Late Holocene history of Chaitén Volcano: New evidence for a 17th century eruption

Prior to May 2008, it was thought that the last eruption of Chaitén Volcano occurred more than 5,000 years ago, a rather long quiescent period for a volcano in such an active arc segment. However, increasingly more Holocene eruptions are being identified. This article presents both geological and hi...

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Autores principales:	Lara,Luis E, Moreno,Rodrigo, Amigo,Álvaro, Hoblitt,Richard P, Pierson,Thomas C
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2013
Materias:	Historical eruption Ash fallout Channel aggradation Chaitén Volcano Erupción histórica Caída de ceniza Agradación de canal Volcán Chaitén
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062013000200004
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spelling	oai:scielo:S0718-710620130002000042013-07-31Late Holocene history of Chaitén Volcano: New evidence for a 17th century eruptionLara,Luis EMoreno,RodrigoAmigo,ÁlvaroHoblitt,Richard PPierson,Thomas C Historical eruption Ash fallout Channel aggradation Chaitén Volcano Erupción histórica Caída de ceniza Agradación de canal Volcán Chaitén Prior to May 2008, it was thought that the last eruption of Chaitén Volcano occurred more than 5,000 years ago, a rather long quiescent period for a volcano in such an active arc segment. However, increasingly more Holocene eruptions are being identified. This article presents both geological and historical evidence for late Holocene eruptive activity in the 17th century (AD 1625-1658), which included an explosive rhyolitic eruption that produced pumice ash fallout east of the volcano and caused channel aggradation in the Chaitén River. The extents of tephra fall and channel aggradation were similar to those of May 2008. Fine ash, pumice and obsidian fragments in the pre-2008 deposits are unequivocally derived from Chaitén Volcano. This finding has important implications for hazards assessment in the area and suggests the eruptive frequency and magnitude should be more thoroughly studied.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.40 n.2 20132013-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062013000200004en10.5027/andgeoV40n2-a04
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Historical eruption Ash fallout Channel aggradation Chaitén Volcano Erupción histórica Caída de ceniza Agradación de canal Volcán Chaitén
spellingShingle	Historical eruption Ash fallout Channel aggradation Chaitén Volcano Erupción histórica Caída de ceniza Agradación de canal Volcán Chaitén Lara,Luis E Moreno,Rodrigo Amigo,Álvaro Hoblitt,Richard P Pierson,Thomas C Late Holocene history of Chaitén Volcano: New evidence for a 17th century eruption
description	Prior to May 2008, it was thought that the last eruption of Chaitén Volcano occurred more than 5,000 years ago, a rather long quiescent period for a volcano in such an active arc segment. However, increasingly more Holocene eruptions are being identified. This article presents both geological and historical evidence for late Holocene eruptive activity in the 17th century (AD 1625-1658), which included an explosive rhyolitic eruption that produced pumice ash fallout east of the volcano and caused channel aggradation in the Chaitén River. The extents of tephra fall and channel aggradation were similar to those of May 2008. Fine ash, pumice and obsidian fragments in the pre-2008 deposits are unequivocally derived from Chaitén Volcano. This finding has important implications for hazards assessment in the area and suggests the eruptive frequency and magnitude should be more thoroughly studied.
author	Lara,Luis E Moreno,Rodrigo Amigo,Álvaro Hoblitt,Richard P Pierson,Thomas C
author_facet	Lara,Luis E Moreno,Rodrigo Amigo,Álvaro Hoblitt,Richard P Pierson,Thomas C
author_sort	Lara,Luis E
title	Late Holocene history of Chaitén Volcano: New evidence for a 17th century eruption
title_short	Late Holocene history of Chaitén Volcano: New evidence for a 17th century eruption
title_full	Late Holocene history of Chaitén Volcano: New evidence for a 17th century eruption
title_fullStr	Late Holocene history of Chaitén Volcano: New evidence for a 17th century eruption
title_full_unstemmed	Late Holocene history of Chaitén Volcano: New evidence for a 17th century eruption
title_sort	late holocene history of chaitén volcano: new evidence for a 17th century eruption
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062013000200004
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_version_	1714205839862005760

Late Holocene history of Chaitén Volcano: New evidence for a 17th century eruption

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