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Authordc.contributor.authorCastruccio Álvarez, Angelo 
Authordc.contributor.authorContreras Vargas, María Angélica 
Admission datedc.date.accessioned2018-03-20T19:55:18Z
Available datedc.date.available2018-03-20T19:55:18Z
Publication datedc.date.issued2016-11-15
Cita de ítemdc.identifier.citationJournal of Volcanology and Geothermal Research 327 (2016) 469–483es_ES
Identifierdc.identifier.other10.1016/j.jvolgeores.2016.09.015
Identifierdc.identifier.urihttps://repositorio.uchile.cl/handle/2250/146916
Abstractdc.description.abstractWe analyzed two historical lava flows from the Southern Andes of Chile: The lava flows from the 1971 Villarrica volcano eruption and the 1988-1990 Lonquimay volcano eruption. The 1971 lava flow has a volume of 2.3 x 10(7) m(3), a maximum length of 16.5 km and was emplaced in two days, with maximum effusion rates of similar to 800 m(3)/s. The lava has a mean width of 150 m and thicknesses that decrease from 10 to 12 m at 5 km from the vent to 5-8 mat the flow front. The morphology is mainly 'a'(a) over bar. The 1988-1990 lava flow has a volume of 2.3 x 10(8) m3, a maximum length of 10.2 km and was emplaced in 330 days, with peak effusion rates of similar to 80 m(3)/s. The flow has a mean width of 600 m and thicknesses that increase from 10 to 15 m near the vent to >50 m at the front. The morphology varies from 'a'(a) over bar in proximal sectors to blocky in the rest of the flow. We modelled the advance rate and thickness of these flows assuming two possible dynamical regimes: An internal rheology regime modelled as a Herschel-Bulkley (HB) fluid and a Yield Strength in the Crust (YSC) regime. We compared our results with the widely used Newtonian and Bingham rheologies. Our results indicate that the 1971 flow can be modelled either by the HB, Bingham or Newtonian rheologies using a single temperature, while the 1988-1990 flow was controlled by the YSC regime. Our analysis and comparison of models shows that care should be taken when modelling a lava flow, as different rheologies and assumptions can reach the same results in terms of advance rate and flow thickness. These examples suggest that the crustal strength should be taken into account in any model of lava flow advance.es_ES
Patrocinadordc.description.sponsorshipFONDECYT project 11121298 FONDAP project 15090013es_ES
Lenguagedc.language.isoenes_ES
Publisherdc.publisherElsevier Sciencees_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
Sourcedc.sourceJournal of Volcanology and Geothermal Researches_ES
Keywordsdc.subjectLava flowses_ES
Keywordsdc.subjectLonquimay volcanoes_ES
Keywordsdc.subjectVillarrica volcanoes_ES
Keywordsdc.subjectEffusion ratees_ES
Keywordsdc.subjectRheologyes_ES
Títulodc.titleThe influence of effusion rate and rheology on lava flow dynamics and morphology: A case study from the 1971 and 1988–1990 eruptions at Villarrica and Lonquimay volcanoes, Southern Andes of Chilees_ES
Document typedc.typeArtículo de revista
Catalogueruchile.catalogadorpgves_ES
Indexationuchile.indexArtículo de publicación ISIes_ES


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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile