Melt movement through the Icelandic crust
We use both seismology and geobarometry to investigate the movement of melt through the volcanic crust of Iceland. We have captured melt in the act of moving within or through a series of sills ranging from the upper mantle to the shallow crust by the clusters of small earthquakes it produces as it...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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crroyalsociety:10.1098/rsta.2018.0010 2024-06-23T07:54:02+00:00 Melt movement through the Icelandic crust White, Robert S. Edmonds, Marie Maclennan, John Greenfield, Tim Agustsdottir, Thorbjorg Natural Environment Research Council European Community's Seventh Framework Programme 2019 http://dx.doi.org/10.1098/rsta.2018.0010 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2018.0010 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2018.0010 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 377, issue 2139, page 20180010 ISSN 1364-503X 1471-2962 journal-article 2019 crroyalsociety https://doi.org/10.1098/rsta.2018.0010 2024-06-04T06:22:58Z We use both seismology and geobarometry to investigate the movement of melt through the volcanic crust of Iceland. We have captured melt in the act of moving within or through a series of sills ranging from the upper mantle to the shallow crust by the clusters of small earthquakes it produces as it forces its way upward. The melt is injected not just beneath the central volcanoes, but also at discrete locations along the rift zones and above the centre of the underlying mantle plume. We suggest that the high strain rates required to produce seismicity at depths of 10–25 km in a normally ductile part of the Icelandic crust are linked to the exsolution of carbon dioxide from the basaltic melts. The seismicity and geobarometry provide complementary information on the way that the melt moves through the crust, stalling and fractionating, and often freezing in one or more melt lenses on its way upwards: the seismicity shows what is happening instantaneously today, while the geobarometry gives constraints averaged over longer time scales on the depths of residence in the crust of melts prior to their eruption. This article is part of the Theo Murphy meeting issue ‘Magma reservoir architecture and dynamics'. Article in Journal/Newspaper Iceland The Royal Society Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 377 2139 20180010 |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
We use both seismology and geobarometry to investigate the movement of melt through the volcanic crust of Iceland. We have captured melt in the act of moving within or through a series of sills ranging from the upper mantle to the shallow crust by the clusters of small earthquakes it produces as it forces its way upward. The melt is injected not just beneath the central volcanoes, but also at discrete locations along the rift zones and above the centre of the underlying mantle plume. We suggest that the high strain rates required to produce seismicity at depths of 10–25 km in a normally ductile part of the Icelandic crust are linked to the exsolution of carbon dioxide from the basaltic melts. The seismicity and geobarometry provide complementary information on the way that the melt moves through the crust, stalling and fractionating, and often freezing in one or more melt lenses on its way upwards: the seismicity shows what is happening instantaneously today, while the geobarometry gives constraints averaged over longer time scales on the depths of residence in the crust of melts prior to their eruption. This article is part of the Theo Murphy meeting issue ‘Magma reservoir architecture and dynamics'. |
author2 |
Natural Environment Research Council European Community's Seventh Framework Programme |
format |
Article in Journal/Newspaper |
author |
White, Robert S. Edmonds, Marie Maclennan, John Greenfield, Tim Agustsdottir, Thorbjorg |
spellingShingle |
White, Robert S. Edmonds, Marie Maclennan, John Greenfield, Tim Agustsdottir, Thorbjorg Melt movement through the Icelandic crust |
author_facet |
White, Robert S. Edmonds, Marie Maclennan, John Greenfield, Tim Agustsdottir, Thorbjorg |
author_sort |
White, Robert S. |
title |
Melt movement through the Icelandic crust |
title_short |
Melt movement through the Icelandic crust |
title_full |
Melt movement through the Icelandic crust |
title_fullStr |
Melt movement through the Icelandic crust |
title_full_unstemmed |
Melt movement through the Icelandic crust |
title_sort |
melt movement through the icelandic crust |
publisher |
The Royal Society |
publishDate |
2019 |
url |
http://dx.doi.org/10.1098/rsta.2018.0010 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2018.0010 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2018.0010 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 377, issue 2139, page 20180010 ISSN 1364-503X 1471-2962 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsta.2018.0010 |
container_title |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
377 |
container_issue |
2139 |
container_start_page |
20180010 |
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1802645979941306368 |