Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, Argentina

Autores
Penna, Ivanna Marina; Hermanns, Reginald L.; Niedermann, Samuel; Folguera Telichevsky, Andres
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Quaternary tectonic activity in the transition area between the Central and Patagonian Andes is closely associated with an anomalous cluster of rockslides: 19 rockslides with volumes up to 4 × 109 m3 developed in plateau basalts. We divided them into two groups: (A) rockslides related to neotectonic activity and (B) rockslides not related to neotectonic activity. Thirteen rockslides, with a total volume of ~10 km3, which lie on either folds or faults, have been displaced parallel to the structures and perpendicular to the valleyaxis, and they exhibit headscarps several kilometersaway from the valley axis. Most of them are larger than 109 m3, and are generally of rock avalanche type with a high degree of crushing of rocks, although local relief in some cases does not exceed 200 m. Nine rockslides with a total volume of 8.9 km3 are related to folds, while four with a total volume of 1.3 km3 are related to faults. The six rockslides not related to neotectonic activity have a totalvolume of 0.25 km3 (of which the largest one accounts for 0.17 km3), and are rotational slides and block topples with a low degree of rock fragmentation, although local relief is up to 400 m. The 3He and 21Ne surface exposure ages for six of these slides, as well as relative age assessment based on stratigraphic relation with glacial deposits and the drainage development on the rockslide deposit, suggest that the rockslide ages spread rather randomly betweenpre-glacial and mid Holocene, discarding climatic conditions as a common triggering factor. The absence of structures that can represent ideal sliding planes shows that rock fracturing due to neotectonic activity is a major conditioning factor for failures and that the magnitude of landslides is strongly controlled by the type of deformation.
Fil: Penna, Ivanna Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Laboratorio de Tectónica Andina; Argentina
Fil: Hermanns, Reginald L.. Geological Survey of Norway; Noruega
Fil: Niedermann, Samuel. Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum; Alemania
Fil: Folguera Telichevsky, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Laboratorio de Tectónica Andina; Argentina
Materia
Slope Failures
Neotectonics
Patagonia
Argentina
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:11336/68488
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/68488
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, ArgentinaPenna, Ivanna MarinaHermanns, Reginald L.Niedermann, SamuelFolguera Telichevsky, AndresSlope FailuresNeotectonicsPatagoniaArgentinahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Quaternary tectonic activity in the transition area between the Central and Patagonian Andes is closely associated with an anomalous cluster of rockslides: 19 rockslides with volumes up to 4 × 109 m3 developed in plateau basalts. We divided them into two groups: (A) rockslides related to neotectonic activity and (B) rockslides not related to neotectonic activity. Thirteen rockslides, with a total volume of ~10 km3, which lie on either folds or faults, have been displaced parallel to the structures and perpendicular to the valleyaxis, and they exhibit headscarps several kilometersaway from the valley axis. Most of them are larger than 109 m3, and are generally of rock avalanche type with a high degree of crushing of rocks, although local relief in some cases does not exceed 200 m. Nine rockslides with a total volume of 8.9 km3 are related to folds, while four with a total volume of 1.3 km3 are related to faults. The six rockslides not related to neotectonic activity have a totalvolume of 0.25 km3 (of which the largest one accounts for 0.17 km3), and are rotational slides and block topples with a low degree of rock fragmentation, although local relief is up to 400 m. The 3He and 21Ne surface exposure ages for six of these slides, as well as relative age assessment based on stratigraphic relation with glacial deposits and the drainage development on the rockslide deposit, suggest that the rockslide ages spread rather randomly betweenpre-glacial and mid Holocene, discarding climatic conditions as a common triggering factor. The absence of structures that can represent ideal sliding planes shows that rock fracturing due to neotectonic activity is a major conditioning factor for failures and that the magnitude of landslides is strongly controlled by the type of deformation.Fil: Penna, Ivanna Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Laboratorio de Tectónica Andina; ArgentinaFil: Hermanns, Reginald L.. Geological Survey of Norway; NoruegaFil: Niedermann, Samuel. Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum; AlemaniaFil: Folguera Telichevsky, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Laboratorio de Tectónica Andina; ArgentinaGeological Society of America2011-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/68488Penna, Ivanna Marina; Hermanns, Reginald L.; Niedermann, Samuel; Folguera Telichevsky, Andres; Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, Argentina; Geological Society of America; Geological Society of America Bulletin; 123; 9-10; 9-2011; 1880-18950016-76061943-2674CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1130/B30399.1info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/gsa/gsabulletin/article/123/9-10/1880-1895/125710info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:04:00Zoai:ri.conicet.gov.ar:11336/68488instacron: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:34982025-10-22 11:04:00.81CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, Argentina
title Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, Argentina
spellingShingle Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, Argentina
Penna, Ivanna Marina
Slope Failures
Neotectonics
Patagonia
Argentina
title_short Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, Argentina
title_full Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, Argentina
title_fullStr Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, Argentina
title_full_unstemmed Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, Argentina
title_sort Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, Argentina
dc.creator.none.fl_str_mv Penna, Ivanna Marina
Hermanns, Reginald L.
