Geology, petrology and geochemistry of the dome complex of Huequi volcano, southern Chile

Huequi, a little-known volcano in the southern part of the Andean southern volcanic zone (SSVZ), shows a regionally unusual eruption style, mineralogy and geochemistry. The volcano comprises multiple highly-eroded lava domes. Past eruptions were accompanied by relatively minor explosive activity, mo...

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Main Authors:	Watt,Sebastian F.L, Pyle,David M, Mather,Tamsin A
Language:	English
Published:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2011
Subjects:	Huequi volcano Andean southern volcanic zone Andesite Amphibole Lava dome
Online Access:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062011000200005
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spelling	oai:scielo:S0718-710620110002000052011-09-28Geology, petrology and geochemistry of the dome complex of Huequi volcano, southern ChileWatt,Sebastian F.LPyle,David MMather,Tamsin A Huequi volcano Andean southern volcanic zone Andesite Amphibole Lava dome Huequi, a little-known volcano in the southern part of the Andean southern volcanic zone (SSVZ), shows a regionally unusual eruption style, mineralogy and geochemistry. The volcano comprises multiple highly-eroded lava domes. Past eruptions were accompanied by relatively minor explosive activity, most recently from 1890-1920. The rocks erupted by Huequi range from basaltic andesite to dacite, and are highly distinctive when compared to other volcanoes of the SSVZ, being K-poor and Al-rich, and containing euhedral hornblende phenocrysts. Overall compositions suggest a notably water-rich magma source, evolving through high levels of fractionation and subsequent degassing to produce highly porphyritic dome-forming andesites. The ultimate causes of water-rich magmas at this point in the arc remain unclear.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.38 n.2 20112011-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062011000200005en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Huequi volcano Andean southern volcanic zone Andesite Amphibole Lava dome
spellingShingle	Huequi volcano Andean southern volcanic zone Andesite Amphibole Lava dome Watt,Sebastian F.L Pyle,David M Mather,Tamsin A Geology, petrology and geochemistry of the dome complex of Huequi volcano, southern Chile
description	Huequi, a little-known volcano in the southern part of the Andean southern volcanic zone (SSVZ), shows a regionally unusual eruption style, mineralogy and geochemistry. The volcano comprises multiple highly-eroded lava domes. Past eruptions were accompanied by relatively minor explosive activity, most recently from 1890-1920. The rocks erupted by Huequi range from basaltic andesite to dacite, and are highly distinctive when compared to other volcanoes of the SSVZ, being K-poor and Al-rich, and containing euhedral hornblende phenocrysts. Overall compositions suggest a notably water-rich magma source, evolving through high levels of fractionation and subsequent degassing to produce highly porphyritic dome-forming andesites. The ultimate causes of water-rich magmas at this point in the arc remain unclear.
author	Watt,Sebastian F.L Pyle,David M Mather,Tamsin A
author_facet	Watt,Sebastian F.L Pyle,David M Mather,Tamsin A
author_sort	Watt,Sebastian F.L
title	Geology, petrology and geochemistry of the dome complex of Huequi volcano, southern Chile
title_short	Geology, petrology and geochemistry of the dome complex of Huequi volcano, southern Chile
title_full	Geology, petrology and geochemistry of the dome complex of Huequi volcano, southern Chile
title_fullStr	Geology, petrology and geochemistry of the dome complex of Huequi volcano, southern Chile
title_full_unstemmed	Geology, petrology and geochemistry of the dome complex of Huequi volcano, southern Chile
title_sort	geology, petrology and geochemistry of the dome complex of huequi volcano, southern chile
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062011000200005
work_keys_str_mv	AT wattsebastianfl geologypetrologyandgeochemistryofthedomecomplexofhuequivolcanosouthernchile AT pyledavidm geologypetrologyandgeochemistryofthedomecomplexofhuequivolcanosouthernchile AT mathertamsina geologypetrologyandgeochemistryofthedomecomplexofhuequivolcanosouthernchile
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Geology, petrology and geochemistry of the dome complex of Huequi volcano, southern Chile

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