Lagging mantle convection, the geoid and mantle structure

Details Lagging mantle convection, the geoid and mantle structure Lagging mantle convection, the geoid and mantle structure

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984e%26psl..69..187d&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 69, no. 1, July 1984, p. 187-194.

Physics

11

Earth Mantle, Geoids, Geopotential, Gravitational Fields, Plates (Tectonics), Convection, Geophysical Fluids, Rayleigh Number, Subduction (Geology), Wavelengths

Scientific paper

In numerical models of convection incorporating migration of a simulated subduction zone, the main descending flow lags far behind the migrating trench, and a geoid low is associated with the main descending flow. This provides physical plausibility for the suggestion by Chase and Sprowl that present very long-wavelength (degree 2-4) geoid lows are associated with Mesozoic trench locations, and suggests further that the present long-wavelength geoid, deep mantle structure and hotspot distribution may be straightforward consequences of plate evolution since the Upper Paleozoic.

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