Petrology and geochemistry of the 2014-2015 Holuhraun eruption, central Iceland: compositional and mineralogical characteristics, temporal variability and magma storage
The 2014-2015 Holuhraun fissure eruption provided a rare opportunity to study in detail the magmatic processes and magma plumbing system dynamics during a six-month-long, moderate- to large-volume basaltic fissure eruption. In this contribution, we present a comprehensive dataset, including major an...
Published in: | Contributions to Mineralogy and Petrology |
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2018
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Online Access: | https://research.manchester.ac.uk/en/publications/8a23bdd8-e442-4755-9516-fe065a765edb https://doi.org/10.1007/s00410-018-1487-9 https://pure.manchester.ac.uk/ws/files/74103086/Holuhraun_Part1_revised_Clean.docx |
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ftumanchesterpub:oai:pure.atira.dk:publications/8a23bdd8-e442-4755-9516-fe065a765edb 2023-11-12T04:19:13+01:00 Petrology and geochemistry of the 2014-2015 Holuhraun eruption, central Iceland: compositional and mineralogical characteristics, temporal variability and magma storage Halldórsson, Saemundur A. Bali, Enikő Hartley, Margaret E. Neave, David Peate, David W. Guðfinnsson, Guðmundur H. Bindeman, Ilya Whitehouse, Martin J. Riishuus, Morten S. Pedersen, Gro B. M. Jakobsson, Sigurður Askew, Rob Gallagher, Catherine R. Guðmundsdóttir, Esther R. Gudnason, Jónas Moreland, William M. Óskarsson, Birgir V. Nikkola, Paavo Reynolds, Hannah I. Schmith, Johanne Thordarson, Thorvaldur 2018-08 application/vnd.openxmlformats-officedocument.wordprocessingml.document https://research.manchester.ac.uk/en/publications/8a23bdd8-e442-4755-9516-fe065a765edb https://doi.org/10.1007/s00410-018-1487-9 https://pure.manchester.ac.uk/ws/files/74103086/Holuhraun_Part1_revised_Clean.docx eng eng info:eu-repo/semantics/openAccess Halldórsson , S A , Bali , E , Hartley , M E , Neave , D , Peate , D W , Guðfinnsson , G H , Bindeman , I , Whitehouse , M J , Riishuus , M S , Pedersen , G B M , Jakobsson , S , Askew , R , Gallagher , C R , Guðmundsdóttir , E R , Gudnason , J , Moreland , W M , Óskarsson , B V , Nikkola , P , Reynolds , H I , Schmith , J & Thordarson , T 2018 , ' Petrology and geochemistry of the 2014-2015 Holuhraun eruption, central Iceland: compositional and mineralogical characteristics, temporal variability and magma storage ' , Contributions to Mineralogy and Petrology , vol. 173 , no. 64 . https://doi.org/10.1007/s00410-018-1487-9 article 2018 ftumanchesterpub https://doi.org/10.1007/s00410-018-1487-9 2023-10-30T09:12:20Z The 2014-2015 Holuhraun fissure eruption provided a rare opportunity to study in detail the magmatic processes and magma plumbing system dynamics during a six-month-long, moderate- to large-volume basaltic fissure eruption. In this contribution, we present a comprehensive dataset, including major and trace elements of whole-rock and glassy tephra samples, mineral chemistry, and radiogenic and oxygen isotope analyses from an extensive set of samples (n=62) that were collected systematically in several field campaigns throughout the entire eruptive period. We also present the first detailed chemical and isotopic characterization of magmatic sulfides from Iceland. In conjunction with a unique set of geophysical data, our approach provides a detailed temporal and spatial resolution of magmatic processes before and during this eruption. The 2014-15 Holuhraun magma is compositionally indistinguishable from recent basalts erupted from the Bárðarbunga volcanic system, consistent with seismic observations for magma ascent close by the Bárðarbunga central volcano, followed by dyke propagation to the Holuhraun eruption site. Whole-rock elemental and isotopic compositions are remarkably constant throughout the eruption. Moreover, the inferred depth of the magma reservoir tapped during the eruption is consistently 8±5 km, in agreement with geodetic observations and melt inclusion entrapment pressures, but inconsistent with vertically extensive multi-tiered magma storage prior to eruption. The near constancy in the chemical and isotopic composition of the lava is consistent with efficient homogenization of mantle-derived compositional variability. In contrast, occurrence of different mineral populations, including sulfide globules, which display significant compositional variability, require a more complex pre-eruptive magmatic history. This may include sampling of heterogeneous mantle melts that mixed, crystallized and finally homogenized at mid- to lower-crustal conditions. Article in Journal/Newspaper Iceland The University of Manchester: Research Explorer Contributions to Mineralogy and Petrology 173 8 |
institution |
Open Polar |
collection |
The University of Manchester: Research Explorer |
op_collection_id |
ftumanchesterpub |
language |
English |
description |