Niedermann, Samuel
Folguera Telichevsky, Andres
author Penna, Ivanna Marina
author_facet Penna, Ivanna Marina
Hermanns, Reginald L.
Niedermann, Samuel
Folguera Telichevsky, Andres
author_role author
author2 Hermanns, Reginald L.
Niedermann, Samuel
Folguera Telichevsky, Andres
author2_role author
author
author
dc.subject.none.fl_str_mv Slope Failures
Neotectonics
Patagonia
Argentina
topic Slope Failures
Neotectonics
Patagonia
Argentina
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Quaternary tectonic activity in the transition area between the Central and Patagonian Andes is closely associated with an anomalous cluster of rockslides: 19 rockslides with volumes up to 4 × 109 m3 developed in plateau basalts. We divided them into two groups: (A) rockslides related to neotectonic activity and (B) rockslides not related to neotectonic activity. Thirteen rockslides, with a total volume of ~10 km3, which lie on either folds or faults, have been displaced parallel to the structures and perpendicular to the valleyaxis, and they exhibit headscarps several kilometersaway from the valley axis. Most of them are larger than 109 m3, and are generally of rock avalanche type with a high degree of crushing of rocks, although local relief in some cases does not exceed 200 m. Nine rockslides with a total volume of 8.9 km3 are related to folds, while four with a total volume of 1.3 km3 are related to faults. The six rockslides not related to neotectonic activity have a totalvolume of 0.25 km3 (of which the largest one accounts for 0.17 km3), and are rotational slides and block topples with a low degree of rock fragmentation, although local relief is up to 400 m. The 3He and 21Ne surface exposure ages for six of these slides, as well as relative age assessment based on stratigraphic relation with glacial deposits and the drainage development on the rockslide deposit, suggest that the rockslide ages spread rather randomly betweenpre-glacial and mid Holocene, discarding climatic conditions as a common triggering factor. The absence of structures that can represent ideal sliding planes shows that rock fracturing due to neotectonic activity is a major conditioning factor for failures and that the magnitude of landslides is strongly controlled by the type of deformation.
Fil: Penna, Ivanna Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Laboratorio de Tectónica Andina; Argentina
Fil: Hermanns, Reginald L.. Geological Survey of Norway; Noruega
Fil: Niedermann, Samuel. Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum; Alemania
Fil: Folguera Telichevsky, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Laboratorio de Tectónica Andina; Argentina
description Quaternary tectonic activity in the transition area between the Central and Patagonian Andes is closely associated with an anomalous cluster of rockslides: 19 rockslides with volumes up to 4 × 109 m3 developed in plateau basalts. We divided them into two groups: (A) rockslides related to neotectonic activity and (B) rockslides not related to neotectonic activity. Thirteen rockslides, with a total volume of ~10 km3, which lie on either folds or faults, have been displaced parallel to the structures and perpendicular to the valleyaxis, and they exhibit headscarps several kilometersaway from the valley axis. Most of them are larger than 109 m3, and are generally of rock avalanche type with a high degree of crushing of rocks, although local relief in some cases does not exceed 200 m. Nine rockslides with a total volume of 8.9 km3 are related to folds, while four with a total volume of 1.3 km3 are related to faults. The six rockslides not related to neotectonic activity have a totalvolume of 0.25 km3 (of which the largest one accounts for 0.17 km3), and are rotational slides and block topples with a low degree of rock fragmentation, although local relief is up to 400 m. The 3He and 21Ne surface exposure ages for six of these slides, as well as relative age assessment based on stratigraphic relation with glacial deposits and the drainage development on the rockslide deposit, suggest that the rockslide ages spread rather randomly betweenpre-glacial and mid Holocene, discarding climatic conditions as a common triggering factor. The absence of structures that can represent ideal sliding planes shows that rock fracturing due to neotectonic activity is a major conditioning factor for failures and that the magnitude of landslides is strongly controlled by the type of deformation.
publishDate 2011
dc.date.none.fl_str_mv 2011-09
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/11336/68488
Penna, Ivanna Marina; Hermanns, Reginald L.; Niedermann, Samuel; Folguera Telichevsky, Andres; Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, Argentina; Geological Society of America; Geological Society of America Bulletin; 123; 9-10; 9-2011; 1880-1895
0016-7606
1943-2674
CONICET Digital
CONICET
url http://hdl.handle.net/11336/68488
identifier_str_mv Penna, Ivanna Marina; Hermanns, Reginald L.; Niedermann, Samuel; Folguera Telichevsky, Andres; Multiple slope failures associated with neotectonic activity in the Southern Central Andes (37° -37°30's), Patagonia, Argentina; Geological Society of America; Geological Society of America Bulletin; 123; 9-10; 9-2011; 1880-1895
0016-7606
1943-2674
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1130/B30399.1
info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/gsa/gsabulletin/article/123/9-10/1880-1895/125710
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
dc.publisher.none.fl_str_mv Geological Society of America
publisher.none.fl_str_mv Geological Society of America
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 12.982451

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