Uppermantle anisotropy and the oceanic lithosphere

Details Uppermantle anisotropy and the oceanic lithosphere Uppermantle anisotropy and the oceanic lithosphere

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10..841a&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 10, Sept. 1983, p. 841-844.

Physics

34

Earth Mantle, Elastic Anisotropy, Geochronology, Lithosphere, Ocean Bottom, Seismic Waves, Love Waves, Plates (Tectonics), Propagation Velocity, Rayleigh Waves, Thickness

Scientific paper

Published Rayleigh and Love wave phase and group velocity data have been inverted taking into account sphericity, anelastic dispersion, and transverse isotropy. For a PREM-type modular parameterization, the thickness of the high velocity mantle seismic lithosphere (LID) varies in thickness from about 30 km for young ocean to about 50 km for old ocean, much less than previous estimates based on isotropic inversion of similar data. This LID thickness is comparable to the elastic or flexural thickness found from studies of seamount loading and flexure at trenches, suggesting that the thickness of the lithosphere may be controlled by mineralogy, composition, or crystal orientation rather than by temperature alone.

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