Landslide processes related to recurrent explosive eruptions in the Southern Andes of Chile (39° S)

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datacite.alternateIdentifier.citationJournal of South American Earth Sciences, 157, 2025
datacite.alternateIdentifier.doi10.1016/j.jsames.2025.105469
datacite.alternateIdentifier.issn0895-9811
datacite.creatorVásquez-Antipán, Daniel
datacite.creatorFustos, Ivo
datacite.creatorRiffo-López, José
datacite.creatorCortez-Díaz, Ana
datacite.creatorBravo, Álvaro
datacite.creatorMoreno-Yaeger, Pablo
datacite.date2025
datacite.rightsRegistro bibliográfico
datacite.subjectLandslides
datacite.subjectNatural Hazards
datacite.subjectPyroclastic Soils
datacite.subjectSouthern Andes
datacite.subjectExplosive Volcanism
datacite.subjectLandslide
datacite.subjectNatural Hazard
datacite.subjectPyroclastic Deposit
datacite.subjectVolcanic Eruption
datacite.subjectAndes
datacite.subjectLos Rios [chile]
datacite.subjectMocho-choshuenco
datacite.subjectSouthern Volcanic Zone
datacite.titleLandslide processes related to recurrent explosive eruptions in the Southern Andes of Chile (39° S)
dc.date.accessioned2025-10-06T14:21:59Z
dc.date.available2025-10-06T14:21:59Z
dc.description.abstractLandslides are one of the most hazardous geological processes due to their difficult-to-predict nature and destructive effects, often leading to significant loss of life, infrastructure damage, and environmental disruption. In the Southern Andes of Chile, landslides are particularly frequent and destructive due to a combination of factors, including high seismic activity, steep topography, and the presence of weak, unconsolidated pyroclastic soils. Unfortunately, the geomechanical control of landslide initiation in the Southern Andes is still poorly understood, creating a significant source of uncertainty in developing accurate landslide susceptibility or risk models. This study evaluates the geological and geotechnical factors that control the generation of landslides in pyroclastic soils using in situ data, laboratory analysis and remote sensing approaches. The study area covers the surroundings of the Mocho-Choshuenco Volcanic Complex (MCVC), one of the most explosive volcanoes in the Southern Andes. The results show that the landslides are placed on slopes covered by multiple explosive eruptions that include a period of more than 12 ka. Landslide activity is related to pyroclastic soils with significant weathering and halloysite content. In addition, the geotechnical characteristics show very light soils, with high-water retention capacity, which is vital to induce mechanical instability. The detected deformation may be associated with seasonal precipitation that would increase the pore water pressure and reduce the shear strength of the soil, promoting slow-moving landslides. The geological and geotechnical characteristics of the soils suggests that slow-moving landslides would be extended to a large part of the Southern Andes. Finally, this study contributes to improving hazard assessment to mitigate the impact of landslides on the population, infrastructures and natural resources in the Southern Andes. © 2025 Elsevier B.V., All rights reserved.
dc.description.ia_keywordlandslides, southern, andes, soils, landslide, geological, significant
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/6893
dc.language.isoen
dc.publisherElsevier BV
dc.relationinstname: ANID
dc.relationreponame: Repositorio Digital RI2.0
dc.rights.driverinfo:eu-repo/semantics/openAccess
dc.sourceJournal of South American Earth Sciences
dc.subject.ia_odsODS 6: Agua limpia y saneamiento
dc.subject.ia_oecd1nCiencias Naturales
dc.subject.ia_oecd2nCiencias Físicas
dc.subject.ia_oecd3nCiencias de la Tierra y Medioambientales
dc.type.driverinfo:eu-repo/semantics/article
dc.type.driverhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.type.openaireinfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
oaire.citationEdition2025
oaire.citationTitleJournal of South American Earth Sciences
oaire.citationVolume157
oaire.fundingReferenceANID FONDECYT 11180500, 1230792
oaire.fundingReferencePCP22-0006
oaire.fundingReferenceUFRO POSTGRADO (apoyo tesis)
oaire.fundingReferenceANID DOCTORADO NACIONAL 21240499
oaire.licenseConditionCopyright © Elsevier Ltd, 2025
oaire.resourceTypeArtículo
oaire.resourceType.enArticle
uct.catalogadorjvu
uct.comunidadIngenieríaen_US
uct.departamentoDepartamento de Obras Civiles y Geología
uct.facultadFacultad de Ingeniería
uct.indizacionScience Citation Index Expanded - SCIE
uct.indizacionScopus
uct.indizacionGeoRef
uct.indizacionChemical Abstracts Service (CAS)
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