Articles | Volume 15, issue 7
https://doi.org/10.5194/se-15-827-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-15-827-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
15 Jul 2024
Research article |
| 15 Jul 2024
| 15 Jul 2024
Highlights on mantle deformation beneath the Western Alps with seismic anisotropy using CIFALPS2 data
Silvia Pondrelli
CORRESPONDING AUTHOR
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italy
Simone Salimbeni
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italy
Judith M. Confal
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italy
Marco G. Malusà
Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza 4, 20126 Milan, Italy
Anne Paul
Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, UGE, ISTerre, Grenoble, France
Stephane Guillot
Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, UGE, ISTerre, Grenoble, France
Stefano Solarino
Istituto Nazionale di Geofisica e Vulcanologia, ONT, Genoa, Italy
Elena Eva
Istituto Nazionale di Geofisica e Vulcanologia, ONT, Genoa, Italy
Coralie Aubert
Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, UGE, ISTerre, Grenoble, France
Liang Zhao
State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China
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Related subject area
Subject area: Core and mantle structure and dynamics | Editorial team: Seismics, seismology, paleoseismology, geoelectrics, and electromagnetics | Discipline: Seismology
Imaging structure and geometry of slabs in the greater Alpine area – a P-wave travel-time tomography using AlpArray Seismic Network data
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Permian plume beneath Tarim from receiver functions
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Marcel Paffrath, Wolfgang Friederich, and the AlpArray and AlpArray-SWATH D Working Groups
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Lei Li, Pierre Boué, and Michel Campillo
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Lev Vinnik, Yangfan Deng, Grigoriy Kosarev, Sergey Oreshin, and Larissa Makeyeva
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We used seismology data to estimate the thickness of the MTZ and found it thinned beneath Tarim, which is exactly beneath the Permian basalts. This relation can be reconciled with coherent translation of a tectosphere that extends to a depth of 410 km or more. Combined with observations in the Siberian large igneous province and Greenland, these features may confirm the existence of a deep tectosphere. Alternatively, the shift of Tarim is less than predicted by an order of magnitude.
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Zhao, L., Paul, A., Malusà, M. G., Xu, X., Zheng, T., Solarino, S., Guillot, S. Schwartz, S., Dumont, T., Salimbeni, S., Aubert, C., Pondrelli, S., Wang, Q., and Zhu, R.: Continuity of the Alpine slab unraveled by high-resolution P wave tomography, J. Geophys. Res., 121, 8720–8737, 2016a.
Zhao, L., Paul, A., and Solarino, S.: RESIF: Seismic network YP: CIFALPS temporary experiment (China-Italy-France Alps seismic transect) [Data set], RESIF – Réseau Sismologique et géodésique Français [data set], https://doi.org/10.15778/RESIF.YP2012, 2016b.
Zhao, L., Paul, A., and Solarino, S. RESIF: Seismic network XT: CIFALPS-2 temporary experiment (China-Italy-France Alps seismic transect #2 [Data set], RESIF – Réseau Sismologique et Géodésique Français [data set], https://doi.org/10.15778/RESIF.XT2018, 2018.
Zhao, D., Liu, X., Wang, Z., and Gou, T.: Seismic Anisotropy Tomography and Mantle Dynamics, Surv. Geophys., 44, 947–982, https://doi.org/10.1007/s10712-022-09764-7, 2023.
Short summary
We analyse and interpret seismic anisotropy from CIFALPS2 data that fill the gaps in the Western Alps and support a new hypothesis. Instead of a continuous mantle flow parallel to the belt, here we find a N–S mantle deformation pattern that merges first with a mantle deformed by slab steepening beneath the Central Alps and then merges with an asthenospheric flow sourced beneath the Massif Central. This new sketch supports the extinction of slab retreat beneath the Western Alps.
We analyse and interpret seismic anisotropy from CIFALPS2 data that fill the gaps in the Western...
