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...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/283064 2024-02-04T10:01:26+01:00 Melt movement through the Icelandic crust. White, Robert S Edmonds, Marie Maclennan, John Greenfield, Tim Agustsdottir, Thorbjorg 2019-02-25 Print application/pdf https://www.repository.cam.ac.uk/handle/1810/283064 https://doi.org/10.17863/CAM.30426 eng eng The Royal Society http://dx.doi.org/10.1098/rsta.2018.0010 Philos Trans A Math Phys Eng Sci https://www.repository.cam.ac.uk/handle/1810/283064 doi:10.17863/CAM.30426 Iceland basaltic melt carbon dioxide geobarometry rifts seismology Article 2019 ftunivcam https://doi.org/10.17863/CAM.30426 2024-01-11T23:28:36Z 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 Apollo - University of Cambridge Repository |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
Iceland basaltic melt carbon dioxide geobarometry rifts seismology |
spellingShingle |
Iceland basaltic melt carbon dioxide geobarometry rifts seismology White, Robert S Edmonds, Marie Maclennan, John Greenfield, Tim Agustsdottir, Thorbjorg Melt movement through the Icelandic crust. |
topic_facet |
Iceland basaltic melt carbon dioxide geobarometry rifts seismology |
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'. |
format |
Article in Journal/Newspaper |
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 |
publishDate |
2019 |
url |
https://www.repository.cam.ac.uk/handle/1810/283064 https://doi.org/10.17863/CAM.30426 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/283064 doi:10.17863/CAM.30426 |
op_doi |
https://doi.org/10.17863/CAM.30426 |
_version_ |
1789967332701896704 |