Deformation of the lowermost mantle from seismic anisotropy

Andy Nowacki (), James Wookey and J-Michael Kendall
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Andy Nowacki: University of Bristol, Wills Memorial Building, Queen’s Road, Bristol, BS8 1RJ, UK
James Wookey: University of Bristol, Wills Memorial Building, Queen’s Road, Bristol, BS8 1RJ, UK
J-Michael Kendall: University of Bristol, Wills Memorial Building, Queen’s Road, Bristol, BS8 1RJ, UK

Nature, 2010, vol. 467, issue 7319, 1091-1094

Abstract: Lower mantle deformation from seismic anisotropy Andy Nowacki and colleagues present constraints on the seismic anisotropy of the Earth's lowermost mantle beneath North and Central America. In three regions they are able to measure the anisotropy with waves travelling in two different horizontal directions, which allows them to demonstrate that the previously assumed vertical transverse isotropy — where wave speed should show no azimuthal variation — is not possible, and that more complicated mechanisms must be involved.

Date: 2010
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DOI: 10.1038/nature09507

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