SEISMIC ANISOTROPY BENEATH THE CONTINENTS: Probing the Depths of Geology
- 1 May 1996
- journal article
- Published by Annual Reviews in Annual Review of Earth and Planetary Sciences
- Vol. 24 (1) , 385-432
- https://doi.org/10.1146/annurev.earth.24.1.385
Abstract
▪ Abstract Seismic anisotropy beneath continents is analyzed from shear-wave splitting recorded at more than 300 continental seismic stations. Anisotropy is found to be a ubiquitous property that is due to mantle deformation from past and present orogenic activity. The observed coherence with crustal deformation implies that the mantle plays a major, if not dominant, role in orogenies. No evidence is found for a continental asthenospheric decoupling zone, suggesting that continents are coupled to general mantle circulation.Keywords
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