Melt inclusion constraints on petrogenesis of the 2014–2015 Holuhraun eruption, Iceland
Publisher's version (útgefin grein) The 2014–2015 Holuhraun eruption, on the Bárðarbunga volcanic system in central Iceland, was one of the best-monitored basaltic fissure eruptions that has ever occurred, and presents a unique opportunity to link petrological and geochemical data with geophysi...
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Online Access: | https://hdl.handle.net/20.500.11815/892 https://doi.org/10.1007/s00410-017-1435-0 |
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ftopinvisindi:oai:opinvisindi.is:20.500.11815/892 2023-05-15T16:47:41+02:00 Melt inclusion constraints on petrogenesis of the 2014–2015 Holuhraun eruption, Iceland Hartley, Margaret E. Bali, Eniko Maclennan, John Neave, David A. Halldórsson, Sæmundur Ari Jarðvísindastofnun (HÍ) Institute of Earth Sciences (UI) Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) Háskóli Íslands University of Iceland 2018-01-12 https://hdl.handle.net/20.500.11815/892 https://doi.org/10.1007/s00410-017-1435-0 en eng Springer Nature Contributions to Mineralogy and Petrology;173(2) Hartley, M. E., Bali, E., Maclennan, J., Neave, D. A., & Halldórsson, S. A. (2018). Melt inclusion constraints on petrogenesis of the 2014–2015 Holuhraun eruption, Iceland. Contributions to Mineralogy and Petrology, 173(2), 10. doi:10.1007/s00410-017-1435-0 0010-7999 1432-0967 (eISSN) https://hdl.handle.net/20.500.11815/892 Contributions to Mineralogy and Petrology doi:10.1007/s00410-017-1435-0 info:eu-repo/semantics/openAccess Iceland Holuhraun Melt inclusions Crystallization Melt barometry Eldgos Hraunrennsli Kristallafræði info:eu-repo/semantics/article 2018 ftopinvisindi https://doi.org/20.500.11815/892 https://doi.org/10.1007/s00410-017-1435-0 2022-11-18T06:51:40Z Publisher's version (útgefin grein) The 2014–2015 Holuhraun eruption, on the Bárðarbunga volcanic system in central Iceland, was one of the best-monitored basaltic fissure eruptions that has ever occurred, and presents a unique opportunity to link petrological and geochemical data with geophysical observations during a major rifting episode. We present major and trace element analyses of melt inclusions and matrix glasses from a suite of ten samples collected over the course of the Holuhraun eruption. The diversity of trace element ratios such as La/Yb in Holuhraun melt inclusions reveals that the magma evolved via concurrent mixing and crystallization of diverse primary melts in the mid-crust. Using olivine–plagioclase–augite–melt (OPAM) barometry, we calculate that the Holuhraun carrier melt equilibrated at 2.1±0.7 kbar (7.5±2.5 km), which is in agreement with the depths of earthquakes (6±1 km) between Bárðarbunga central volcano and the eruption site in the days preceding eruption onset. Using the same approach, melt inclusions equilibrated at pressures between 0.5 and 8.0 kbar, with the most probable pressure being 3.2 kbar. Diffusion chronometry reveals minimum residence timescales of 1–12 days for melt inclusionbearing macrocrysts in the Holuhraun carrier melt. By combining timescales of diffusive dehydration of melt inclusions with the calculated pressure of H2O saturation for the Holuhraun magma, we calculate indicative magma ascent rates of 0.12–0.29 m s−1. Our petrological and geochemical data are consistent with lateral magma transport from Bárðarbunga volcano to the eruption site in a shallow- to mid-crustal dyke, as has been suggested on the basis of seismic and geodetic datasets. This result is a significant step forward in reconciling petrological and geophysical interpretations of magma transport during volcano-tectonic episodes, and provides a critical framework for the interpretation of premonitory seismic and geodetic data in volcanically active regions. This work was supported by Natural ... Article in Journal/Newspaper Iceland Opin vísindi (Iceland) Holuhraun ENVELOPE(-16.831,-16.831,64.852,64.852) Contributions to Mineralogy and Petrology 173 2 |
institution |
Open Polar |
collection |
Opin vísindi (Iceland) |
op_collection_id |
ftopinvisindi |
language |
English |
topic |
Iceland Holuhraun Melt inclusions Crystallization Melt barometry Eldgos Hraunrennsli Kristallafræði |
spellingShingle |
Iceland Holuhraun Melt inclusions Crystallization Melt barometry Eldgos Hraunrennsli Kristallafræði Hartley, Margaret E. Bali, Eniko Maclennan, John Neave, David A. Halldórsson, Sæmundur Ari Melt inclusion constraints on petrogenesis of the 2014–2015 Holuhraun eruption, Iceland |
