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Title

Impacto ambiental de la interacción agua-ceniza en la erupción del 2011 del volcán Grimsvötn (Islandia)

AuthorsCabré, J.; Aulinas, M.; Rejas, Marta ; Fernandez-Turiel, J. L.
Keywordsflujo geoquímico
volcán Grímsvötn
leaching experiments
volcanic ash
Grímsvötn volcano
geochemical flux
ensayos de lixiviación
ceniza volcánica
Issue Date2016
PublisherSociedad Geológica de España
CitationGeotemas 16: 535-538 (2016)
AbstractThe Grímsvötn volcanic eruption, from 21 to 28 May, 2011, was the largest eruption of the Grímsvötn Volcanic System since 1873. The main geochemical features of the potential environmental impact of the volcanic ash-water interaction were determined using two different leaching methods as proxies (batch and vertical flow through column experiments). The main findings reveal that Na, K, Ca, Mg, Si, Cl, S and F show the largest geochemical fluxes caused by the interaction of water and ash. Additionally, the significant amounts of some of these elements (Ca, S and Mg) together with P, Cl, Fe, which are usually considered as macro/micronutrients, demonstrates the fertilising potential of the May 2011 emitted ash. On the other hand, release of F highlights the possible environmental problems arising from ash fallout on land or into fresh water syste ms. It is noteworthy that the chemical release is maximal during the first few hours of contact between tephra and water due to the dissolution of soluble salts from the ash surface. As time progresses, these constituents are exhausted, the release drops considerably and elements are freed instead by the incongruent dissolution of the volcanic glass.
URIhttp://hdl.handle.net/10261/148490
Identifiersissn: 1576-5172
Appears in Collections:(ICTJA) Artículos
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