Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region: The cryptotephra record
Previous studies of marine sequences from the Faroe Islands region have identified a series of coarse-grained tephra horizons deposited during Marine Isotope Stage (MIS) 5. Here we reassess the MIS 5 tephrostratigraphy of the Faroe Islands region and focus on the cryptotephra deposits preserved with...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Language: | English |
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Online Access: | https://hdl.handle.net/1956/9552 https://doi.org/10.1016/j.palaeo.2014.05.004 |
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ftunivbergen:oai:bora.uib.no:1956/9552 2023-05-15T16:10:31+02:00 Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region: The cryptotephra record Abbott, Peter M. Austin, William E.N. Davies, Siwan M. Pearce, Nicholas John Geoffrey Rasmussen, Tine Lander Wastegård, Stefan Brendryen, Jo 2015-03-04T10:01:06Z application/pdf https://hdl.handle.net/1956/9552 https://doi.org/10.1016/j.palaeo.2014.05.004 eng eng Elsevier Norges forskningsråd: 221999 Norges forskningsråd: 223259 urn:issn:0031-0182 https://hdl.handle.net/1956/9552 https://doi.org/10.1016/j.palaeo.2014.05.004 cristin:1136777 Attribution CC BY http://creativecommons.org/licenses/by/3.0/ Copyright 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/3.0/ ). Palaeogeography, Palaeoclimatology, Palaeoecology 409 153-168 Volcanic ash Iceland Marine sequences Isochrons Palaeoclimatic synchronisation VDP::Mathematics and natural scienses: 400::Geosciences: 450::Stratigraphy and palaeontology: 461 VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Stratigrafi og paleontologi: 461 Peer reviewed Journal article 2015 ftunivbergen https://doi.org/10.1016/j.palaeo.2014.05.004 2023-03-14T17:38:40Z Previous studies of marine sequences from the Faroe Islands region have identified a series of coarse-grained tephra horizons deposited during Marine Isotope Stage (MIS) 5. Here we reassess the MIS 5 tephrostratigraphy of the Faroe Islands region and focus on the cryptotephra deposits preserved within the fine-grained fraction of marine core LINK 16. We also extend the record to encompass the late MIS 6 and early MIS 4 periods. A density separation technique, commonly used for tephra investigations in lacustrine settings but rarely applied to marine sediments, is utilised to explore the fine-grained material and EPMA and LA-ICP-MS are employed to determine the major and trace element composition of individual tephra shards. In total, 3 basaltic and 3 rhyolitic Icelandic cryptotephra deposits with homogeneous geochemical compositions are identified — all of which have the potential to act as isochronous tie-lines. Geochemical results highlight that the Grímsvötn volcanic system of Iceland is the predominant source of the basaltic horizons and the Öraefajökull or Torfajökull systems are the likely sources of the rhyolitic deposits. Three of the horizons have been previously recognised in Faroe Islands region marine sequences, with two of these deposits traceable into a Norwegian Sea sequence. An early MIS 4 rhyolitic horizon is the most widespread deposit as it can be traced into the Norwegian Sea and to the south into a record from the Rockall Trough. Basaltic and rhyolitic horizons deposited during late MIS 6 have not been recognised in other sequences and represent new additions to the regional tephrostratigraphy. publishedVersion Article in Journal/Newspaper Faroe Islands Iceland Norwegian Sea University of Bergen: Bergen Open Research Archive (BORA-UiB) Faroe Islands Norwegian Sea Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) Torfajökull ENVELOPE(-19.027,-19.027,63.898,63.898) Palaeogeography, Palaeoclimatology, Palaeoecology 409 153 168 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Volcanic ash Iceland Marine sequences Isochrons Palaeoclimatic synchronisation VDP::Mathematics and natural scienses: 400::Geosciences: 450::Stratigraphy and palaeontology: 461 VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Stratigrafi og paleontologi: 461 |
spellingShingle |
