimate and with the adiabat to yield a curve of temperature versus depth representative of the mantle in its regime of convection. A theoretical analysis of mantle convection, based on the work of Turcotte and Oxburgh (1967) and extended by Golitsyn's (1977) scaling procedure, is presented. It is shown possible to reconcile the global averages of heat flow, plate sizes, speeds, mantle viscosity, plus some seismic data with the most general features of whole-mantle convection as predicted by the simple theory.

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