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<datestamp>2018-01-11</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>Mantle structural geology from seismic anisotropy</title>
<creator>Silver, Paul, </creator>
<creator>Mainprice, David, </creator>
<creator>Ismaïl, Walid, </creator>
<creator>Tommasi, Andréa, </creator>
<creator>Barruol, Guilhem</creator>
<contributor>Department of Terrestrial Magnetism [Carnegie Institution] ; Carnegie Institution for Science [Washington]</contributor>
<contributor>Laboratoire de Tectonophysique (Tectonophysique) ; Université Montpellier 2 - Sciences et Techniques (UM2) - Institut national des sciences de l'Univers (INSU - CNRS) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>Mantle Petrology: Field Observations and high Pressure experimentations: a Tribute to Francis R. (Joe) Boyd</source>
<contributor>The Geochemical Society</contributor>
<identifier>hal-01391514</identifier>
<identifier>http://hal.univ-reunion.fr/hal-01391514</identifier>
<identifier>http://hal.univ-reunion.fr/hal-01391514/document</identifier>
<identifier>http://hal.univ-reunion.fr/hal-01391514/file/Silver_et_al_BoydVolume 1999_hal.pdf</identifier>
<source>http://hal.univ-reunion.fr/hal-01391514</source>
<source>The Geochemical Society. Mantle Petrology: Field Observations and high Pressure experimentations: a Tribute to Francis R. (Joe) Boyd, 6, 1999</source>
<language>en</language>
<subject>[SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]</subject>
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<description lang=en>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.</description>
<date>1999</date>
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