A past-millennium maximum in postglacial activity from Volcán Chaitén, southern Chile

Autores
Moreno, Patricio I.; Alloway, B. V.; Villarosa, Gustavo; Outes, Ana Valeria; Henriquez, W. I.; de Pol Holz, R.; Pearce, N. J. G.
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Volcán Chaitén (southern Chile, ∼43°S) initiated an historically unprecedented eruption in A.D. 2008, surprising the local inhabitants, Chilean and Argentine authorities, and the geologic community. Available data at the time indicated an absence of explosive eruptions from this rhyolitic volcano since a large-magnitude eruptive event dated at ca. 10,500 yr B.P. We present lake-sediment data from Lago Teo, a small closed-basin lake located in the immediate vicinity of both Chaitén township and the volcano, that spans the past ∼10,000 yr and contains 26 pyroclastic fallout deposits. Glass-shard electron microprobe analyses revealed ten rhyolitic tephras indistinguishable in composition from the 2008 Volcán Chaitén eruption, and ten others potentially derived from the Michinmahuida volcanic complex. Among the rhyolites, we detected three closely spaced tephras deposited between ca. 9460 and 9680 yr B.P., followed by two thick tephras dated at ca. 7700 and ca. 5080 yr B.P. Three other closely spaced tephras occur between ca. 600 and 850 yr B.P., the most recent prehistoric event at ca. 420 yr B.P., and a 3-cm-thick tephra deposited during the 2008 event. We calculate a median recurrence of ∼310 yr between eruptive events from all sources over the past ∼10,000 yr, and ∼200 yr between Volcán Chaitén events over the past millennium. Our results not only challenge the notion of an ∼10,500-yr-long quiescence for Volcán Chaitén activity, but also suggest that the 2008 eruption was an overdue phenomenon in the context of its postglacial eruptive history, illustrating the advantage and absolute necessity of utilizing lake-sediment archives for developing continuous well-dated time series inventories of explosive volcanic events.
Fil: Moreno, Patricio I.. Universidad de Chile; Chile
Fil: Alloway, B. V.. Victoria University of Wellington; Nueva Zelanda
Fil: Villarosa, Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación En Biodiversidad y Medioambiente; Argentina. Universidad Nacional del Comahue; Argentina
Fil: Outes, Ana Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación En Biodiversidad y Medioambiente; Argentina. Universidad Nacional del Comahue; Argentina
Fil: Henriquez, W. I.. Universidad de Chile; Chile
Fil: de Pol Holz, R.. Universidad de Concepción; Chile
Fil: Pearce, N. J. G.. Aberystwyth University; Reino Unido
Materia
Tephrochronology
Volcan Chaiten
Michinmahuida Volcanic Complex
Eruptive History
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/12208
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A past-millennium maximum in postglacial activity from Volcán Chaitén, southern ChileMoreno, Patricio I.Alloway, B. V.Villarosa, GustavoOutes, Ana ValeriaHenriquez, W. I.de Pol Holz, R.Pearce, N. J. G.TephrochronologyVolcan ChaitenMichinmahuida Volcanic ComplexEruptive Historyhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Volcán Chaitén (southern Chile, ∼43°S) initiated an historically unprecedented eruption in A.D. 2008, surprising the local inhabitants, Chilean and Argentine authorities, and the geologic community. Available data at the time indicated an absence of explosive eruptions from this rhyolitic volcano since a large-magnitude eruptive event dated at ca. 10,500 yr B.P. We present lake-sediment data from Lago Teo, a small closed-basin lake located in the immediate vicinity of both Chaitén township and the volcano, that spans the past ∼10,000 yr and contains 26 pyroclastic fallout deposits. Glass-shard electron microprobe analyses revealed ten rhyolitic tephras indistinguishable in composition from the 2008 Volcán Chaitén eruption, and ten others potentially derived from the Michinmahuida volcanic complex. Among the rhyolites, we detected three closely spaced tephras deposited between ca. 9460 and 9680 yr B.P., followed by two thick tephras dated at ca. 7700 and ca. 5080 yr B.P. Three other closely spaced tephras occur between ca. 600 and 850 yr B.P., the most recent prehistoric event at ca. 420 yr B.P., and a 3-cm-thick tephra deposited during the 2008 event. We calculate a median recurrence of ∼310 yr between eruptive events from all sources over the past ∼10,000 yr, and ∼200 yr between Volcán Chaitén events over the past millennium. Our results not only challenge the notion of an ∼10,500-yr-long quiescence for Volcán Chaitén activity, but also suggest that the 2008 eruption was an overdue phenomenon in the context of its postglacial eruptive history, illustrating the advantage and absolute necessity of utilizing lake-sediment archives for developing