Home > Research > Publications & Outputs > The evolution of Volcan Nevados de Chillan, Chile.
View graph of relations

The evolution of Volcan Nevados de Chillan, Chile.

Research output: Contribution to Journal/MagazineJournal article

Published

Standard

The evolution of Volcan Nevados de Chillan, Chile. / Dixon, Hugh J.; Murphy, Mick D.; Sparks, R. Steve J. et al.
In: Revista Geologica de Chile, Vol. 26, No. 2, 12.1999, p. 227-253.

Research output: Contribution to Journal/MagazineJournal article

Harvard

Dixon, HJ, Murphy, MD, Sparks, RSJ, Chaves, R, Naranjo, JA, Dunkley, PN, Young, SR, Gilbert, JS & Pringle, MR 1999, 'The evolution of Volcan Nevados de Chillan, Chile.', Revista Geologica de Chile, vol. 26, no. 2, pp. 227-253. <http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02081999000200006&lng=en&nrm=iso&tlng=en>

APA

Dixon, H. J., Murphy, M. D., Sparks, R. S. J., Chaves, R., Naranjo, J. A., Dunkley, P. N., Young, S. R., Gilbert, J. S., & Pringle, M. R. (1999). The evolution of Volcan Nevados de Chillan, Chile. Revista Geologica de Chile, 26(2), 227-253. http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02081999000200006&lng=en&nrm=iso&tlng=en

Vancouver

Dixon HJ, Murphy MD, Sparks RSJ, Chaves R, Naranjo JA, Dunkley PN et al. The evolution of Volcan Nevados de Chillan, Chile. Revista Geologica de Chile. 1999 Dec;26(2):227-253.

Author

Dixon, Hugh J. ; Murphy, Mick D. ; Sparks, R. Steve J. et al. / The evolution of Volcan Nevados de Chillan, Chile. In: Revista Geologica de Chile. 1999 ; Vol. 26, No. 2. pp. 227-253.

Bibtex

@article{4ac715ffbbd644a78c0b4a52b74fee95,
title = "The evolution of Volcan Nevados de Chillan, Chile.",
abstract = "Nevados de Chill{\'a}n volcano is a large composite stratovolcanic complex in the Southern Volcanic Zone of the Chilean Andes. It is one of the highest-risk volcanoes in Chile due to high levels of historic activity and rapid development of economic activity in the area. High precision 40Ar/39Ar and 14C geochronology, geochemistry and petrology have been employed in addition to photogeology and field mapping to elucidate the evolution of this volcano and assess its hazards. Nevados de Chill{\'a}n has been active since at least 640 ka when a large group of subglacial andesite flows were erupted. Since 100 ka, sequences of andesite and dacite lavas have been erupted into both subaerial and subglacial environments. Ignimbrites were erupted at around 40 ka and may have been associated with caldera collapses. Two separate eruptive centres have evolved since 40 ka: the Cerro Blanco and Las Termas subcomplexes. The two centres are 6 km apart, yet have contemporaneously erupted geochemically distinct magmas. Subglacial lavas have been identified on the high flanks of the volcano and 40Ar/39Ar dating has confirmed their eruption during recent glaciations (isotope stages 4 and 2). Tephra fall deposits have been dated by 14C analysis of interstratified organic material and indicate that no proximal tephra fallout deposits older than 9 ka remain. Tephra dispersal indicates that Holocene activity has involved vulcanian to subplinian eruptions. At least, 3 pyroclastic flow eruptions have occurred during the Holocene and lahar deposits are common in the valleys around the volcano. Historically, the Santa Gertrudis vent erupted during 1861-1865 and the dacite lava cone complexes Nuevo and Arrau were constructed during 1906-1943 and 1973-1986, respectively. Historic records indicate that lahars and landslides are major hazards to economic developments on the lower flanks and valleys",
keywords = "Subglacial volcanism, Volcanic hazards, 40Ar/39Ar, Geochronology, Southern Volcanic Zone, Nevados de Chill{\'a}n, Andes.",
author = "Dixon, {Hugh J.} and Murphy, {Mick D.} and Sparks, {R. Steve J.} and Rodrigo Chaves and Naranjo, {Jose A.} and Dunkley, {Peter N.} and Young, {Simon R.} and Gilbert, {Jennie S.} and Pringle, {Malcolm R.}",
year = "1999",
month = dec,
language = "English",
volume = "26",
pages = "227--253",
journal = "Revista Geologica de Chile",
issn = "0716-0208",
publisher = "Servicio Nacional de Geologia y Mineria",
number = "2",

}

RIS

TY - JOUR

T1 - The evolution of Volcan Nevados de Chillan, Chile.

