Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region:The cryptotephra record
Abstract 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 prese...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2014
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/reevaluation-and-extension-of-the-marine-isotope-stage-5-tephrostratigraphy-of-the-faroe-islands-region(bbe55179-871f-400b-ad14-eef57c57bff5).html https://doi.org/10.1016/j.palaeo.2014.05.004 https://research-repository.st-andrews.ac.uk/bitstream/10023/5015/1/abbott2014paleogeogclimecology153.pdf http://www.sciencedirect.com/science/article/pii/S0031018214002284 |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/bbe55179-871f-400b-ad14-eef57c57bff5 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, P.M. Austin, W.E.N. Davies, S.M. Pearce, N.J.G. Rasmussen, T.L. Wastegård, S. Brendryen, J. 2014-09-01 application/pdf https://risweb.st-andrews.ac.uk/portal/en/researchoutput/reevaluation-and-extension-of-the-marine-isotope-stage-5-tephrostratigraphy-of-the-faroe-islands-region(bbe55179-871f-400b-ad14-eef57c57bff5).html https://doi.org/10.1016/j.palaeo.2014.05.004 https://research-repository.st-andrews.ac.uk/bitstream/10023/5015/1/abbott2014paleogeogclimecology153.pdf http://www.sciencedirect.com/science/article/pii/S0031018214002284 eng eng info:eu-repo/semantics/openAccess Abbott , P M , Austin , W E N , Davies , S M , Pearce , N J G , Rasmussen , T L , Wastegård , S & Brendryen , J 2014 , ' Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region : The cryptotephra record ' , Palaeogeography, Palaeoclimatology, Palaeoecology , vol. 409 , pp. 153-168 . https://doi.org/10.1016/j.palaeo.2014.05.004 Volcanic ash Iceland Marine sequences Isochrons Palaeoclimatic synchronisation article 2014 ftunstandrewcris https://doi.org/10.1016/j.palaeo.2014.05.004 2022-06-02T07:43:31Z Abstract 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. Article in Journal/Newspaper Faroe Islands Iceland Norwegian Sea University of St Andrews: Research Portal 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 St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Volcanic ash Iceland Marine sequences Isochrons Palaeoclimatic synchronisation |
spellingShingle |
Volcanic ash Iceland Marine sequences Isochrons Palaeoclimatic synchronisation Abbott, P.M. Austin, W.E.N. Davies, S.M. Pearce, N.J.G. Rasmussen, T.L. Wastegård, S. Brendryen, J. 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 |
description |
Abstract 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. |
format |
Article in Journal/Newspaper |
author |
Abbott, P.M. Austin, W.E.N. Davies, S.M. Pearce, N.J.G. Rasmussen, T.L. Wastegård, S. Brendryen, J. |
author_facet |
Abbott, P.M. Austin, W.E.N. Davies, S.M. Pearce, N.J.G. Rasmussen, T.L. Wastegård, S. Brendryen, J. |
author_sort |
Abbott, P.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 |
publishDate |
2014 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/reevaluation-and-extension-of-the-marine-isotope-stage-5-tephrostratigraphy-of-the-faroe-islands-region(bbe55179-871f-400b-ad14-eef57c57bff5).html https://doi.org/10.1016/j.palaeo.2014.05.004 https://research-repository.st-andrews.ac.uk/bitstream/10023/5015/1/abbott2014paleogeogclimecology153.pdf http://www.sciencedirect.com/science/article/pii/S0031018214002284 |
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 |
Abbott , P M , Austin , W E N , Davies , S M , Pearce , N J G , Rasmussen , T L , Wastegård , S & Brendryen , J 2014 , ' Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region : The cryptotephra record ' , Palaeogeography, Palaeoclimatology, Palaeoecology , vol. 409 , pp. 153-168 . https://doi.org/10.1016/j.palaeo.2014.05.004 |
op_rights |
info:eu-repo/semantics/openAccess |
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 |
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1765995697746739200 |