Volcanic ash Iceland Marine sequences Isochrons Palaeoclimatic synchronisation VDP::Mathematics and natural scienses: 400::Geosciences: 450::Stratigraphy and palaeontology: 461 VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Stratigrafi og paleontologi: 461 Abbott, Peter M. Austin, William E.N. Davies, Siwan M. Pearce, Nicholas John Geoffrey Rasmussen, Tine Lander Wastegård, Stefan Brendryen, Jo Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region: The cryptotephra record |
topic_facet |
Volcanic ash Iceland Marine sequences Isochrons Palaeoclimatic synchronisation VDP::Mathematics and natural scienses: 400::Geosciences: 450::Stratigraphy and palaeontology: 461 VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Stratigrafi og paleontologi: 461 |
description |
Previous studies of marine sequences from the Faroe Islands region have identified a series of coarse-grained tephra horizons deposited during Marine Isotope Stage (MIS) 5. Here we reassess the MIS 5 tephrostratigraphy of the Faroe Islands region and focus on the cryptotephra deposits preserved within the fine-grained fraction of marine core LINK 16. We also extend the record to encompass the late MIS 6 and early MIS 4 periods. A density separation technique, commonly used for tephra investigations in lacustrine settings but rarely applied to marine sediments, is utilised to explore the fine-grained material and EPMA and LA-ICP-MS are employed to determine the major and trace element composition of individual tephra shards. In total, 3 basaltic and 3 rhyolitic Icelandic cryptotephra deposits with homogeneous geochemical compositions are identified — all of which have the potential to act as isochronous tie-lines. Geochemical results highlight that the Grímsvötn volcanic system of Iceland is the predominant source of the basaltic horizons and the Öraefajökull or Torfajökull systems are the likely sources of the rhyolitic deposits. Three of the horizons have been previously recognised in Faroe Islands region marine sequences, with two of these deposits traceable into a Norwegian Sea sequence. An early MIS 4 rhyolitic horizon is the most widespread deposit as it can be traced into the Norwegian Sea and to the south into a record from the Rockall Trough. Basaltic and rhyolitic horizons deposited during late MIS 6 have not been recognised in other sequences and represent new additions to the regional tephrostratigraphy. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Abbott, Peter M. Austin, William E.N. Davies, Siwan M. Pearce, Nicholas John Geoffrey Rasmussen, Tine Lander Wastegård, Stefan Brendryen, Jo |
author_facet |
Abbott, Peter M. Austin, William E.N. Davies, Siwan M. Pearce, Nicholas John Geoffrey Rasmussen, Tine Lander Wastegård, Stefan Brendryen, Jo |
author_sort |
Abbott, Peter M. |
title |
Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region: The cryptotephra record |
title_short |
Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region: The cryptotephra record |
title_full |
Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region: The cryptotephra record |
title_fullStr |
Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region: The cryptotephra record |
title_full_unstemmed |
Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region: The cryptotephra record |
title_sort |
re-evaluation and extension of the marine isotope stage 5 tephrostratigraphy of the faroe islands region: the cryptotephra record |
publisher |
Elsevier |
publishDate |
2015 |
url |
https://hdl.handle.net/1956/9552 https://doi.org/10.1016/j.palaeo.2014.05.004 |
long_lat |
ENVELOPE(-15.036,-15.036,53.825,53.825) ENVELOPE(-19.027,-19.027,63.898,63.898) |
geographic |
Faroe Islands Norwegian Sea Rockall Trough Torfajökull |
geographic_facet |
Faroe Islands Norwegian Sea Rockall Trough Torfajökull |
genre |
Faroe Islands Iceland Norwegian Sea |
genre_facet |
Faroe Islands Iceland Norwegian Sea |
op_source |
Palaeogeography, Palaeoclimatology, Palaeoecology 409 153-168 |
op_relation |
Norges forskningsråd: 221999 Norges forskningsråd: 223259 urn:issn:0031-0182 https://hdl.handle.net/1956/9552 https://doi.org/10.1016/j.palaeo.2014.05.004 cristin:1136777 |
op_rights |
Attribution CC BY http://creativecommons.org/licenses/by/3.0/ Copyright 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/3.0/ ). |
op_doi |
https://doi.org/10.1016/j.palaeo.2014.05.004 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
409 |
container_start_page |
153 |
op_container_end_page |
168 |
_version_ |
1765995696661463040 |