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Present-day uplift of the western Alps
Collisional mountain belts grow as a consequence of continental plate convergence and eventually disappear under the combined effects of gravitational collapse and erosion. Using a decade of GPS data, we show that the western Alps are currently characterized by zero horizontal velocity boundary cond...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4921835/ https://www.ncbi.nlm.nih.gov/pubmed/27346228 http://dx.doi.org/10.1038/srep28404 |
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author | Nocquet, J.-M. Sue, C. Walpersdorf, A. Tran, T. Lenôtre, N. Vernant, P. Cushing, M. Jouanne, F. Masson, F. Baize, S. Chéry, J. van der Beek, P. A. |
author_facet | Nocquet, J.-M. Sue, C. Walpersdorf, A. Tran, T. Lenôtre, N. Vernant, P. Cushing, M. Jouanne, F. Masson, F. Baize, S. Chéry, J. van der Beek, P. A. |
author_sort | Nocquet, J.-M. |
collection | PubMed |
description | Collisional mountain belts grow as a consequence of continental plate convergence and eventually disappear under the combined effects of gravitational collapse and erosion. Using a decade of GPS data, we show that the western Alps are currently characterized by zero horizontal velocity boundary conditions, offering the opportunity to investigate orogen evolution at the time of cessation of plate convergence. We find no significant horizontal motion within the belt, but GPS and levelling measurements independently show a regional pattern of uplift reaching ~2.5 mm/yr in the northwestern Alps. Unless a low viscosity crustal root under the northwestern Alps locally enhances the vertical response to surface unloading, the summed effects of isostatic responses to erosion and glaciation explain at most 60% of the observed uplift rates. Rock-uplift rates corrected from transient glacial isostatic adjustment contributions likely exceed erosion rates in the northwestern Alps. In the absence of active convergence, the observed surface uplift must result from deep-seated processes. |
format | Online Article Text |
id | pubmed-4921835 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-49218352016-06-28 Present-day uplift of the western Alps Nocquet, J.-M. Sue, C. Walpersdorf, A. Tran, T. Lenôtre, N. Vernant, P. Cushing, M. Jouanne, F. Masson, F. Baize, S. Chéry, J. van der Beek, P. A. Sci Rep Article Collisional mountain belts grow as a consequence of continental plate convergence and eventually disappear under the combined effects of gravitational collapse and erosion. Using a decade of GPS data, we show that the western Alps are currently characterized by zero horizontal velocity boundary conditions, offering the opportunity to investigate orogen evolution at the time of cessation of plate convergence. We find no significant horizontal motion within the belt, but GPS and levelling measurements independently show a regional pattern of uplift reaching ~2.5 mm/yr in the northwestern Alps. Unless a low viscosity crustal root under the northwestern Alps locally enhances the vertical response to surface unloading, the summed effects of isostatic responses to erosion and glaciation explain at most 60% of the observed uplift rates. Rock-uplift rates corrected from transient glacial isostatic adjustment contributions likely exceed erosion rates in the northwestern Alps. In the absence of active convergence, the observed surface uplift must result from deep-seated processes. Nature Publishing Group 2016-06-27 /pmc/articles/PMC4921835/ /pubmed/27346228 http://dx.doi.org/10.1038/srep28404 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Nocquet, J.-M. Sue, C. Walpersdorf, A. Tran, T. Lenôtre, N. Vernant, P. Cushing, M. Jouanne, F. Masson, F. Baize, S. Chéry, J. van der Beek, P. A. Present-day uplift of the western Alps |
title | Present-day uplift of the western Alps |
title_full | Present-day uplift of the western Alps |
title_fullStr | Present-day uplift of the western Alps |
title_full_unstemmed | Present-day uplift of the western Alps |
title_short | Present-day uplift of the western Alps |
title_sort | present-day uplift of the western alps |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4921835/ https://www.ncbi.nlm.nih.gov/pubmed/27346228 http://dx.doi.org/10.1038/srep28404 |
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