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<datestamp>2018-01-11</datestamp>
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<title lang=en>Seismic properties of the supra-subduction mantle: Constraints from peridotite xenoliths from the Avacha volcano, southern Kamchatka</title>
<creator>Soustelle, Vincent</creator>
<creator>Tommasi, Andrea</creator>
<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-00512636</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00512636</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00512636</source>
<source>Geophysical Research Letters, American Geophysical Union, 2010, 37, pp.L13307. 〈10.1029/2010GL043450〉</source>
<identifier>DOI : 10.1029/2010GL043450</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1029/2010GL043450</relation>
<language>en</language>
<subject lang=en>seismic properties</subject>
<subject lang=en>xenolith</subject>
<subject lang=en>subduction</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>This work presents seismic properties derived from a detailed microstructural study of supra-subduction mantle xenoliths extracted by the active Avacha volcano in the southern Kamchatka arc. These peridotites underwent low-stress deformation and syn- to late-kinematic reactive percolation of hydrous melts or fluids leading to local orthopyroxene enrichment and dispersion of the olivine CPO in the shallow mantle wedge. All samples show an axial [ 100] olivine CPO implying fast S-wave polarization parallel to the flow direction in the mantle. Orthopyroxene-enrichment by reactive fluids/melts percolation lowers the Vp/Vs ratio, but cannot explain the Vp/Vs ratios <1.7 mapped in the Japan and Andes forearc mantle. These low Vp/Vs ratios may however be explained by considering the intrinsic anisotropy of the peridotites.</description>
<date>2010</date>
</dc>
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