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dc.contributor.authorLohmar, Silke
dc.contributor.authorRobin, Claude
dc.contributor.authorGourgaud, Alain
dc.contributor.authorClavero, Jorge
dc.contributor.authorParada, Miguel Angel
dc.contributor.authorMoreno, Hugo
dc.contributor.authorErsoy, Orkun
dc.contributor.authorLopez-Escobar, Leopoldo
dc.contributor.authorNaranjo, Jose Antonio
dc.date.accessioned2019-12-13T10:57:50Z
dc.date.available2019-12-13T10:57:50Z
dc.date.issued2007
dc.identifier.issn0716-0208
dc.identifier.urihttps://doi.org/
dc.identifier.urihttp://hdl.handle.net/11655/18918
dc.description.abstractVillarrica is an active stratovolcano located in the Southern Andean Volcanic Zone. About 13,800 years BP (conventional radiocarbon ages), this volcano experienced major explosive eruptions which resulted in the emission of a sequence of pyroclastic flows, known as the 'Lican lgnimbrite', the bulk volume of which is estimated in similar to 10 km(3) (non-DRE, Dense Rock Equivalent). The deposits mainly consist of massive pyroclastic flows and stratified pyroclastic surges. Typical flow facies show scoriaceous bombs, dense juvenile blocks, lithics and scoria lapilli immersed in a dark-grey to brownish matrix, Whereas surges expose lapilli-sized scoria in a fine, light-brown or yellow-green matrix. Juvenile clasts range from 55 to 58 wt% SiO2 in composition. This paper describes the general architecture of the Lican lgnimbrite deposits and, based on SEM (Scanning Electron Microscope) observations and lithologic data, emphasizes the role of fragmentation due to magma-water interaction during the eruption. The results indicate that gas expansion was an important process. However, field characteristics, surface textures of ashes, enrichment of lithics towards the top of the sequence and variable palagonitization of matrix glass show the intervention of water since the initial stages of the eruption and its increasing influence during the later phases.
dc.language.isoen
dc.publisherServicio Nacional Geologia Minerva
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectGeology
dc.titleEvidence Of Magma-Water Interaction During The 13,800 Years Bp Explosive Cycle Of The Lican Ignimbrite, Villarrica Volcano (Southern Chile)tr_en
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.relation.journalRevista Geologica De Chile
dc.contributor.departmentJeoloji Mühendisliği
dc.identifier.volume34
dc.identifier.issue2
dc.identifier.startpage233
dc.identifier.endpage247
dc.indexingWoS


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