The 2001-2004 dome-forming eruption of Shiveluch volcano, Kamchatka: Observation, petrological investigation and numerical modelling
There have been three episodes of lava dome growth at Shiveluch volcano, Kamchatka since the Plinian explosive eruption in 1964. The episodes in 1980-1981, 1993-1995 and 2001-2004 have discharged at least 0.27 km 3 of silicic andesite magma. A time-averaged mean extrusion rate of 0.2 m 3/s is thus e...
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ftuloxford:oai:ora.ox.ac.uk:uuid:7d5c0ec6-485a-4d12-9777-6a61b016c9df 2023-05-15T16:59:06+02:00 The 2001-2004 dome-forming eruption of Shiveluch volcano, Kamchatka: Observation, petrological investigation and numerical modelling Dirksen, O Humphreys, M Pletchov, P Melnik, O Demyanchuk, Y Sparks, R Mahony, S 2016-07-28 https://doi.org/10.1016/j.jvolgcores.2006.03.029 https://ora.ox.ac.uk/objects/uuid:7d5c0ec6-485a-4d12-9777-6a61b016c9df eng eng doi:10.1016/j.jvolgcores.2006.03.029 https://ora.ox.ac.uk/objects/uuid:7d5c0ec6-485a-4d12-9777-6a61b016c9df https://doi.org/10.1016/j.jvolgcores.2006.03.029 info:eu-repo/semantics/embargoedAccess Journal article 2016 ftuloxford https://doi.org/10.1016/j.jvolgcores.2006.03.029 2022-06-28T20:16:26Z There have been three episodes of lava dome growth at Shiveluch volcano, Kamchatka since the Plinian explosive eruption in 1964. The episodes in 1980-1981, 1993-1995 and 2001-2004 have discharged at least 0.27 km 3 of silicic andesite magma. A time-averaged mean extrusion rate of 0.2 m 3/s is thus estimated for the last 40 years. Here the 2001-2004 activity is described and compared with the earlier episodes. The recent activity involved three pulses in extrusion rate and a transition to ongoing lava extrusion. Estimated magma temperatures are in the range 830 to 900 °C, with 850 °C as the best estimate, using the plagioclase-amphibole phenocryst assemblage and Fe-Ti oxides. Melt inclusions in amphibole and plagioclase have maximum water contents of 5.1 wt.%, implying a minimum pressure of ∼ 155 MPa for water-saturated conditions. The magma chamber depth is estimated to be about 5-6 km or more, a result consistent with geophysical data. The thicknesses of opx-mt-amph reaction rims on olivine xenocrysts are used to estimate the residence time of olivine crystals in the shallow chamber in the range 2 months to 4 years, suggesting replenishment of deeper magma into the shallow chamber contemporaneous with eruption. The absence of decompression-driven breakdown rims around amphiboles indicates ascent times of less than 7 days. Volcanological observations of the start of the 2001-2004 episode suggest approximately 16 days for the ascent time and a conduit equivalent to a cylinder of diameter approximately 53-71 m. Application of a conduit flow model indicates that the magma chamber was replenished during the 2001-2004 eruption, consistent with the results of olivine reaction rims, and that the chamber has an estimated volume of order 7 km 3. © 2006 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Kamchatka ORA - Oxford University Research Archive |
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Open Polar |
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ORA - Oxford University Research Archive |
op_collection_id |
ftuloxford |
language |
English |
description |
There have been three episodes of lava dome growth at Shiveluch volcano, Kamchatka since the Plinian explosive eruption in 1964. The episodes in 1980-1981, 1993-1995 and 2001-2004 have discharged at least 0.27 km 3 of silicic andesite magma. A time-averaged mean extrusion rate of 0.2 m 3/s is thus estimated for the last 40 years. Here the 2001-2004 activity is described and compared with the earlier episodes. The recent activity involved three pulses in extrusion rate and a transition to ongoing lava extrusion. Estimated magma temperatures are in the range 830 to 900 °C, with 850 °C as the best estimate, using the plagioclase-amphibole phenocryst assemblage and Fe-Ti oxides. Melt inclusions in amphibole and plagioclase have maximum water contents of 5.1 wt.%, implying a minimum pressure of ∼ 155 MPa for water-saturated conditions. The magma chamber depth is estimated to be about 5-6 km or more, a result consistent with geophysical data. The thicknesses of opx-mt-amph reaction rims on olivine xenocrysts are used to estimate the residence time of olivine crystals in the shallow chamber in the range 2 months to 4 years, suggesting replenishment of deeper magma into the shallow chamber contemporaneous with eruption. The absence of decompression-driven breakdown rims around amphiboles indicates ascent times of less than 7 days. Volcanological observations of the start of the 2001-2004 episode suggest approximately 16 days for the ascent time and a conduit equivalent to a cylinder of diameter approximately 53-71 m. Application of a conduit flow model indicates that the magma chamber was replenished during the 2001-2004 eruption, consistent with the results of olivine reaction rims, and that the chamber has an estimated volume of order 7 km 3. © 2006 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Dirksen, O Humphreys, M Pletchov, P Melnik, O Demyanchuk, Y Sparks, R Mahony, S |
spellingShingle |
Dirksen, O Humphreys, M Pletchov, P Melnik, O Demyanchuk, Y Sparks, R Mahony, S The 2001-2004 dome-forming eruption of Shiveluch volcano, Kamchatka: Observation, petrological investigation and numerical modelling |
author_facet |
Dirksen, O Humphreys, M Pletchov, P Melnik, O Demyanchuk, Y Sparks, R Mahony, S |
author_sort |
Dirksen, O |
title |
The 2001-2004 dome-forming eruption of Shiveluch volcano, Kamchatka: Observation, petrological investigation and numerical modelling |
title_short |
The 2001-2004 dome-forming eruption of Shiveluch volcano, Kamchatka: Observation, petrological investigation and numerical modelling |
title_full |
The 2001-2004 dome-forming eruption of Shiveluch volcano, Kamchatka: Observation, petrological investigation and numerical modelling |
title_fullStr |
The 2001-2004 dome-forming eruption of Shiveluch volcano, Kamchatka: Observation, petrological investigation and numerical modelling |
title_full_unstemmed |
The 2001-2004 dome-forming eruption of Shiveluch volcano, Kamchatka: Observation, petrological investigation and numerical modelling |
title_sort |
2001-2004 dome-forming eruption of shiveluch volcano, kamchatka: observation, petrological investigation and numerical modelling |
publishDate |
2016 |
url |
https://doi.org/10.1016/j.jvolgcores.2006.03.029 https://ora.ox.ac.uk/objects/uuid:7d5c0ec6-485a-4d12-9777-6a61b016c9df |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_relation |
doi:10.1016/j.jvolgcores.2006.03.029 https://ora.ox.ac.uk/objects/uuid:7d5c0ec6-485a-4d12-9777-6a61b016c9df https://doi.org/10.1016/j.jvolgcores.2006.03.029 |
op_rights |
info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.1016/j.jvolgcores.2006.03.029 |
_version_ |
1766051294358798336 |