Mantle structural geology from seismic anisotropy - Université de La Réunion Access content directly
Book Sections Year : 1999

Mantle structural geology from seismic anisotropy


Seismic anisotropy is a ubiquitous feature of the subcontinental mantle. This can be inferred both from direct seismic observations of shear wave splitting from teleseismic shear waves, as well as the petrofabric analyses of mantle nodules from kimberlite pipes. The anisotropy is principally due to the strain-induced lattice preferred orientation (LPO) of olivine. The combined use of these mantle samples, deformation experiments on olivine, and numerical modeling of LPO, provides a critical framework for making inferences about mantle deformation from observed seismic anisotropy. In most cases there is a close correspondence between mantle deformation derived from seismic observations of anisotropy, and crustal deformation, from the Archean to the present. This implies that the mantle plays a major, if not dominant role in continental deformation. No clear evidence is found for a continental asthenospheric decoupling zone, suggesting that continents are probably coupled to general mantle circulation.
Fichier principal
Vignette du fichier
Silver_et_al_Boyd_vol_1999_hal.pdf (905.76 Ko) Télécharger le fichier
Origin Publisher files allowed on an open archive

Dates and versions

hal-01391514 , version 1 (03-11-2016)


  • HAL Id : hal-01391514 , version 1


Paul R Silver, David R Mainprice, Walid Ben Ismaïl, Andrea Tommasi, Guilhem Barruol. Mantle structural geology from seismic anisotropy. The Geochemical Society. Mantle Petrology: Field Observations and high Pressure experimentations: a Tribute to Francis R. (Joe) Boyd, 6, 1999. ⟨hal-01391514⟩
195 View
179 Download


Gmail Mastodon Facebook X LinkedIn More