Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography
International audience The Klyuchevskoy Volcanic Group is a cluster of the world's most active subduction volcanoes, situated on the Kamchatka Peninsula, Russia. The volcanoes lie in an unusual off‐arc position within the Central Kamchatka Depression (CKD), a large sedimentary basin whose origi...
Published in: | Journal of Geophysical Research: Solid Earth |
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ftunigrenoble:oai:HAL:hal-02878519v1 2024-05-19T07:43:17+00:00 Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography Green, Robert, G. Christoph, Sens-Schönfelder Shapiro, Nikolai, M Koulakov, Ivan Tilmann, Frederik Dreiling, Jennifer Luehr, Birger Jakovlev, Andrey Abkadyrov, Ilyas Droznin, Dmitry, V. Gordeev, Evgeny, I. German Research Centre for Geosciences - Helmholtz-Centre Potsdam (GFZ) Institut des Sciences de la Terre (ISTerre) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA) Trofimuk Institute of Petroleum Geology and Geophysics of the Siberian Branch of the RAS (IPGG SB RAS) Siberian Branch of the Russian Academy of Sciences (SB RAS) Institute of Volcanology and Seismology of the RAS Far Eastern Branch of the Russian Academy of Sciences (FEB RAS) Kamchatka Branch of the Geophysical Service Russian Academy of Sciences Moscow (RAS) 2020 https://hal.science/hal-02878519 https://hal.science/hal-02878519/document https://hal.science/hal-02878519/file/Green_et_al-2020-Journal_of_Geophysical_Research__Solid_Earth.pdf https://doi.org/10.1029/2019JB018900 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2019JB018900 hal-02878519 https://hal.science/hal-02878519 https://hal.science/hal-02878519/document https://hal.science/hal-02878519/file/Green_et_al-2020-Journal_of_Geophysical_Research__Solid_Earth.pdf doi:10.1029/2019JB018900 info:eu-repo/semantics/OpenAccess ISSN: 2169-9313 EISSN: 2169-9356 Journal of Geophysical Research : Solid Earth https://hal.science/hal-02878519 Journal of Geophysical Research : Solid Earth, 2020, 125 (3), pp.e2019JB018900. ⟨10.1029/2019JB018900⟩ [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology info:eu-repo/semantics/article Journal articles 2020 ftunigrenoble https://doi.org/10.1029/2019JB018900 2024-05-02T00:32:50Z International audience The Klyuchevskoy Volcanic Group is a cluster of the world's most active subduction volcanoes, situated on the Kamchatka Peninsula, Russia. The volcanoes lie in an unusual off‐arc position within the Central Kamchatka Depression (CKD), a large sedimentary basin whose origin is not fully understood. Many gaps also remain in the knowledge of the crustal magmatic plumbing system of these volcanoes. We conducted an ambient noise surface wave tomography, to image the 3‐D shear wave velocity structure of the Klyuchevskoy Volcanic Group and CKD within the surrounding region. Vertical component cross correlations of the continuous seismic noise are used to measure interstation Rayleigh wave group and phase traveltimes. We perform a two‐step surface wave tomography to model the 3‐D Vsv velocity structure. For each inversion stage we use a transdimensional Bayesian Monte Carlo approach, with coupled uncertainty propagation. This ensures that our model provides a reliable 3‐D velocity image of the upper 15 km of the crust, as well as a robust assessment of the uncertainty in the observed structure. Beneath the active volcanoes, we image small slow velocity anomalies at depths of 2–5 km but find no evidence for magma storage regions deeper than 5 km—noting the 15 km depth limit of the model. We also map two clearly defined sedimentary layers within the CKD, revealing an extensive 8 km deep sedimentary accumulation. This volume of sediments is consistent with the possibility that the CKD was formed as an Eocene‐Pliocene fore‐arc regime, rather than by recent (<2 Ma) back‐arc extension. Article in Journal/Newspaper Kamchatka Kamchatka Peninsula Université Grenoble Alpes: HAL Journal of Geophysical Research: Solid Earth 125 3 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology |
spellingShingle |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology Green, Robert, G. Christoph, Sens-Schönfelder Shapiro, Nikolai, M Koulakov, Ivan Tilmann, Frederik Dreiling, Jennifer Luehr, Birger Jakovlev, Andrey Abkadyrov, Ilyas Droznin, Dmitry, V. Gordeev, Evgeny, I. Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography |
