Journal
GEOLOGY
Volume 34, Issue 9, Pages 741-744Publisher
GEOLOGICAL SOC AMER, INC
DOI: 10.1130/G22436.1
Keywords
subduction; backarc basins; dynamic topography; Stokes flow
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Dynamic topography provides a measure of stresses within the Earth's interior. Dense slabs induce an upper mantle flow that deflects the surface of the Earth downward above them. By combining a simple theoretical (Stokeslet) model of subduction, gravity modeling, and seismic tomography, I show that a significant fraction (as much as 2000 m) of the topographic variations observed above the Scotia, Mariana, and Hellenic subduction systems appears to be dynamically induced by stresses related to the underlying subduction.
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