topic_facet |
Iceland Holuhraun Melt inclusions Crystallization Melt barometry Eldgos Hraunrennsli Kristallafræði |
description |
Publisher's version (útgefin grein) The 2014–2015 Holuhraun eruption, on the Bárðarbunga volcanic system in central Iceland, was one of the best-monitored basaltic fissure eruptions that has ever occurred, and presents a unique opportunity to link petrological and geochemical data with geophysical observations during a major rifting episode. We present major and trace element analyses of melt inclusions and matrix glasses from a suite of ten samples collected over the course of the Holuhraun eruption. The diversity of trace element ratios such as La/Yb in Holuhraun melt inclusions reveals that the magma evolved via concurrent mixing and crystallization of diverse primary melts in the mid-crust. Using olivine–plagioclase–augite–melt (OPAM) barometry, we calculate that the Holuhraun carrier melt equilibrated at 2.1±0.7 kbar (7.5±2.5 km), which is in agreement with the depths of earthquakes (6±1 km) between Bárðarbunga central volcano and the eruption site in the days preceding eruption onset. Using the same approach, melt inclusions equilibrated at pressures between 0.5 and 8.0 kbar, with the most probable pressure being 3.2 kbar. Diffusion chronometry reveals minimum residence timescales of 1–12 days for melt inclusionbearing macrocrysts in the Holuhraun carrier melt. By combining timescales of diffusive dehydration of melt inclusions with the calculated pressure of H2O saturation for the Holuhraun magma, we calculate indicative magma ascent rates of 0.12–0.29 m s−1. Our petrological and geochemical data are consistent with lateral magma transport from Bárðarbunga volcano to the eruption site in a shallow- to mid-crustal dyke, as has been suggested on the basis of seismic and geodetic datasets. This result is a significant step forward in reconciling petrological and geophysical interpretations of magma transport during volcano-tectonic episodes, and provides a critical framework for the interpretation of premonitory seismic and geodetic data in volcanically active regions. This work was supported by Natural ... |
author2 |
Jarðvísindastofnun (HÍ) Institute of Earth Sciences (UI) Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) Háskóli Íslands University of Iceland |
format |
Article in Journal/Newspaper |
author |
Hartley, Margaret E. Bali, Eniko Maclennan, John Neave, David A. Halldórsson, Sæmundur Ari |
author_facet |
Hartley, Margaret E. Bali, Eniko Maclennan, John Neave, David A. Halldórsson, Sæmundur Ari |
author_sort |
Hartley, Margaret E. |
title |
Melt inclusion constraints on petrogenesis of the 2014–2015 Holuhraun eruption, Iceland |
title_short |
Melt inclusion constraints on petrogenesis of the 2014–2015 Holuhraun eruption, Iceland |
title_full |
Melt inclusion constraints on petrogenesis of the 2014–2015 Holuhraun eruption, Iceland |
title_fullStr |
Melt inclusion constraints on petrogenesis of the 2014–2015 Holuhraun eruption, Iceland |
title_full_unstemmed |
Melt inclusion constraints on petrogenesis of the 2014–2015 Holuhraun eruption, Iceland |
title_sort |
melt inclusion constraints on petrogenesis of the 2014–2015 holuhraun eruption, iceland |
publisher |
Springer Nature |
publishDate |
2018 |
url |
https://hdl.handle.net/20.500.11815/892 https://doi.org/10.1007/s00410-017-1435-0 |
long_lat |
ENVELOPE(-16.831,-16.831,64.852,64.852) |
geographic |
Holuhraun |
geographic_facet |
Holuhraun |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
Contributions to Mineralogy and Petrology;173(2) Hartley, M. E., Bali, E., Maclennan, J., Neave, D. A., & Halldórsson, S. A. (2018). Melt inclusion constraints on petrogenesis of the 2014–2015 Holuhraun eruption, Iceland. Contributions to Mineralogy and Petrology, 173(2), 10. doi:10.1007/s00410-017-1435-0 0010-7999 1432-0967 (eISSN) https://hdl.handle.net/20.500.11815/892 Contributions to Mineralogy and Petrology doi:10.1007/s00410-017-1435-0 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.11815/892 https://doi.org/10.1007/s00410-017-1435-0 |
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Contributions to Mineralogy and Petrology |
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173 |
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2 |
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1766037774679408640 |