topic_facet |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology |
description |
International audience The Klyuchevskoy Volcanic Group is a cluster of the world's most active subduction volcanoes, situated on the Kamchatka Peninsula, Russia. The volcanoes lie in an unusual off‐arc position within the Central Kamchatka Depression (CKD), a large sedimentary basin whose origin is not fully understood. Many gaps also remain in the knowledge of the crustal magmatic plumbing system of these volcanoes. We conducted an ambient noise surface wave tomography, to image the 3‐D shear wave velocity structure of the Klyuchevskoy Volcanic Group and CKD within the surrounding region. Vertical component cross correlations of the continuous seismic noise are used to measure interstation Rayleigh wave group and phase traveltimes. We perform a two‐step surface wave tomography to model the 3‐D Vsv velocity structure. For each inversion stage we use a transdimensional Bayesian Monte Carlo approach, with coupled uncertainty propagation. This ensures that our model provides a reliable 3‐D velocity image of the upper 15 km of the crust, as well as a robust assessment of the uncertainty in the observed structure. Beneath the active volcanoes, we image small slow velocity anomalies at depths of 2–5 km but find no evidence for magma storage regions deeper than 5 km—noting the 15 km depth limit of the model. We also map two clearly defined sedimentary layers within the CKD, revealing an extensive 8 km deep sedimentary accumulation. This volume of sediments is consistent with the possibility that the CKD was formed as an Eocene‐Pliocene fore‐arc regime, rather than by recent (<2 Ma) back‐arc extension. |
author2 |
German Research Centre for Geosciences - Helmholtz-Centre Potsdam (GFZ) Institut des Sciences de la Terre (ISTerre) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA) Trofimuk Institute of Petroleum Geology and Geophysics of the Siberian Branch of the RAS (IPGG SB RAS) Siberian Branch of the Russian Academy of Sciences (SB RAS) Institute of Volcanology and Seismology of the RAS Far Eastern Branch of the Russian Academy of Sciences (FEB RAS) Kamchatka Branch of the Geophysical Service Russian Academy of Sciences Moscow (RAS) |
format |
Article in Journal/Newspaper |
author |
Green, Robert, G. Christoph, Sens-Schönfelder Shapiro, Nikolai, M Koulakov, Ivan Tilmann, Frederik Dreiling, Jennifer Luehr, Birger Jakovlev, Andrey Abkadyrov, Ilyas Droznin, Dmitry, V. Gordeev, Evgeny, I. |
author_facet |
Green, Robert, G. Christoph, Sens-Schönfelder Shapiro, Nikolai, M Koulakov, Ivan Tilmann, Frederik Dreiling, Jennifer Luehr, Birger Jakovlev, Andrey Abkadyrov, Ilyas Droznin, Dmitry, V. Gordeev, Evgeny, I. |
author_sort |
Green, Robert, G. |
title |
Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography |
title_short |
Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography |
title_full |
Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography |
title_fullStr |
Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography |
title_full_unstemmed |
Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography |
title_sort |
magmatic and sedimentary structure beneath the klyuchevskoy volcanic group, kamchatka, from ambient noise tomography |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02878519 https://hal.science/hal-02878519/document https://hal.science/hal-02878519/file/Green_et_al-2020-Journal_of_Geophysical_Research__Solid_Earth.pdf https://doi.org/10.1029/2019JB018900 |
genre |
Kamchatka Kamchatka Peninsula |
genre_facet |
Kamchatka Kamchatka Peninsula |
op_source |
ISSN: 2169-9313 EISSN: 2169-9356 Journal of Geophysical Research : Solid Earth https://hal.science/hal-02878519 Journal of Geophysical Research : Solid Earth, 2020, 125 (3), pp.e2019JB018900. ⟨10.1029/2019JB018900⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2019JB018900 hal-02878519 https://hal.science/hal-02878519 https://hal.science/hal-02878519/document https://hal.science/hal-02878519/file/Green_et_al-2020-Journal_of_Geophysical_Research__Solid_Earth.pdf doi:10.1029/2019JB018900 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2019JB018900 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
125 |
container_issue |
3 |
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1799483011384737792 |