Seismic properties of the supra-subduction mantle: Constraints from peridotite xenoliths from the Avacha volcano, southern Kamchatka
International audience 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...
Published in: | Geophysical Research Letters |
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ftccsdartic:oai:HAL:hal-00512636v1 2023-05-15T16:58:46+02:00 Seismic properties of the supra-subduction mantle: Constraints from peridotite xenoliths from the Avacha volcano, southern Kamchatka Soustelle, Vincent TOMMASI, Andrea 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) 2010 https://hal.archives-ouvertes.fr/hal-00512636 https://hal.archives-ouvertes.fr/hal-00512636/document https://hal.archives-ouvertes.fr/hal-00512636/file/2010GL043450.pdf https://doi.org/10.1029/2010GL043450 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2010GL043450 hal-00512636 https://hal.archives-ouvertes.fr/hal-00512636 https://hal.archives-ouvertes.fr/hal-00512636/document https://hal.archives-ouvertes.fr/hal-00512636/file/2010GL043450.pdf doi:10.1029/2010GL043450 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-00512636 Geophysical Research Letters, American Geophysical Union, 2010, 37, pp.L13307. ⟨10.1029/2010GL043450⟩ seismic properties xenolith subduction [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2010 ftccsdartic https://doi.org/10.1029/2010GL043450 2021-10-23T23:45:23Z International audience 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. Article in Journal/Newspaper Kamchatka Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Avacha ENVELOPE(158.503,158.503,53.040,53.040) Geophysical Research Letters 37 13 n/a n/a |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
seismic properties xenolith subduction [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
seismic properties xenolith subduction [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDE.MCG]Environmental Sciences/Global Changes Soustelle, Vincent TOMMASI, Andrea Seismic properties of the supra-subduction mantle: Constraints from peridotite xenoliths from the Avacha volcano, southern Kamchatka |
topic_facet |
seismic properties xenolith subduction [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience 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. |
author2 |
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) |
format |
Article in Journal/Newspaper |
author |
Soustelle, Vincent TOMMASI, Andrea |
author_facet |
Soustelle, Vincent TOMMASI, Andrea |
author_sort |
Soustelle, Vincent |
title |
Seismic properties of the supra-subduction mantle: Constraints from peridotite xenoliths from the Avacha volcano, southern Kamchatka |
title_short |
Seismic properties of the supra-subduction mantle: Constraints from peridotite xenoliths from the Avacha volcano, southern Kamchatka |
title_full |
Seismic properties of the supra-subduction mantle: Constraints from peridotite xenoliths from the Avacha volcano, southern Kamchatka |
title_fullStr |
Seismic properties of the supra-subduction mantle: Constraints from peridotite xenoliths from the Avacha volcano, southern Kamchatka |
title_full_unstemmed |
Seismic properties of the supra-subduction mantle: Constraints from peridotite xenoliths from the Avacha volcano, southern Kamchatka |
title_sort |
seismic properties of the supra-subduction mantle: constraints from peridotite xenoliths from the avacha volcano, southern kamchatka |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.archives-ouvertes.fr/hal-00512636 https://hal.archives-ouvertes.fr/hal-00512636/document https://hal.archives-ouvertes.fr/hal-00512636/file/2010GL043450.pdf https://doi.org/10.1029/2010GL043450 |
long_lat |
ENVELOPE(158.503,158.503,53.040,53.040) |
geographic |
Avacha |
geographic_facet |
Avacha |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-00512636 Geophysical Research Letters, American Geophysical Union, 2010, 37, pp.L13307. ⟨10.1029/2010GL043450⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2010GL043450 hal-00512636 https://hal.archives-ouvertes.fr/hal-00512636 https://hal.archives-ouvertes.fr/hal-00512636/document https://hal.archives-ouvertes.fr/hal-00512636/file/2010GL043450.pdf doi:10.1029/2010GL043450 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2010GL043450 |
container_title |
Geophysical Research Letters |
container_volume |
37 |
container_issue |
13 |
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n/a |
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n/a |
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1766050861764575232 |