Controls of the structure of subducted slabs

Details Controls of the structure of subducted slabs Controls of the structure of subducted slabs

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.335..317g&link_type=abstract

Nature (ISSN 0028-0836), vol. 335, Sept. 22, 1988, p. 317-321. Research supported by Ametek Corp. and NSF.

Computer Science

138

Computerized Simulation, Earth Planetary Structure, Geodynamics, Seismology, Subduction (Geology), Earth Mantle, Plates (Tectonics)

Scientific paper

Numerical simulations of subducting slabs are formulated in which the shape and dip of the slab are determined by the dynamics of the flow, rather than imposed a priori. The dip of slabs is a function of the time since the initiation of subduction. Slabs fold, develop a kink in dip, and thicken on entry into a high-viscosity lower mantle. Comparison of the simulations with seismic observations suggest that the lower mantle is at least 10-30 times more viscous than the upper mantle.

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