The 2014-2015 Holuhraun fissure eruption provided a rare opportunity to study in detail the magmatic processes and magma plumbing system dynamics during a six-month-long, moderate- to large-volume basaltic fissure eruption. In this contribution, we present a comprehensive dataset, including major and trace elements of whole-rock and glassy tephra samples, mineral chemistry, and radiogenic and oxygen isotope analyses from an extensive set of samples (n=62) that were collected systematically in several field campaigns throughout the entire eruptive period. We also present the first detailed chemical and isotopic characterization of magmatic sulfides from Iceland. In conjunction with a unique set of geophysical data, our approach provides a detailed temporal and spatial resolution of magmatic processes before and during this eruption. The 2014-15 Holuhraun magma is compositionally indistinguishable from recent basalts erupted from the Bárðarbunga volcanic system, consistent with seismic observations for magma ascent close by the Bárðarbunga central volcano, followed by dyke propagation to the Holuhraun eruption site. Whole-rock elemental and isotopic compositions are remarkably constant throughout the eruption. Moreover, the inferred depth of the magma reservoir tapped during the eruption is consistently 8±5 km, in agreement with geodetic observations and melt inclusion entrapment pressures, but inconsistent with vertically extensive multi-tiered magma storage prior to eruption. The near constancy in the chemical and isotopic composition of the lava is consistent with efficient homogenization of mantle-derived compositional variability. In contrast, occurrence of different mineral populations, including sulfide globules, which display significant compositional variability, require a more complex pre-eruptive magmatic history. This may include sampling of heterogeneous mantle melts that mixed, crystallized and finally homogenized at mid- to lower-crustal conditions. |
format |
Article in Journal/Newspaper |
author |
Halldórsson, Saemundur A. Bali, Enikő Hartley, Margaret E. Neave, David Peate, David W. Guðfinnsson, Guðmundur H. Bindeman, Ilya Whitehouse, Martin J. Riishuus, Morten S. Pedersen, Gro B. M. Jakobsson, Sigurður Askew, Rob Gallagher, Catherine R. Guðmundsdóttir, Esther R. Gudnason, Jónas Moreland, William M. Óskarsson, Birgir V. Nikkola, Paavo Reynolds, Hannah I. Schmith, Johanne Thordarson, Thorvaldur |
spellingShingle |
Halldórsson, Saemundur A. Bali, Enikő Hartley, Margaret E. Neave, David Peate, David W. Guðfinnsson, Guðmundur H. Bindeman, Ilya Whitehouse, Martin J. Riishuus, Morten S. Pedersen, Gro B. M. Jakobsson, Sigurður Askew, Rob Gallagher, Catherine R. Guðmundsdóttir, Esther R. Gudnason, Jónas Moreland, William M. Óskarsson, Birgir V. Nikkola, Paavo Reynolds, Hannah I. Schmith, Johanne Thordarson, Thorvaldur Petrology and geochemistry of the 2014-2015 Holuhraun eruption, central Iceland: compositional and mineralogical characteristics, temporal variability and magma storage |
author_facet |
Halldórsson, Saemundur A. Bali, Enikő Hartley, Margaret E. Neave, David Peate, David W. Guðfinnsson, Guðmundur H. Bindeman, Ilya Whitehouse, Martin J. Riishuus, Morten S. Pedersen, Gro B. M. Jakobsson, Sigurður Askew, Rob Gallagher, Catherine R. Guðmundsdóttir, Esther R. Gudnason, Jónas Moreland, William M. Óskarsson, Birgir V. Nikkola, Paavo Reynolds, Hannah I. Schmith, Johanne Thordarson, Thorvaldur |
author_sort |
Halldórsson, Saemundur A. |
title |
Petrology and geochemistry of the 2014-2015 Holuhraun eruption, central Iceland: compositional and mineralogical characteristics, temporal variability and magma storage |
title_short |
Petrology and geochemistry of the 2014-2015 Holuhraun eruption, central Iceland: compositional and mineralogical characteristics, temporal variability and magma storage |
title_full |
Petrology and geochemistry of the 2014-2015 Holuhraun eruption, central Iceland: compositional and mineralogical characteristics, temporal variability and magma storage |
title_fullStr |
Petrology and geochemistry of the 2014-2015 Holuhraun eruption, central Iceland: compositional and mineralogical characteristics, temporal variability and magma storage |
title_full_unstemmed |
Petrology and geochemistry of the 2014-2015 Holuhraun eruption, central Iceland: compositional and mineralogical characteristics, temporal variability and magma storage |
title_sort |
petrology and geochemistry of the 2014-2015 holuhraun eruption, central iceland: compositional and mineralogical characteristics, temporal variability and magma storage |
publishDate |
2018 |
url |
https://research.manchester.ac.uk/en/publications/8a23bdd8-e442-4755-9516-fe065a765edb https://doi.org/10.1007/s00410-018-1487-9 https://pure.manchester.ac.uk/ws/files/74103086/Holuhraun_Part1_revised_Clean.docx |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Halldórsson , S A , Bali , E , Hartley , M E , Neave , D , Peate , D W , Guðfinnsson , G H , Bindeman , I , Whitehouse , M J , Riishuus , M S , Pedersen , G B M , Jakobsson , S , Askew , R , Gallagher , C R , Guðmundsdóttir , E R , Gudnason , J , Moreland , W M , Óskarsson , B V , Nikkola , P , Reynolds , H I , Schmith , J & Thordarson , T 2018 , ' Petrology and geochemistry of the 2014-2015 Holuhraun eruption, central Iceland: compositional and mineralogical characteristics, temporal variability and magma storage ' , Contributions to Mineralogy and Petrology , vol. 173 , no. 64 . https://doi.org/10.1007/s00410-018-1487-9 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s00410-018-1487-9 |
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Contributions to Mineralogy and Petrology |
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173 |
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