continuous well-dated time series inventories of explosive volcanic events.Fil: Moreno, Patricio I.. Universidad de Chile; ChileFil: Alloway, B. V.. Victoria University of Wellington; Nueva ZelandaFil: Villarosa, Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación En Biodiversidad y Medioambiente; Argentina. Universidad Nacional del Comahue; ArgentinaFil: Outes, Ana Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación En Biodiversidad y Medioambiente; Argentina. Universidad Nacional del Comahue; ArgentinaFil: Henriquez, W. I.. Universidad de Chile; ChileFil: de Pol Holz, R.. Universidad de Concepción; ChileFil: Pearce, N. J. G.. Aberystwyth University; Reino UnidoGeological Society Of America2014-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/12208Moreno, Patricio I.; Alloway, B. V.; Villarosa, Gustavo; Outes, Ana Valeria; Henriquez, W. I.; et al.; A past-millennium maximum in postglacial activity from Volcán Chaitén, southern Chile; Geological Society Of America; Geology; 43; 1; 11-2014; 47-500091-76131943-2682enginfo:eu-repo/semantics/altIdentifier/doi/10.1130/G36248.1info:eu-repo/semantics/altIdentifier/url/http://geology.gsapubs.org/content/43/1/47info:eu-repo/semantics/altIdentifier/url/http://geology.geoscienceworld.org/content/43/1/47info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:02:07Zoai:ri.conicet.gov.ar:11336/12208instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:02:07.353CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A past-millennium maximum in postglacial activity from Volcán Chaitén, southern Chile
title A past-millennium maximum in postglacial activity from Volcán Chaitén, southern Chile
spellingShingle A past-millennium maximum in postglacial activity from Volcán Chaitén, southern Chile
Moreno, Patricio I.
Tephrochronology
Volcan Chaiten
Michinmahuida Volcanic Complex
Eruptive History
title_short A past-millennium maximum in postglacial activity from Volcán Chaitén, southern Chile
title_full A past-millennium maximum in postglacial activity from Volcán Chaitén, southern Chile
title_fullStr A past-millennium maximum in postglacial activity from Volcán Chaitén, southern Chile
title_full_unstemmed A past-millennium maximum in postglacial activity from Volcán Chaitén, southern Chile
title_sort A past-millennium maximum in postglacial activity from Volcán Chaitén, southern Chile
dc.creator.none.fl_str_mv Moreno, Patricio I.
Alloway, B. V.
Villarosa, Gustavo
Outes, Ana Valeria
Henriquez, W. I.
de Pol Holz, R.
Pearce, N. J. G.
author Moreno, Patricio I.
author_facet Moreno, Patricio I.
Alloway, B. V.
Villarosa, Gustavo
Outes, Ana Valeria
Henriquez, W. I.
de Pol Holz, R.
Pearce, N. J. G.
author_role author
author2 Alloway, B. V.
Villarosa, Gustavo
Outes, Ana Valeria
Henriquez, W. I.
de Pol Holz, R.
Pearce, N. J. G.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Tephrochronology
Volcan Chaiten
Michinmahuida Volcanic Complex
Eruptive History
topic Tephrochronology
Volcan Chaiten
Michinmahuida Volcanic Complex
Eruptive History
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Volcán Chaitén (southern Chile, ∼43°S) initiated an historically unprecedented eruption in A.D. 2008, surprising the local inhabitants, Chilean and Argentine authorities, and the geologic community. Available data at the time indicated an absence of explosive eruptions from this rhyolitic volcano since a large-magnitude eruptive event dated at ca. 10,500 yr B.P. We present lake-sediment data from Lago Teo, a small closed-basin lake located in the immediate vicinity of both Chaitén township and the volcano, that spans the past ∼10,000 yr and contains 26 pyroclastic fallout deposits. Glass-shard electron microprobe analyses revealed ten rhyolitic tephras indistinguishable in composition from the 2008 Volcán Chaitén eruption, and ten others potentially derived from the Michinmahuida volcanic complex. Among the rhyolites, we detected three closely spaced tephras deposited between ca. 9460 and 9680 yr B.P., followed by two thick tephras dated at ca. 7700 and ca. 5080 yr B.P. Three other closely spaced tephras occur between ca. 600 and 850 yr B.P., the most recent prehistoric event at ca. 420 yr B.P., and a 3-cm-thick tephra deposited during the 2008 event. We calculate a median recurrence of ∼310 yr between eruptive events from all sources over the past ∼10,000 yr, and ∼200 yr between Volcán Chaitén events over the past millennium. Our results not only challenge the notion of an ∼10,500-yr-long quiescence for Volcán Chaitén activity, but also suggest that the 2008 eruption was an overdue phenomenon in the context of its postglacial eruptive history, illustrating the advantage and absolute necessity of utilizing lake-sediment archives for developing continuous well-dated time series inventories of explosive volcanic events.
