Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central Argentina

Autores
Rimando, Jeremy; Schoenbohm, Lindsay; Ortiz, Gustavo Federico; Alvarado, Patricia Monica; Venerdini, Agostina Lia; Owen, Lewis; Seagren, Erin; Marques Figueiredo, Paula; Hammer, Sarah
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Several major (up to MW 7.5) earthquakes over the past 320 years have shaken the thick-skinned Sierras Pampeanas region of Argentina, despite exhibiting much lower GPS-shortening rates than across the thin-skinned Precordillera region to its west. Whether geodetic shortening rates indicate an actual long-term shortening gradient, and whether shortening rates translate to higher uplift rates due to steeper faults in the Sierras Pampeanas, remain uncertain due to the limited spatio-temporal coverage and the inherently large error in the vertical component of deformation of GPS measurements. We measure geomorphic offsets and use 10Be terrestrial cosmogenic nuclide surface exposure dating to determine slip rates on the Las Chacras Fault Zone (LCFZ)—an ∼30 km long, NNW-trending, steeply dipping (55–65°E) reverse fault that branches off of the longest, westernmost, thick-skinned Valle Fértil range-front fault in the western Sierras Pampeanas. Average shortening and uplift rates measured on the LCFZ are ∼0.2 and ∼0.3–0.4 mm/yr, respectively. Despite an uplift rate similar to most other faults in the region, the LCFZ shortening rate is lower than faults to its west; this is in agreement with the inferred west-east decrease in shortening rates from GPS data, indicating consistent regional deformation patterns since the Late Pleistocene. The decrease in shortening to the east coincides spatially with the termination of the flat portion of the subducted Nazca plate between 67 and 68°W. From scaling relationships among magnitude, slip rate, and fault length, the LCFZ is capable of generating earthquakes of MW 6.7–7.1.
Fil: Rimando, Jeremy. University of Toronto; Canadá
Fil: Schoenbohm, Lindsay. University of Toronto; Canadá
Fil: Ortiz, Gustavo Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina
Fil: Alvarado, Patricia Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina
Fil: Venerdini, Agostina Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina
Fil: Owen, Lewis. North Carolina State University; Estados Unidos
Fil: Seagren, Erin. University of Toronto; Canadá
Fil: Marques Figueiredo, Paula. North Carolina State University; Estados Unidos
Fil: Hammer, Sarah. University of Cincinnati; Estados Unidos
Materia
ACTIVE FAULTS
COSMOGENIC DATING
INTRAPLATE FAULTS
NEOTECTONICS
SEISMIC HAZARDS
THICK-SKINNED DEFORMATION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/183466
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/183466
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central ArgentinaRimando, JeremySchoenbohm, LindsayOrtiz, Gustavo FedericoAlvarado, Patricia MonicaVenerdini, Agostina LiaOwen, LewisSeagren, ErinMarques Figueiredo, PaulaHammer, SarahACTIVE FAULTSCOSMOGENIC DATINGINTRAPLATE FAULTSNEOTECTONICSSEISMIC HAZARDSTHICK-SKINNED DEFORMATIONhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Several major (up to MW 7.5) earthquakes over the past 320 years have shaken the thick-skinned Sierras Pampeanas region of Argentina, despite exhibiting much lower GPS-shortening rates than across the thin-skinned Precordillera region to its west. Whether geodetic shortening rates indicate an actual long-term shortening gradient, and whether shortening rates translate to higher uplift rates due to steeper faults in the Sierras Pampeanas, remain uncertain due to the limited spatio-temporal coverage and the inherently large error in the vertical component of deformation of GPS measurements. We measure geomorphic offsets and use 10Be terrestrial cosmogenic nuclide surface exposure dating to determine slip rates on the Las Chacras Fault Zone (LCFZ)—an ∼30 km long, NNW-trending, steeply dipping (55–65°E) reverse fault that branches off of the longest, westernmost, thick-skinned Valle Fértil range-front fault in the western Sierras Pampeanas. Average shortening and uplift rates measured on the LCFZ are ∼0.2 and ∼0.3–0.4 mm/yr, respectively. Despite an uplift rate similar to most other faults in the region, the LCFZ shortening rate is lower than faults to its west; this is in agreement with the inferred west-east decrease in shortening rates from GPS data, indicating consistent regional deformation patterns since the Late Pleistocene. The decrease in shortening to the east coincides spatially with the termination of the flat portion of the subducted Nazca plate between 67 and 68°W. From scaling relationships among