Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of Argentina

Autores
Escobares Becerra, Marina Karim; López, Melina; Spagnotto, Silvana Liz; Morosini, Augusto Francisco; Richard, Andrés David; Mescua, Jose Francisco
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this work, we study the seismic activity and tectonic regime in the region of the Sierras de Velasco, Ambato and Ancasti, belonging to the Sierras Pampeanas. These areas exhibit notable seismic activity, posing a considerable risk for populations in the region. We relocated the most important seismic events of the last twenty years and obtained their focal mechanisms. We reviewed the field evidence of neotectonic deformation, and measured kinematic indicators on Quaternary faults interpreted as seismogenic. Based on this information, we discuss the link between seismogenic sources and the most relevant morphostructural features. Our findings reveal that the seismicity is dominated by reverse focal mechanisms, exhibiting nodal planes with strikes that align with the main structures. This indicates that the main range-bounding faults are the most important seismogenic structures in the area. Some events have strike-slip movements, likely associated with the reactivation of basement fabrics. Additionally, in the Pirquitas area, we observed a normal focal mechanism, oriented perpendicular to the main structures. Our results contribute to a better understanding of current deformation dynamics and of seismic hazard in the region, and underscore the need for more detailed studies.
Fil: Escobares Becerra, Marina Karim. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: López, Melina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina
Fil: Spagnotto, Silvana Liz. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Morosini, Augusto Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina
Fil: Richard, Andrés David. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina
Fil: Mescua, Jose Francisco. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Materia
Sierras Pampeanas
Seismicity
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:11336/265419
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of ArgentinaEscobares Becerra, Marina KarimLópez, MelinaSpagnotto, Silvana LizMorosini, Augusto FranciscoRichard, Andrés DavidMescua, Jose FranciscoSierras PampeanasSeismicityhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1In this work, we study the seismic activity and tectonic regime in the region of the Sierras de Velasco, Ambato and Ancasti, belonging to the Sierras Pampeanas. These areas exhibit notable seismic activity, posing a considerable risk for populations in the region. We relocated the most important seismic events of the last twenty years and obtained their focal mechanisms. We reviewed the field evidence of neotectonic deformation, and measured kinematic indicators on Quaternary faults interpreted as seismogenic. Based on this information, we discuss the link between seismogenic sources and the most relevant morphostructural features. Our findings reveal that the seismicity is dominated by reverse focal mechanisms, exhibiting nodal planes with strikes that align with the main structures. This indicates that the main range-bounding faults are the most important seismogenic structures in the area. Some events have strike-slip movements, likely associated with the reactivation of basement fabrics. Additionally, in the Pirquitas area, we observed a normal focal mechanism, oriented perpendicular to the main structures. Our results contribute to a better understanding of current deformation dynamics and of seismic hazard in the region, and underscore the need for more detailed studies.Fil: Escobares Becerra, Marina Karim. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: López, Melina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; ArgentinaFil: Spagnotto, Silvana Liz. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Morosini, Augusto Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; ArgentinaFil: Richard, Andrés David. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; ArgentinaFil: Mescua, Jose Francisco. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaPergamon-Elsevier Science Ltd2024-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/265419Escobares Becerra, Marina Karim; López, Melina; Spagnotto, Silvana Liz; Morosini, Augusto Francisco; Richard, Andrés David; et al.; Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 148; 8-2024; 1-360895-9811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0895981124003043info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2024.105082info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:50:01Zoai:ri.conicet.gov.ar:11336/265419instacron: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 09:50:02.231CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of Argentina
title Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of Argentina
spellingShingle Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of Argentina
Escobares Becerra, Marina Karim
Sierras Pampeanas
Seismicity
title_short Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of Argentina
title_full Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of Argentina
title_fullStr Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of Argentina
title_full_unstemmed Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of Argentina
title_sort Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of Argentina
dc.creator.none.fl_str_mv Escobares Becerra, Marina Karim
López, Melina
Spagnotto, Silvana Liz
Morosini, Augusto Francisco
Richard, Andrés David
Mescua, Jose Francisco
author Escobares Becerra, Marina Karim
author_facet Escobares Becerra, Marina Karim
López, Melina
Spagnotto, Silvana Liz
Morosini, Augusto Francisco
Richard, Andrés David
Mescua, Jose Francisco
author_role author
author2 López, Melina
Spagnotto, Silvana Liz
Morosini, Augusto Francisco
Richard, Andrés David
Mescua, Jose Francisco
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Sierras Pampeanas
Seismicity
topic Sierras Pampeanas
Seismicity
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In this work, we study the seismic activity and tectonic regime in the region of the Sierras de Velasco, Ambato and Ancasti, belonging to the Sierras Pampeanas. These areas exhibit notable seismic activity, posing a considerable risk for populations in the region. We relocated the most important seismic events of the last twenty years and obtained their focal mechanisms. We reviewed the field evidence of neotectonic deformation, and measured kinematic indicators on Quaternary faults interpreted as seismogenic. Based on this information, we discuss the link between seismogenic sources and the most relevant morphostructural features. Our findings reveal that the seismicity is dominated by reverse focal mechanisms, exhibiting nodal planes with strikes that align with the main structures. This indicates that the main range-bounding faults are the most important seismogenic structures in the area. Some events have strike-slip movements, likely associated with the reactivation of basement fabrics. Additionally, in the Pirquitas area, we observed a normal focal mechanism, oriented perpendicular to the main structures. Our results contribute to a better understanding of current deformation dynamics and of seismic hazard in the region, and underscore the need for more detailed studies.
Fil: Escobares Becerra, Marina Karim. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: López, Melina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina
Fil: Spagnotto, Silvana Liz. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Morosini, Augusto Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina
Fil: Richard, Andrés David. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina
Fil: Mescua, Jose Francisco. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
description In this work, we study the seismic activity and tectonic regime in the region of the Sierras de Velasco, Ambato and Ancasti, belonging to the Sierras Pampeanas. These areas exhibit notable seismic activity, posing a considerable risk for populations in the region. We relocated the most important seismic events of the last twenty years and obtained their focal mechanisms. We reviewed the field evidence of neotectonic deformation, and measured kinematic indicators on Quaternary faults interpreted as seismogenic. Based on this information, we discuss the link between seismogenic sources and the most relevant morphostructural features. Our findings reveal that the seismicity is dominated by reverse focal mechanisms, exhibiting nodal planes with strikes that align with the main structures. This indicates that the main range-bounding faults are the most important seismogenic structures in the area. Some events have strike-slip movements, likely associated with the reactivation of basement fabrics. Additionally, in the Pirquitas area, we observed a normal focal mechanism, oriented perpendicular to the main structures. Our results contribute to a better understanding of current deformation dynamics and of seismic hazard in the region, and underscore the need for more detailed studies.
publishDate 2024
dc.date.none.fl_str_mv 2024-08
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/11336/265419
Escobares Becerra, Marina Karim; López, Melina; Spagnotto, Silvana Liz; Morosini, Augusto Francisco; Richard, Andrés David; et al.; Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 148; 8-2024; 1-36
0895-9811
CONICET Digital
CONICET
url http://hdl.handle.net/11336/265419
identifier_str_mv Escobares Becerra, Marina Karim; López, Melina; Spagnotto, Silvana Liz; Morosini, Augusto Francisco; Richard, Andrés David; et al.; Seismotectonic study in the Sierras de Velasco, Ambato, and Ancasti, Eastern Sierras Pampeanas of Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 148; 8-2024; 1-36
0895-9811
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://linkinghub.elsevier.com/retrieve/pii/S0895981124003043
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2024.105082
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
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
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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