Three-dimensional spherical models of convection in the earth's mantle

Details Three-dimensional spherical models of convection in the earth's mantle Three-dimensional spherical models of convection in the earth's mantle

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989sci...244..950b&link_type=abstract

Science (ISSN 0036-8075), vol. 244, May 26, 1989, p. 950-955.

Physics

111

Convection Currents, Earth Mantle, Three Dimensional Models, Plumes, Rheology, Subduction (Geology)

Scientific paper

Three-dimensional spherical models of mantle convection in the earth reveal that upwelling cylindrical plumes and downwelling planar sheets are the primary features of mantle circulation. Thus subduction zones and descending sheetlike slabs in the mantle are fundamental characteristics of thermal convection in a spherical shell and are not merely the consequences of the rigidity of the slabs, which are cooler than the surrounding mantle. Cylindrical mantle plumes that cause hot spots such as Hawaii are probably the only form of active upwelling and are therefore not just secondary convective currents separate from the large-scale mantle circulation.

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