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Fast Holocene slip and localized strain along the Liquiñe-Ofqui strike-slip fault system, Chile.
Astudillo-Sotomayor, Luis; Jara-Muñoz, Julius; Melnick, Daniel; Cortés-Aranda, Joaquín; Tassara, Andrés; Strecker, Manfred R.
Afiliação
  • Astudillo-Sotomayor L; Millennium Nucleus the Seismic Cycle Along Subduction Zones, Valdivia, Chile. luisastudillo@udec.cl.
  • Jara-Muñoz J; Departamento de Ciencias de la Tierra, Universidad de Concepción, Concepción, Chile. luisastudillo@udec.cl.
  • Melnick D; Millennium Nucleus the Seismic Cycle Along Subduction Zones, Valdivia, Chile.
  • Cortés-Aranda J; Institute of Geosciences, University of Potsdam, Potsdam, Germany.
  • Tassara A; Millennium Nucleus the Seismic Cycle Along Subduction Zones, Valdivia, Chile.
  • Strecker MR; Instituto de Ciencias de la Tierra, TAQUACh, Universidad Austral de Chile, Valdivia, Chile.
Sci Rep ; 11(1): 5970, 2021 Mar 16.
Article em En | MEDLINE | ID: mdl-33727574
In active tectonic settings dominated by strike-slip kinematics, slip partitioning across subparallel faults is a common feature; therefore, assessing the degree of partitioning and strain localization is paramount for seismic hazard assessments. Here, we estimate a slip rate of 18.8 ± 2.0 mm/year over the past 9.0 ± 0.1 ka for a single strand of the Liquiñe-Ofqui Fault System, which straddles the Main Cordillera in Southern Chile. This Holocene rate accounts for ~ 82% of the trench-parallel component of oblique plate convergence and is similar to million-year estimates integrated over the entire fault system. Our results imply that strain localizes on a single fault at millennial time scale but over longer time scales strain localization is not sustained. The fast millennial slip rate in the absence of historical Mw > 6.5 earthquakes along the Liquiñe-Ofqui Fault System implies either a component of aseismic slip or Mw ~ 7 earthquakes involving multi-trace ruptures and > 150-year repeat times. Our results have implications for the understanding of strike-slip fault system dynamics within volcanic arcs and seismic hazard assessments.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE País/Região como assunto: America do sul / Chile Idioma: En Revista: Sci Rep Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Chile País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE País/Região como assunto: America do sul / Chile Idioma: En Revista: Sci Rep Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Chile País de publicação: Reino Unido