Deformation of a weak subducted slab and variation of seismicity with depth

Details Deformation of a weak subducted slab and variation of seismicity with depth Deformation of a weak subducted slab and variation of seismicity with depth

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993natur.361..626t&link_type=abstract

Nature (ISSN 0028-0836), vol. 361, no. 6413, p. 626-628.

Physics

22

Earth Mantle, Lithosphere, Seismology, Subduction (Geology), Deformation, Earth Surface, Geophysical Fluids

Scientific paper

Numerical simulations of slab evolution are used here to show that a weak slab model is consistent with seismic observations. Assuming that earthquakes occur at a rate proportional to deformation rate, the observed variation with depth of seismicity rate and focal mechanisms is reproduced along with the cessation of seismicity at 670 km depth. Provided that sinking material encounters resistance at depth, the pattern of seismicity can be explained by any mechanism for deep earthquakes in which the rate of seismicity is proportional to strain rate in the slab.

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