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Dislocation damping and anisotropic seismic wave attenuation in earth's upper mantle

Farla, Robert; Jackson, Ian; Fitz Gerald, John; Faul, Ulrich H; Zimmerman, M


Crystal defects form during tectonic deformation and are reactivated by the shear stress associated with passing seismic waves. Although these defects, known as dislocations, potentially contribute to the attenuation of seismic waves in Earth's upper mantle, evidence for dislocation damping from laboratory studies has been circumstantial. We experimentally determined the shear modulus and associated strain-energy dissipation in pre-deformed synthetic olivine aggregates under high pressures and...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Science
DOI: 10.1126/science.1218318


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