Fil: Moreno, Patricio I.. Universidad de Chile; Chile
Fil: Alloway, B. V.. Victoria University of Wellington; Nueva Zelanda
Fil: Villarosa, Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación En Biodiversidad y Medioambiente; Argentina. Universidad Nacional del Comahue; Argentina
Fil: Outes, Ana Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación En Biodiversidad y Medioambiente; Argentina. Universidad Nacional del Comahue; Argentina
Fil: Henriquez, W. I.. Universidad de Chile; Chile
Fil: de Pol Holz, R.. Universidad de Concepción; Chile
Fil: Pearce, N. J. G.. Aberystwyth University; Reino Unido
description Volcán Chaitén (southern Chile, ∼43°S) initiated an historically unprecedented eruption in A.D. 2008, surprising the local inhabitants, Chilean and Argentine authorities, and the geologic community. Available data at the time indicated an absence of explosive eruptions from this rhyolitic volcano since a large-magnitude eruptive event dated at ca. 10,500 yr B.P. We present lake-sediment data from Lago Teo, a small closed-basin lake located in the immediate vicinity of both Chaitén township and the volcano, that spans the past ∼10,000 yr and contains 26 pyroclastic fallout deposits. Glass-shard electron microprobe analyses revealed ten rhyolitic tephras indistinguishable in composition from the 2008 Volcán Chaitén eruption, and ten others potentially derived from the Michinmahuida volcanic complex. Among the rhyolites, we detected three closely spaced tephras deposited between ca. 9460 and 9680 yr B.P., followed by two thick tephras dated at ca. 7700 and ca. 5080 yr B.P. Three other closely spaced tephras occur between ca. 600 and 850 yr B.P., the most recent prehistoric event at ca. 420 yr B.P., and a 3-cm-thick tephra deposited during the 2008 event. We calculate a median recurrence of ∼310 yr between eruptive events from all sources over the past ∼10,000 yr, and ∼200 yr between Volcán Chaitén events over the past millennium. Our results not only challenge the notion of an ∼10,500-yr-long quiescence for Volcán Chaitén activity, but also suggest that the 2008 eruption was an overdue phenomenon in the context of its postglacial eruptive history, illustrating the advantage and absolute necessity of utilizing lake-sediment archives for developing continuous well-dated time series inventories of explosive volcanic events.
publishDate 2014
dc.date.none.fl_str_mv 2014-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/12208
Moreno, Patricio I.; Alloway, B. V.; Villarosa, Gustavo; Outes, Ana Valeria; Henriquez, W. I.; et al.; A past-millennium maximum in postglacial activity from Volcán Chaitén, southern Chile; Geological Society Of America; Geology; 43; 1; 11-2014; 47-50
0091-7613
1943-2682
url http://hdl.handle.net/11336/12208
identifier_str_mv Moreno, Patricio I.; Alloway, B. V.; Villarosa, Gustavo; Outes, Ana Valeria; Henriquez, W. I.; et al.; A past-millennium maximum in postglacial activity from Volcán Chaitén, southern Chile; Geological Society Of America; Geology; 43; 1; 11-2014; 47-50
0091-7613
1943-2682
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1130/G36248.1
info:eu-repo/semantics/altIdentifier/url/http://geology.gsapubs.org/content/43/1/47
info:eu-repo/semantics/altIdentifier/url/http://geology.geoscienceworld.org/content/43/1/47
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Geological Society Of America
publisher.none.fl_str_mv Geological Society Of America
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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