magnitude, slip rate, and fault length, the LCFZ is capable of generating earthquakes of MW 6.7–7.1.Fil: Rimando, Jeremy. University of Toronto; CanadáFil: Schoenbohm, Lindsay. University of Toronto; CanadáFil: Ortiz, Gustavo Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; ArgentinaFil: Alvarado, Patricia Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; ArgentinaFil: Venerdini, Agostina Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; ArgentinaFil: Owen, Lewis. North Carolina State University; Estados UnidosFil: Seagren, Erin. University of Toronto; CanadáFil: Marques Figueiredo, Paula. North Carolina State University; Estados UnidosFil: Hammer, Sarah. University of Cincinnati; Estados UnidosWiley Blackwell Publishing, Inc2021-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/183466Rimando, Jeremy; Schoenbohm, Lindsay; Ortiz, Gustavo Federico; Alvarado, Patricia Monica; Venerdini, Agostina Lia; et al.; Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central Argentina; Wiley Blackwell Publishing, Inc; Tectonics; 40; 4; 4-2021; 1-480278-74071944-9194CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1029/2020TC006509info:eu-repo/semantics/altIdentifier/doi/10.1029/2020TC006509info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:10:28Zoai:ri.conicet.gov.ar:11336/183466instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:10:28.48CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central Argentina
title Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central Argentina
spellingShingle Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central Argentina
Rimando, Jeremy
ACTIVE FAULTS
COSMOGENIC DATING
INTRAPLATE FAULTS
NEOTECTONICS
SEISMIC HAZARDS
THICK-SKINNED DEFORMATION
title_short Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central Argentina
title_full Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central Argentina
title_fullStr Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central Argentina
title_full_unstemmed Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central Argentina
title_sort Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central Argentina
dc.creator.none.fl_str_mv Rimando, Jeremy
Schoenbohm, Lindsay
Ortiz, Gustavo Federico
Alvarado, Patricia Monica
Venerdini, Agostina Lia
Owen, Lewis
Seagren, Erin
Marques Figueiredo, Paula
Hammer, Sarah
author Rimando, Jeremy
author_facet Rimando, Jeremy
Schoenbohm, Lindsay
Ortiz, Gustavo Federico
Alvarado, Patricia Monica
Venerdini, Agostina Lia
Owen, Lewis
Seagren, Erin
Marques Figueiredo, Paula
Hammer, Sarah
author_role author
author2 Schoenbohm, Lindsay
Ortiz, Gustavo Federico
Alvarado, Patricia Monica
Venerdini, Agostina Lia
Owen, Lewis
Seagren, Erin
Marques Figueiredo, Paula
Hammer, Sarah
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv ACTIVE FAULTS
COSMOGENIC DATING
INTRAPLATE FAULTS
NEOTECTONICS
SEISMIC HAZARDS
THICK-SKINNED DEFORMATION
topic ACTIVE FAULTS
COSMOGENIC DATING
INTRAPLATE FAULTS
NEOTECTONICS
SEISMIC HAZARDS
THICK-SKINNED DEFORMATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Several major (up to MW 7.5) earthquakes over the past 320 years have shaken the thick-skinned Sierras Pampeanas region of Argentina, despite exhibiting much lower GPS-shortening rates than across the thin-skinned Precordillera region to its west. Whether geodetic shortening rates indicate an actual long-term shortening gradient, and whether shortening rates translate to higher uplift rates due to steeper faults in the Sierras Pampeanas, remain uncertain due to the limited spatio-temporal coverage and the inherently large error in the vertical component of deformation of GPS measurements. We measure geomorphic offsets and use 10Be terrestrial cosmogenic nuclide surface exposure dating to determine slip rates on the Las Chacras Fault Zone (LCFZ)—an ∼30 km long, NNW-trending, steeply dipping (55–65°E) reverse fault that branches off of the longest, westernmost, thick-skinned Valle Fértil range-front fault in the western Sierras Pampeanas. Average shortening and uplift rates measured on the LCFZ are ∼0.2 and ∼0.3–0.4 mm/yr, respectively. Despite an uplift rate similar to most other faults in the region, the LCFZ shortening rate is lower than faults to its west; this is in agreement with the inferred west-east decrease in shortening rates from GPS data, indicating consistent regional deformation patterns since the Late Pleistocene. The decrease in shortening to the east coincides spatially with the termination of the flat portion of the subducted Nazca plate between 67 and 68°W. From scaling relationships among magnitude, slip rate, and fault length, the LCFZ is capable of generating earthquakes of MW 6.7–7.1.
