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Página principal > Artículos > Artículos publicados > The timing and widespread effects of the largest Holocene volcanic eruption in Antarctica |
Fecha: | 2018 |
Resumen: | The caldera collapse of Deception Island Volcano, Antarctica, was comparable in scale to some of the largest eruptions on Earth over the last several millennia. Despite its magnitude and potential for far-reaching environmental effects, the age of this event has never been established, with estimates ranging from the late Pleistocene to 3370 years before present. Here we analyse nearby lake sediments in which we identify a singular event produced by Deception Island's caldera collapse that occurred 3980 ± 125 calibrated years before present. The erupted tephra record the distinct geochemical composition of ejecta from the caldera-forming eruption, whilst an extreme seismic episode is recorded by lake sediments immediately overlying the collapse tephra. The newly constrained caldera collapse is now the largest volcanic eruption confirmed in Antarctica during the Holocene. An examination of palaeorecords reveals evidence in marine and lacustrine sediments for contemporaneous seismicity around the Antarctic Peninsula; synchronous glaciochemical volcanic signatures also record the eruption in ice cores spread around Antarctica, reaching >4600 km from source. The widespread footprint suggests that this eruption would have had significant climatic and ecological effects across a vast area of the south polar region. |
Ayudas: | Ministerio de Educación y Ciencia POL2006-06635 Ministerio de Ciencia e Innovación RYC-2011-07584 Ministerio de Ciencia e Innovación CTM2009-05919-E Ministerio de Ciencia e Innovación CGL2010-22022-C02-02 Ministerio de Economía y Competitividad CGL2015-72629-EXP Ministerio de Ciencia e Innovación CTM2016-79617-P Ministerio de Economía y Competitividad RYC-2012-11024 Ministerio de Ciencia e Innovación CTM2009-07869-E Ministerio de Economía y Competitividad RYC-2015-17597 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1102 |
Derechos: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió publicada |
Materia: | Deception Island ; Caldera Collapse ; Caldera-forming Eruption ; Rapid Deposition Event ; Byers Peninsula |
Publicado en: | Scientific reports, Vol. 8 (November 2018) , art. 17279, ISSN 2045-2322 |
11 p, 2.2 MB |