A complex subglacial clastic dyke swarm, Solheimajokull, southern Iceland
A complex network of clastic dykes dissects loosely consolidated Holocene sediments along the east flank of the proglacial braid plain of Solheimajokull, southern Iceland. The dykes comprise downward-bifurcating intrusions up to 0.5 m thick and several metres in length and are intruded into glacioge...
Published in: | Sedimentary Geology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2005
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Online Access: | https://repository.royalholloway.ac.uk/items/2cbb3a2e-0c4f-99d9-f3f2-83e26cc1790b/1/ https://doi.org/10.1016/j.sedgeo.2005.06.012 |
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ftholloway:oai:repository.royalholloway.ac.uk:2cbb3a2e-0c4f-99d9-f3f2-83e26cc1790b/1 2023-05-15T16:21:39+02:00 A complex subglacial clastic dyke swarm, Solheimajokull, southern Iceland Le Heron, Daniel Paul Etienne, James L. 2005-01-11 https://repository.royalholloway.ac.uk/items/2cbb3a2e-0c4f-99d9-f3f2-83e26cc1790b/1/ https://doi.org/10.1016/j.sedgeo.2005.06.012 eng eng http://www.sciencedirect.com/science/journal/00370738 https://repository.royalholloway.ac.uk/items/2cbb3a2e-0c4f-99d9-f3f2-83e26cc1790b/1/ doi:10.1016/j.sedgeo.2005.06.012 Sedimentary Geology, 181 (1-2) Clastic dykes Glacial sedimentology Subglacial loading Iceland Faculty of Science\Earth Sciences info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2005 ftholloway https://doi.org/10.1016/j.sedgeo.2005.06.012 2022-09-26T13:03:59Z A complex network of clastic dykes dissects loosely consolidated Holocene sediments along the east flank of the proglacial braid plain of Solheimajokull, southern Iceland. The dykes comprise downward-bifurcating intrusions up to 0.5 m thick and several metres in length and are intruded into glaciogenic deposits (sandy gravel, gravelly sand, interlaminated silt and sand, and diamicton). The dykes were sourced from a clast-poor sandy diamicton, interpreted as a subglacial till, and were intruded downwards beneath Solheimajokull glacier during a previous phase of advance. As the glacier advanced southwards, it loaded the sediment column resulting in the intrusion of dykes with a consistent south–southwest dip (with rare northward-dipping examples). The dyke fills are characterised by laminated sediment, with laminae oriented parallel to the dyke margins and comprise interlaminated clay, silty clay, silt, sand, sandy gravel and diamicton. In some dykes, high concentrations of pebble- to boulder-sized clasts occur in association with rotated pods of the laminated sediment. The laminae are thought to have evolved by a slow, long-lived intrusion process that involved the repeated fracture and expansion of the host sediments followed by viscous smearing-on of subglacial material onto the dyke walls, rather than rapid injection of fluidised sediment. Article in Journal/Newspaper glacier Iceland Royal Holloway University of London: Royal Holloway Digital Repository Sedimentary Geology 181 1-2 25 37 |
institution |
Open Polar |
collection |
Royal Holloway University of London: Royal Holloway Digital Repository |
op_collection_id |
ftholloway |
language |
English |
topic |
Clastic dykes Glacial sedimentology Subglacial loading Iceland Faculty of Science\Earth Sciences |
spellingShingle |
Clastic dykes Glacial sedimentology Subglacial loading Iceland Faculty of Science\Earth Sciences Le Heron, Daniel Paul Etienne, James L. A complex subglacial clastic dyke swarm, Solheimajokull, southern Iceland |
topic_facet |
Clastic dykes Glacial sedimentology Subglacial loading Iceland Faculty of Science\Earth Sciences |
description |
A complex network of clastic dykes dissects loosely consolidated Holocene sediments along the east flank of the proglacial braid plain of Solheimajokull, southern Iceland. The dykes comprise downward-bifurcating intrusions up to 0.5 m thick and several metres in length and are intruded into glaciogenic deposits (sandy gravel, gravelly sand, interlaminated silt and sand, and diamicton). The dykes were sourced from a clast-poor sandy diamicton, interpreted as a subglacial till, and were intruded downwards beneath Solheimajokull glacier during a previous phase of advance. As the glacier advanced southwards, it loaded the sediment column resulting in the intrusion of dykes with a consistent south–southwest dip (with rare northward-dipping examples). The dyke fills are characterised by laminated sediment, with laminae oriented parallel to the dyke margins and comprise interlaminated clay, silty clay, silt, sand, sandy gravel and diamicton. In some dykes, high concentrations of pebble- to boulder-sized clasts occur in association with rotated pods of the laminated sediment. The laminae are thought to have evolved by a slow, long-lived intrusion process that involved the repeated fracture and expansion of the host sediments followed by viscous smearing-on of subglacial material onto the dyke walls, rather than rapid injection of fluidised sediment. |
format |
Article in Journal/Newspaper |
author |
Le Heron, Daniel Paul Etienne, James L. |
author_facet |
Le Heron, Daniel Paul Etienne, James L. |
author_sort |
Le Heron, Daniel Paul |
title |
A complex subglacial clastic dyke swarm, Solheimajokull, southern Iceland |
title_short |
A complex subglacial clastic dyke swarm, Solheimajokull, southern Iceland |
title_full |
A complex subglacial clastic dyke swarm, Solheimajokull, southern Iceland |
title_fullStr |
A complex subglacial clastic dyke swarm, Solheimajokull, southern Iceland |
title_full_unstemmed |
A complex subglacial clastic dyke swarm, Solheimajokull, southern Iceland |
title_sort |
complex subglacial clastic dyke swarm, solheimajokull, southern iceland |
publishDate |
2005 |
url |
https://repository.royalholloway.ac.uk/items/2cbb3a2e-0c4f-99d9-f3f2-83e26cc1790b/1/ https://doi.org/10.1016/j.sedgeo.2005.06.012 |
genre |
glacier Iceland |
genre_facet |
glacier Iceland |
op_source |
Sedimentary Geology, 181 (1-2) |
op_relation |
http://www.sciencedirect.com/science/journal/00370738 https://repository.royalholloway.ac.uk/items/2cbb3a2e-0c4f-99d9-f3f2-83e26cc1790b/1/ doi:10.1016/j.sedgeo.2005.06.012 |
op_doi |
https://doi.org/10.1016/j.sedgeo.2005.06.012 |
container_title |
Sedimentary Geology |
container_volume |
181 |
container_issue |
1-2 |
container_start_page |
25 |
op_container_end_page |
37 |
_version_ |
1766009654531325952 |