Fil: Rimando, Jeremy. University of Toronto; Canadá
Fil: Schoenbohm, Lindsay. University of Toronto; Canadá
Fil: Ortiz, Gustavo Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina
Fil: Alvarado, Patricia Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina
Fil: Venerdini, Agostina Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina
Fil: Owen, Lewis. North Carolina State University; Estados Unidos
Fil: Seagren, Erin. University of Toronto; Canadá
Fil: Marques Figueiredo, Paula. North Carolina State University; Estados Unidos
Fil: Hammer, Sarah. University of Cincinnati; Estados Unidos
description Several major (up to MW 7.5) earthquakes over the past 320 years have shaken the thick-skinned Sierras Pampeanas region of Argentina, despite exhibiting much lower GPS-shortening rates than across the thin-skinned Precordillera region to its west. Whether geodetic shortening rates indicate an actual long-term shortening gradient, and whether shortening rates translate to higher uplift rates due to steeper faults in the Sierras Pampeanas, remain uncertain due to the limited spatio-temporal coverage and the inherently large error in the vertical component of deformation of GPS measurements. We measure geomorphic offsets and use 10Be terrestrial cosmogenic nuclide surface exposure dating to determine slip rates on the Las Chacras Fault Zone (LCFZ)—an ∼30 km long, NNW-trending, steeply dipping (55–65°E) reverse fault that branches off of the longest, westernmost, thick-skinned Valle Fértil range-front fault in the western Sierras Pampeanas. Average shortening and uplift rates measured on the LCFZ are ∼0.2 and ∼0.3–0.4 mm/yr, respectively. Despite an uplift rate similar to most other faults in the region, the LCFZ shortening rate is lower than faults to its west; this is in agreement with the inferred west-east decrease in shortening rates from GPS data, indicating consistent regional deformation patterns since the Late Pleistocene. The decrease in shortening to the east coincides spatially with the termination of the flat portion of the subducted Nazca plate between 67 and 68°W. From scaling relationships among magnitude, slip rate, and fault length, the LCFZ is capable of generating earthquakes of MW 6.7–7.1.
publishDate 2021
dc.date.none.fl_str_mv 2021-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/183466
Rimando, Jeremy; Schoenbohm, Lindsay; Ortiz, Gustavo Federico; Alvarado, Patricia Monica; Venerdini, Agostina Lia; et al.; Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central Argentina; Wiley Blackwell Publishing, Inc; Tectonics; 40; 4; 4-2021; 1-48
0278-7407
1944-9194
CONICET Digital
CONICET
url http://hdl.handle.net/11336/183466
identifier_str_mv Rimando, Jeremy; Schoenbohm, Lindsay; Ortiz, Gustavo Federico; Alvarado, Patricia Monica; Venerdini, Agostina Lia; et al.; Late Quaternary intraplate deformation defined by the Las Chacras Fault Zone, West‐Central Argentina; Wiley Blackwell Publishing, Inc; Tectonics; 40; 4; 4-2021; 1-48
0278-7407
1944-9194
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1029/2020TC006509
info:eu-repo/semantics/altIdentifier/doi/10.1029/2020TC006509
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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