Crustal deformation across the Southern Patagonian Icefield observed by GNSS

Autores
Richter, Andreas Jorg; Ivins, Erik R.; Lange, Heiner; Mendoza, Luciano Pedro Oscar; Schröder, Ludwig; Hormaechea, José Luis; Casassa, Gino; Marderwald, Eric Rodolfo; Fritsche, Mathias; Perdomo, Raúl Aníbal; Horwath, Martin; Dietrich, R.
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Geodetic GNSS observations at 43 sites well distributed over the Southern Patagonian Icefield region yield site velocities with a mean accuracy of 1 mm/a and 6 mm/a for the horizontal and vertical components, respectively. These velocities are analyzed to reveal the magnitudes and patterns of vertical and horizontal present-day crustal deformation as well as their primary driving processes. The observed vertical velocities confirm a rapid uplift, with rates peaking at 41 mm/a, causally related to glacial-isostatic adjustment (GIA). They yield now an unambiguous preference between two competing GIA models. Remaining discrepancies between the preferred model and our observations point toward an effective upper mantle viscosity even lower than 1.6.10¹⁸ and effects of lateral rheological heterogeneities. An analysis of the horizontal strain and strain-rate fields reveals some complex superposition, with compression dominating in the west and extension in the east. This deformation field suggests significant contributions from three processes: GIA, a western interseismic tectonic deformation field related to plate subduction, and an extensional strain-rate field related to active Patagonian slab window tectonics.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
crustal deformation
glacial-isostatic adjustment
GNSS
Patagonia
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/159482
Acceder
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network_name_str SEDICI (UNLP)
spelling Crustal deformation across the Southern Patagonian Icefield observed by GNSSRichter, Andreas JorgIvins, Erik R.Lange, HeinerMendoza, Luciano Pedro OscarSchröder, LudwigHormaechea, José LuisCasassa, GinoMarderwald, Eric RodolfoFritsche, MathiasPerdomo, Raúl AníbalHorwath, MartinDietrich, R.Ciencias Astronómicascrustal deformationglacial-isostatic adjustmentGNSSPatagoniaGeodetic GNSS observations at 43 sites well distributed over the Southern Patagonian Icefield region yield site velocities with a mean accuracy of 1 mm/a and 6 mm/a for the horizontal and vertical components, respectively. These velocities are analyzed to reveal the magnitudes and patterns of vertical and horizontal present-day crustal deformation as well as their primary driving processes. The observed vertical velocities confirm a rapid uplift, with rates peaking at 41 mm/a, causally related to glacial-isostatic adjustment (GIA). They yield now an unambiguous preference between two competing GIA models. Remaining discrepancies between the preferred model and our observations point toward an effective upper mantle viscosity even lower than 1.6.10¹⁸ and effects of lateral rheological heterogeneities. An analysis of the horizontal strain and strain-rate fields reveals some complex superposition, with compression dominating in the west and extension in the east. This deformation field suggests significant contributions from three processes: GIA, a western interseismic tectonic deformation field related to plate subduction, and an extensional strain-rate field related to active Patagonian slab window tectonics.Facultad de Ciencias Astronómicas y Geofísicas2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf206-215http://sedici.unlp.edu.ar/handle/10915/159482enginfo:eu-repo/semantics/altIdentifier/issn/0012-821Xinfo:eu-repo/semantics/altIdentifier/issn/1385-013Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2016.07.042info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:41:41Zoai:sedici.unlp.edu.ar:10915/159482Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:41:41.557SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Crustal deformation across the Southern Patagonian Icefield observed by GNSS
title Crustal deformation across the Southern Patagonian Icefield observed by GNSS
spellingShingle Crustal deformation across the Southern Patagonian Icefield observed by GNSS
Richter, Andreas Jorg
Ciencias Astronómicas
crustal deformation
glacial-isostatic adjustment
GNSS
Patagonia
title_short Crustal deformation across the Southern Patagonian Icefield observed by GNSS
title_full Crustal deformation across the Southern Patagonian Icefield observed by GNSS
title_fullStr Crustal deformation across the Southern Patagonian Icefield observed by GNSS
title_full_unstemmed Crustal deformation across the Southern Patagonian Icefield observed by GNSS
title_sort Crustal deformation across the Southern Patagonian Icefield observed by GNSS
dc.creator.none.fl_str_mv Richter, Andreas Jorg
Ivins, Erik R.
