Articles | Volume 15, issue 4
https://doi.org/10.5194/se-15-387-2024
© 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-15-387-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
03 Apr 2024
Research article |
| 03 Apr 2024
| 03 Apr 2024
Fast uplift in the southern Patagonian Andes due to long- and short-term deglaciation and the asthenospheric window underneath
Veleda A. P. Muller
CORRESPONDING AUTHOR
Dipartimento di Scienze dell'Ambiente e della Terra (DISAT), Università degli Studi di Milano-Bicocca, Piazza della Scienza 4, Milan, Italy
currently at: Department of Geosciences, University of Arizona, Tucson, USA
Pietro Sternai
Dipartimento di Scienze dell'Ambiente e della Terra (DISAT), Università degli Studi di Milano-Bicocca, Piazza della Scienza 4, Milan, Italy
Christian Sue
Institute des Sciences de la Terre (ISTerre), Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, Université Gustave Eiffel, Grenoble, France
Geology Department, Université de Franche-Comté, Besançon, France
Related authors
No articles found.
Marguerite Mathey, Christian Sue, Colin Pagani, Stéphane Baize, Andrea Walpersdorf, Thomas Bodin, Laurent Husson, Estelle Hannouz, and Bertrand Potin
Solid Earth, 12, 1661–1681, https://doi.org/10.5194/se-12-1661-2021, https://doi.org/10.5194/se-12-1661-2021, 2021
Short summary
Short summary
This work features the highest-resolution seismic stress and strain fields available at the present time for the analysis of the active crustal deformation of the Western Alps. In this paper, we address a large dataset of newly computed focal mechanisms from a statistical standpoint, which allows us to suggest a joint control from far-field forces and from buoyancy forces on the present-day deformation of the Western Alps.
Related subject area
Subject area: The evolving Earth surface | Editorial team: Geodesy, gravity, and geomagnetism | Discipline: Geodynamics
Glacial-isostatic-adjustment strain rate–stress paradox in the Western Alps and impact on active faults and seismicity
Juliette Grosset, Stéphane Mazzotti, and Philippe Vernant
Solid Earth, 14, 1067–1081, https://doi.org/10.5194/se-14-1067-2023, https://doi.org/10.5194/se-14-1067-2023, 2023
Short summary
Short summary
In glaciated regions, induced lithosphere deformation is proposed as a key process contributing to fault activity and seismicity. We study the impact of this effect on fault activity in the Western Alps. We show that the response to the last glaciation explains a major part of the geodetic strain rates but does not drive or promote the observed seismicity. Thus, seismic hazard studies in the Western Alps require detailed modeling of the glacial isostatic adjustment (GIA) transient impact.
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Short summary
Uplift rates up to 40 mm yr−1 are measured by GNSS in the southern Patagonian Icefield, a remainder of the Patagonian Ice Sheet that covered the Andes in the Last Glacial Maximum (LGM) at 26 ka. Using numerical modelling, we estimate an increase of 150 to 200 °C of the asthenospheric temperature due to the slab window under southern Patagonia, and we show that post-glacial rebound, after the long-term LGM and the short-term Little Ice Age (400 a), contributed to the modern uplift rate budget.
Uplift rates up to 40 mm yr−1 are measured by GNSS in the southern Patagonian Icefield, a...
