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Age-independent seismic anisotropy under oceanic plates explained by strain history in the asthenosphere

Hedjazian, Navid; Garel, Fanny; Davies, Rhodri; Kaminski, Edouard

Description

The depth of the oceanic lithosphere–asthenosphere boundary (LAB), as inferred from shear wave velocities, increases with lithospheric age, in agreement with models of cooling oceanic lithosphere. On the other hand, the distribution of radial anisotropy under oceanic plates is almost age-independent. In particular, radial anisotropy shows a maximum positive gradient at a depth of ∼70 km, which, if used as a proxy, indicates an age-independent LAB depth. These contrasting observations have...[Show more]

CollectionsANU Research Publications
Date published: 2017
Type: Journal article
URI: http://hdl.handle.net/1885/217831
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2016.12.004

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