AU - Dixon, Hugh J.

AU - Murphy, Mick D.

AU - Sparks, R. Steve J.

AU - Chaves, Rodrigo

AU - Naranjo, Jose A.

AU - Dunkley, Peter N.

AU - Young, Simon R.

AU - Gilbert, Jennie S.

AU - Pringle, Malcolm R.

PY - 1999/12

Y1 - 1999/12

N2 - Nevados de Chillán volcano is a large composite stratovolcanic complex in the Southern Volcanic Zone of the Chilean Andes. It is one of the highest-risk volcanoes in Chile due to high levels of historic activity and rapid development of economic activity in the area. High precision 40Ar/39Ar and 14C geochronology, geochemistry and petrology have been employed in addition to photogeology and field mapping to elucidate the evolution of this volcano and assess its hazards. Nevados de Chillán has been active since at least 640 ka when a large group of subglacial andesite flows were erupted. Since 100 ka, sequences of andesite and dacite lavas have been erupted into both subaerial and subglacial environments. Ignimbrites were erupted at around 40 ka and may have been associated with caldera collapses. Two separate eruptive centres have evolved since 40 ka: the Cerro Blanco and Las Termas subcomplexes. The two centres are 6 km apart, yet have contemporaneously erupted geochemically distinct magmas. Subglacial lavas have been identified on the high flanks of the volcano and 40Ar/39Ar dating has confirmed their eruption during recent glaciations (isotope stages 4 and 2). Tephra fall deposits have been dated by 14C analysis of interstratified organic material and indicate that no proximal tephra fallout deposits older than 9 ka remain. Tephra dispersal indicates that Holocene activity has involved vulcanian to subplinian eruptions. At least, 3 pyroclastic flow eruptions have occurred during the Holocene and lahar deposits are common in the valleys around the volcano. Historically, the Santa Gertrudis vent erupted during 1861-1865 and the dacite lava cone complexes Nuevo and Arrau were constructed during 1906-1943 and 1973-1986, respectively. Historic records indicate that lahars and landslides are major hazards to economic developments on the lower flanks and valleys

AB - Nevados de Chillán volcano is a large composite stratovolcanic complex in the Southern Volcanic Zone of the Chilean Andes. It is one of the highest-risk volcanoes in Chile due to high levels of historic activity and rapid development of economic activity in the area. High precision 40Ar/39Ar and 14C geochronology, geochemistry and petrology have been employed in addition to photogeology and field mapping to elucidate the evolution of this volcano and assess its hazards. Nevados de Chillán has been active since at least 640 ka when a large group of subglacial andesite flows were erupted. Since 100 ka, sequences of andesite and dacite lavas have been erupted into both subaerial and subglacial environments. Ignimbrites were erupted at around 40 ka and may have been associated with caldera collapses. Two separate eruptive centres have evolved since 40 ka: the Cerro Blanco and Las Termas subcomplexes. The two centres are 6 km apart, yet have contemporaneously erupted geochemically distinct magmas. Subglacial lavas have been identified on the high flanks of the volcano and 40Ar/39Ar dating has confirmed their eruption during recent glaciations (isotope stages 4 and 2). Tephra fall deposits have been dated by 14C analysis of interstratified organic material and indicate that no proximal tephra fallout deposits older than 9 ka remain. Tephra dispersal indicates that Holocene activity has involved vulcanian to subplinian eruptions. At least, 3 pyroclastic flow eruptions have occurred during the Holocene and lahar deposits are common in the valleys around the volcano. Historically, the Santa Gertrudis vent erupted during 1861-1865 and the dacite lava cone complexes Nuevo and Arrau were constructed during 1906-1943 and 1973-1986, respectively. Historic records indicate that lahars and landslides are major hazards to economic developments on the lower flanks and valleys

KW - Subglacial volcanism

KW - Volcanic hazards

KW - 40Ar/39Ar

KW - Geochronology

KW - Southern Volcanic Zone

KW - Nevados de Chillán

KW - Andes.

M3 - Journal article

VL - 26

SP - 227

EP - 253

JO - Revista Geologica de Chile

JF - Revista Geologica de Chile

SN - 0716-0208

IS - 2

ER -