Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/46944
DC FieldValueLanguage
dc.contributor.authorPérez-Torrado, F. J.en_US
dc.contributor.authorMarti, J.en_US
dc.contributor.authorMangas, J.en_US
dc.contributor.authorDay, S.en_US
dc.contributor.otherMarti, Joan-
dc.contributor.otherPerez-Torrado, Francisco Jose-
dc.date.accessioned2018-11-23T09:36:49Z-
dc.date.available2018-11-23T09:36:49Z-
dc.date.issued1997en_US
dc.identifier.issn0258-8900en_US
dc.identifier.urihttp://hdl.handle.net/10553/46944-
dc.description.abstractNon-welded, lithic-rich ignimbrites, hereintermed the Roque Nublo ignimbrites, are the most distinctive deposits of the Pliocene Roque Nublo group, which forms the products of second magmatic cycle on Gran Canaria. They are very heterogeneous, with 35–55% volume lithic fragments, 15-30% mildly vesiculated pumice, 5–7% crystals and 20–30% ash matrix. The vitric components (pumice fragments and ash matrix) are largely altered and transformed into zeolites and subordinate smectites. The Roque Nublo ignimbrites originated from hydrovolcanic eruptions that caused rapid and significant erosion of vents thus incorporating a high proportion of lithic clasts into the eruption columns. These columns rapidly became too dense to be sustained as vertical eruption columns and were transformed into tephra fountains which fed high-density pyroclastic flows. The deposits from these flows were mainly confined to palaeovalleys and topographic depressions. In distal areas close to the coast line, where these palaeovalleys widened, most of the pyroclastic flows expanded laterally and formed numerous thin flow units. The combined effect of the magma–water interaction and the high content of lithic fragments is sufficient to explain the characteristic low emplacement temperature of the Roque Nublo ignimbrites. This fact also explains the transition from pyroclastic flows into lahar deposits observed in distal facies of the Roque Nublo ignimbrites. The existence of hydrovolcanic eruptions generating high-density pyroclastic flows, unable to efficiently separate the water vapour from the vitric components during transport, also accounts for the intense zeolitic alteration in these deposits.en_US
dc.languageengen_US
dc.publisher0258-8900-
dc.relation.ispartofBulletin of Volcanologyen_US
dc.sourceBulletin of Volcanology [ISSN 0258-8900], v. 58, p. 647-654en_US
dc.subject250621 Vulcanologíaen_US
dc.subject.otherHydrovolcanic eruptionsen_US
dc.subject.otherPyroclastic flowsen_US
dc.subject.otherRoque Nublo ignimbritesen_US
dc.subject.otherGran Canaria (Canary Islands)en_US
dc.titleIgnimbrites of the Roque Nublo group, Gran Canaria, Canary Islandsen_US
dc.typeinfo:eu-repo/semantics/Articlees
dc.typeArticlees
dc.identifier.doi10.1007/s004450050168
dc.identifier.scopus0031463673-
dc.identifier.isiA1997XM66000005-
dcterms.isPartOfBulletin Of Volcanology-
dcterms.sourceBulletin Of Volcanology[ISSN 0258-8900],v. 58 (8), p. 647-654-
dc.contributor.authorscopusid6602207526-
dc.contributor.authorscopusid7202923564-
dc.contributor.authorscopusid56114334400-
dc.contributor.authorscopusid26643261900-
dc.description.lastpage654-
dc.description.firstpage647-
dc.relation.volume58-
dc.investigacionCienciasen_US
dc.type2Artículoen_US
dc.identifier.wosWOS:A1997XM66000005-
dc.contributor.daisngid1111499-
dc.contributor.daisngid159261-
dc.contributor.daisngid1765426-
dc.contributor.daisngid6892395-
dc.contributor.daisngid32914970
dc.identifier.investigatorRIDL-4203-2014-
dc.identifier.investigatorRIDN-9727-2018-
dc.contributor.wosstandardWOS:PerezTorrado, FJ
dc.contributor.wosstandardWOS:Marti, J
dc.contributor.wosstandardWOS:Mangas, J
dc.contributor.wosstandardWOS:Day, S
dc.date.coverdateEnero 1997
dc.identifier.ulpgces
dc.description.jcr1,211
dc.description.jcrqQ2
dc.description.scieSCIE
item.fulltextSin texto completo-
item.grantfulltextnone-
crisitem.author.deptGIR IUNAT: Geología de Terrenos Volcánicos-
crisitem.author.deptIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.deptDepartamento de Física-
crisitem.author.deptGIR IOCAG:Geología Aplicada y Regional-
crisitem.author.deptIU de Oceanografía y Cambio Global-
crisitem.author.deptDepartamento de Física-
crisitem.author.orcid0000-0002-4644-0875-
crisitem.author.orcid0000-0002-3286-743X-
crisitem.author.parentorgIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.parentorgIU de Oceanografía y Cambio Global-
crisitem.author.fullNamePérez Torrado, Francisco José-
crisitem.author.fullNameMangas Viñuela, José-
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