Rheology of phonolitic magmas - the case of the Erebus lava lake
Long-lived active lava lakes are comparatively rare and are typically associated with low-viscosity basaltic magmas. Erebus volcano, Antarctica, is unique today in hosting a phonolitic lava lake. Phonolitic magmas can erupt explosively, as in the 79 CE Plinian eruption of Vesuvius volcano, Italy, an...
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Online Access: | http://hdl.handle.net/11591/200319 https://doi.org/10.1016/j.epsl.2014.11.042 http://www.sciencedirect.com/science/journal/0012821X/321-322 |
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ftuncampaniairis:oai:iris.unicampania.it:11591/200319 2024-04-14T08:03:52+00:00 Rheology of phonolitic magmas - the case of the Erebus lava lake Le Losq, Charles Neuville, Daniel R. MORETTI, Roberto Kyle, Philip R. Oppenheimer, Clive Le Losq, Charle Neuville, Daniel R. Moretti, Roberto Kyle, Philip R. Oppenheimer, Clive 2015 http://hdl.handle.net/11591/200319 https://doi.org/10.1016/j.epsl.2014.11.042 http://www.sciencedirect.com/science/journal/0012821X/321-322 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000349197500007 volume:411 firstpage:53 lastpage:61 numberofpages:9 journal:EARTH AND PLANETARY SCIENCE LETTERS http://hdl.handle.net/11591/200319 doi:10.1016/j.epsl.2014.11.042 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84918805047 http://www.sciencedirect.com/science/journal/0012821X/321-322 Erebus volcano Lava lake Magma convection Rheology Viscosity Geochemistry and Petrology Geophysic Earth and Planetary Sciences (miscellaneous) Space and Planetary Science info:eu-repo/semantics/article 2015 ftuncampaniairis https://doi.org/10.1016/j.epsl.2014.11.042 2024-03-21T16:03:33Z Long-lived active lava lakes are comparatively rare and are typically associated with low-viscosity basaltic magmas. Erebus volcano, Antarctica, is unique today in hosting a phonolitic lava lake. Phonolitic magmas can erupt explosively, as in the 79 CE Plinian eruption of Vesuvius volcano, Italy, and it is therefore important to understand their physical properties. The phonolite at Erebus has slightly higher silica content than that at Vesuvius yet its present activity is predominantly non-explosive. As a contribution to understanding such contrasting eruptive behaviour, we focus on the rheological differences between these comparable magmas. In particular, we evaluate the viscosity of the Erebus phonolite magma by integrating new experimental data within a theoretical and empirical framework. The resulting model enables estimation of the Erebus melt viscosity as a function of temperature, crystal and water concentrations, with an uncertainty of, at most, ±0.45log (Pa s). Using reported ranges for these parameters, we predict that the magma viscosity in the upper region of the plumbing system of Erebus ranges between 105 and 107 Pas. This is substantially higher than has been hitherto considered with significant implications for modelling the dynamics of the lava lake, conduit and magma reservoir system. Our analysis highlights the generic challenges encountered in calculation of magma viscosity and presents an approach that can be applied to other cases. Article in Journal/Newspaper Antarc* Antarctica Università degli Studi della Campania "Luigi Vanvitelli": CINECA IRIS V: Lava Lake ENVELOPE(-128.996,-128.996,55.046,55.046) Lava Lakes ENVELOPE(-130.904,-130.904,56.433,56.433) Earth and Planetary Science Letters 411 53 61 |
institution |
Open Polar |
collection |
Università degli Studi della Campania "Luigi Vanvitelli": CINECA IRIS V: |
op_collection_id |
ftuncampaniairis |
language |
English |
topic |
Erebus volcano Lava lake Magma convection Rheology Viscosity Geochemistry and Petrology Geophysic Earth and Planetary Sciences (miscellaneous) Space and Planetary Science |
spellingShingle |
Erebus volcano Lava lake Magma convection Rheology Viscosity Geochemistry and Petrology Geophysic Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Le Losq, Charles Neuville, Daniel R. MORETTI, Roberto Kyle, Philip R. Oppenheimer, Clive Rheology of phonolitic magmas - the case of the Erebus lava lake |
topic_facet |
Erebus volcano Lava lake Magma convection Rheology Viscosity Geochemistry and Petrology Geophysic Earth and Planetary Sciences (miscellaneous) Space and Planetary Science |
description |
Long-lived active lava lakes are comparatively rare and are typically associated with low-viscosity basaltic magmas. Erebus volcano, Antarctica, is unique today in hosting a phonolitic lava lake. Phonolitic magmas can erupt explosively, as in the 79 CE Plinian eruption of Vesuvius volcano, Italy, and it is therefore important to understand their physical properties. The phonolite at Erebus has slightly higher silica content than that at Vesuvius yet its present activity is predominantly non-explosive. As a contribution to understanding such contrasting eruptive behaviour, we focus on the rheological differences between these comparable magmas. In particular, we evaluate the viscosity of the Erebus phonolite magma by integrating new experimental data within a theoretical and empirical framework. The resulting model enables estimation of the Erebus melt viscosity as a function of temperature, crystal and water concentrations, with an uncertainty of, at most, ±0.45log (Pa s). Using reported ranges for these parameters, we predict that the magma viscosity in the upper region of the plumbing system of Erebus ranges between 105 and 107 Pas. This is substantially higher than has been hitherto considered with significant implications for modelling the dynamics of the lava lake, conduit and magma reservoir system. Our analysis highlights the generic challenges encountered in calculation of magma viscosity and presents an approach that can be applied to other cases. |
author2 |
Le Losq, Charle Neuville, Daniel R. Moretti, Roberto Kyle, Philip R. Oppenheimer, Clive |
format |
Article in Journal/Newspaper |
author |
Le Losq, Charles Neuville, Daniel R. MORETTI, Roberto Kyle, Philip R. Oppenheimer, Clive |
author_facet |
Le Losq, Charles Neuville, Daniel R. MORETTI, Roberto Kyle, Philip R. Oppenheimer, Clive |
author_sort |
Le Losq, Charles |
title |
Rheology of phonolitic magmas - the case of the Erebus lava lake |
title_short |
Rheology of phonolitic magmas - the case of the Erebus lava lake |
title_full |
Rheology of phonolitic magmas - the case of the Erebus lava lake |
title_fullStr |
Rheology of phonolitic magmas - the case of the Erebus lava lake |
title_full_unstemmed |
Rheology of phonolitic magmas - the case of the Erebus lava lake |
title_sort |
rheology of phonolitic magmas - the case of the erebus lava lake |
publishDate |
2015 |
url |
http://hdl.handle.net/11591/200319 https://doi.org/10.1016/j.epsl.2014.11.042 http://www.sciencedirect.com/science/journal/0012821X/321-322 |
long_lat |
ENVELOPE(-128.996,-128.996,55.046,55.046) ENVELOPE(-130.904,-130.904,56.433,56.433) |
geographic |
Lava Lake Lava Lakes |
geographic_facet |
Lava Lake Lava Lakes |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000349197500007 volume:411 firstpage:53 lastpage:61 numberofpages:9 journal:EARTH AND PLANETARY SCIENCE LETTERS http://hdl.handle.net/11591/200319 doi:10.1016/j.epsl.2014.11.042 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84918805047 http://www.sciencedirect.com/science/journal/0012821X/321-322 |
op_doi |
https://doi.org/10.1016/j.epsl.2014.11.042 |
container_title |
Earth and Planetary Science Letters |
container_volume |
411 |
container_start_page |
53 |
op_container_end_page |
61 |
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1796300186635468800 |