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Using thermo-mechanical models of subduction to constrain effective mantle viscosity

Garel, Fanny; Thoraval, C; Tommasi, Andrea; Demouchy, Sylvie; Davies, D. Rhodri


Mantle convection and plate dynamics transfer and deform solid material on scales of hundreds to thousands of km. However, viscoplastic deformation of rocks arises from motions of defects at subcrystal scale, such as vacancies or dislocations. In this study, results from numerical experiments of dislocation dynamics in olivine for temperatures and stresses relevant for both lithospheric and asthenospheric mantle (800–1700 K and 50–500 MPa; Gouriet et al., 2019) are used to derive three...[Show more]

CollectionsANU Research Publications
Date published: 2020
Type: Journal article
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2020.116243


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