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<identifier>oai:HAL:hal-01389119v1</identifier>
<datestamp>2018-01-11</datestamp>
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<title lang=en>The Kaapvaal craton seismic anisotropy: Petrophysical analyses of upper mantle kimberlite nodules</title>
<creator>Ben-Ismail, W</creator>
<creator>Barruol, Guilhem</creator>
<creator>Mainprice, D</creator>
<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>ISSN: 0094-8276</source>
<source>EISSN: 1944-8007</source>
<source>Geophysical Research Letters</source>
<publisher>American Geophysical Union</publisher>
<identifier>hal-01389119</identifier>
<identifier>http://hal.univ-reunion.fr/hal-01389119</identifier>
<identifier>http://hal.univ-reunion.fr/hal-01389119/document</identifier>
<identifier>http://hal.univ-reunion.fr/hal-01389119/file/BenIsmail_GRL_kaapvaal_GRL2001.pdf</identifier>
<source>http://hal.univ-reunion.fr/hal-01389119</source>
<source>Geophysical Research Letters, American Geophysical Union, 2001, 28 (13), pp.2497 - 2500. 〈10.1029/2000GL012419〉</source>
<identifier>DOI : 10.1029/2000GL012419</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1029/2000GL012419</relation>
<language>en</language>
<subject>[SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>A dense network of seismic stations has been deployed on the Kaapvaal craton (South Africa) to investigate the upper mantle seismic structures. In order to bring independent petrophysical constraints, we analyze a direct sampling of the cratonic upper mantle and determine the seismic properties of 48 mantle nodules brought up to the Earth's surface by kimberlite eruptions. Seismic properties of these nodules are calculated from the olivine and pyroxene crystal preferred orientations and the single crystal elastic constants. Despite variations in the nodules compositions, microstructures and crystallographic preferred orientations, seismic anisotropy is rather homogeneous throughout the craton. Mean S-wave anisotropy is weak (2.64 %), which is compatible with the small measured SKS wave splitting (mean delay time of 0.62 s).</description>
<date>2001</date>
</dc>
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