Lange, Heiner
Mendoza, Luciano Pedro Oscar
Schröder, Ludwig
Hormaechea, José Luis
Casassa, Gino
Marderwald, Eric Rodolfo
Fritsche, Mathias
Perdomo, Raúl Aníbal
Horwath, Martin
Dietrich, R.
author Richter, Andreas Jorg
author_facet Richter, Andreas Jorg
Ivins, Erik R.
Lange, Heiner
Mendoza, Luciano Pedro Oscar
Schröder, Ludwig
Hormaechea, José Luis
Casassa, Gino
Marderwald, Eric Rodolfo
Fritsche, Mathias
Perdomo, Raúl Aníbal
Horwath, Martin
Dietrich, R.
author_role author
author2 Ivins, Erik R.
Lange, Heiner
Mendoza, Luciano Pedro Oscar
Schröder, Ludwig
Hormaechea, José Luis
Casassa, Gino
Marderwald, Eric Rodolfo
Fritsche, Mathias
Perdomo, Raúl Aníbal
Horwath, Martin
Dietrich, R.
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
crustal deformation
glacial-isostatic adjustment
GNSS
Patagonia
topic Ciencias Astronómicas
crustal deformation
glacial-isostatic adjustment
GNSS
Patagonia
dc.description.none.fl_txt_mv Geodetic GNSS observations at 43 sites well distributed over the Southern Patagonian Icefield region yield site velocities with a mean accuracy of 1 mm/a and 6 mm/a for the horizontal and vertical components, respectively. These velocities are analyzed to reveal the magnitudes and patterns of vertical and horizontal present-day crustal deformation as well as their primary driving processes. The observed vertical velocities confirm a rapid uplift, with rates peaking at 41 mm/a, causally related to glacial-isostatic adjustment (GIA). They yield now an unambiguous preference between two competing GIA models. Remaining discrepancies between the preferred model and our observations point toward an effective upper mantle viscosity even lower than 1.6.10¹⁸ and effects of lateral rheological heterogeneities. An analysis of the horizontal strain and strain-rate fields reveals some complex superposition, with compression dominating in the west and extension in the east. This deformation field suggests significant contributions from three processes: GIA, a western interseismic tectonic deformation field related to plate subduction, and an extensional strain-rate field related to active Patagonian slab window tectonics.
Facultad de Ciencias Astronómicas y Geofísicas
description Geodetic GNSS observations at 43 sites well distributed over the Southern Patagonian Icefield region yield site velocities with a mean accuracy of 1 mm/a and 6 mm/a for the horizontal and vertical components, respectively. These velocities are analyzed to reveal the magnitudes and patterns of vertical and horizontal present-day crustal deformation as well as their primary driving processes. The observed vertical velocities confirm a rapid uplift, with rates peaking at 41 mm/a, causally related to glacial-isostatic adjustment (GIA). They yield now an unambiguous preference between two competing GIA models. Remaining discrepancies between the preferred model and our observations point toward an effective upper mantle viscosity even lower than 1.6.10¹⁸ and effects of lateral rheological heterogeneities. An analysis of the horizontal strain and strain-rate fields reveals some complex superposition, with compression dominating in the west and extension in the east. This deformation field suggests significant contributions from three processes: GIA, a western interseismic tectonic deformation field related to plate subduction, and an extensional strain-rate field related to active Patagonian slab window tectonics.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/159482
url http://sedici.unlp.edu.ar/handle/10915/159482
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0012-821X
info:eu-repo/semantics/altIdentifier/issn/1385-013X
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2016.07.042
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
206-215
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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