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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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6335479/ http://www.ncbi.nlm.nih.gov/pubmed/30966935 https://doi.org/10.1098/rsta.2018.0010 |
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ftpubmed:oai:pubmedcentral.nih.gov:6335479 2023-05-15T16:50:30+02:00 Melt movement through the Icelandic crust White, Robert S. Edmonds, Marie Maclennan, John Greenfield, Tim Agustsdottir, Thorbjorg 2019-02-25 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6335479/ http://www.ncbi.nlm.nih.gov/pubmed/30966935 https://doi.org/10.1098/rsta.2018.0010 en eng The Royal Society Publishing http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6335479/ http://www.ncbi.nlm.nih.gov/pubmed/30966935 http://dx.doi.org/10.1098/rsta.2018.0010 © 2019 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. Articles Text 2019 ftpubmed https://doi.org/10.1098/rsta.2018.0010 2020-03-01T01:13:57Z 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'. Text Iceland PubMed Central (PMC) Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 377 2139 20180010 |
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Articles White, Robert S. Edmonds, Marie Maclennan, John Greenfield, Tim Agustsdottir, Thorbjorg Melt movement through the Icelandic crust |
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Articles |
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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'. |
format |
Text |
author |
White, Robert S. Edmonds, Marie Maclennan, John Greenfield, Tim Agustsdottir, Thorbjorg |
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 Publishing |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6335479/ http://www.ncbi.nlm.nih.gov/pubmed/30966935 https://doi.org/10.1098/rsta.2018.0010 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6335479/ http://www.ncbi.nlm.nih.gov/pubmed/30966935 http://dx.doi.org/10.1098/rsta.2018.0010 |
op_rights |
© 2019 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. |
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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1766040642409988096 |