Last glacial period cryptotephra deposits in an eastern North Atlantic marine sequence: exploring linkages to the Greenland ice-cores
The establishment of a tephra framework for the Greenland ice-cores spanning the last glacial period, particularly between 25 and 45 ka b2k, provides strong potential for precisely correlating other palaeoclimatic records to these key archives. Tephra-based synchronisation allows the relative timing...
Published in: | Quaternary Geochronology |
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Language: | English |
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2016
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Online Access: | https://eprints.soton.ac.uk/405023/ https://eprints.soton.ac.uk/405023/1/Abbottetal-TRACE-2820CQ-GREENACCESS.PDF |
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ftsouthampton:oai:eprints.soton.ac.uk:405023 2023-07-30T04:03:48+02:00 Last glacial period cryptotephra deposits in an eastern North Atlantic marine sequence: exploring linkages to the Greenland ice-cores Abbott, Peter Bourne, Anna Purcell, Catherine Davies, Siwan Scourse, James Pearce, Nick 2016-02 application/octet-stream https://eprints.soton.ac.uk/405023/ https://eprints.soton.ac.uk/405023/1/Abbottetal-TRACE-2820CQ-GREENACCESS.PDF en English eng https://eprints.soton.ac.uk/405023/1/Abbottetal-TRACE-2820CQ-GREENACCESS.PDF Abbott, Peter, Bourne, Anna and Purcell, Catherine et al. (2016) Last glacial period cryptotephra deposits in an eastern North Atlantic marine sequence: exploring linkages to the Greenland ice-cores. Quaternary Geochronology, 31, 62-76. (doi:10.1016/j.quageo.2015.11.001 <http://dx.doi.org/10.1016/j.quageo.2015.11.001>). cc_by_nc_nd_4 Article PeerReviewed 2016 ftsouthampton https://doi.org/10.1016/j.quageo.2015.11.001 2023-07-09T22:13:00Z The establishment of a tephra framework for the Greenland ice-cores spanning the last glacial period, particularly between 25 and 45 ka b2k, provides strong potential for precisely correlating other palaeoclimatic records to these key archives. Tephra-based synchronisation allows the relative timing of past climatic changes recorded within different depositional environments and potential causal mechanisms to be assessed. Recent studies of North Atlantic marine records have demonstrated the potential of tracing cryptotephra horizons in these sequences and the development of protocols now allows a careful assessment of the isochronous nature of such horizons. Here we report on tephrochronological investigations of a marine sequence retrieved from the Goban Spur, Eastern North Atlantic, covering ?25–60 ka b2k. Density and magnetic separation techniques and an assessment of potential transport and depositional mechanisms have identified three previously unknown isochronous tephra horizons along with deposits of the widespread North Atlantic Ash Zone II and Faroe Marine Ash Zone III. Correlations between the new horizons and the Greenland ice-core tephra framework are explored and despite no tie-lines being identified the key roles that high-resolution climatostratigraphy and shard-specific trace element analysis can play within the assessment of correlations is demonstrated. The previously unknown horizons are new additions to the overall North Atlantic tephra framework for the last glacial period and could be key horizons for future correlations. Article in Journal/Newspaper Greenland Greenland ice core Greenland ice cores ice core North Atlantic University of Southampton: e-Prints Soton Greenland Quaternary Geochronology 31 62 76 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
The establishment of a tephra framework for the Greenland ice-cores spanning the last glacial period, particularly between 25 and 45 ka b2k, provides strong potential for precisely correlating other palaeoclimatic records to these key archives. Tephra-based synchronisation allows the relative timing of past climatic changes recorded within different depositional environments and potential causal mechanisms to be assessed. Recent studies of North Atlantic marine records have demonstrated the potential of tracing cryptotephra horizons in these sequences and the development of protocols now allows a careful assessment of the isochronous nature of such horizons. Here we report on tephrochronological investigations of a marine sequence retrieved from the Goban Spur, Eastern North Atlantic, covering ?25–60 ka b2k. Density and magnetic separation techniques and an assessment of potential transport and depositional mechanisms have identified three previously unknown isochronous tephra horizons along with deposits of the widespread North Atlantic Ash Zone II and Faroe Marine Ash Zone III. Correlations between the new horizons and the Greenland ice-core tephra framework are explored and despite no tie-lines being identified the key roles that high-resolution climatostratigraphy and shard-specific trace element analysis can play within the assessment of correlations is demonstrated. The previously unknown horizons are new additions to the overall North Atlantic tephra framework for the last glacial period and could be key horizons for future correlations. |
format |
Article in Journal/Newspaper |
author |
Abbott, Peter Bourne, Anna Purcell, Catherine Davies, Siwan Scourse, James Pearce, Nick |
spellingShingle |
Abbott, Peter Bourne, Anna Purcell, Catherine Davies, Siwan Scourse, James Pearce, Nick Last glacial period cryptotephra deposits in an eastern North Atlantic marine sequence: exploring linkages to the Greenland ice-cores |
author_facet |
Abbott, Peter Bourne, Anna Purcell, Catherine Davies, Siwan Scourse, James Pearce, Nick |
author_sort |
Abbott, Peter |
title |
Last glacial period cryptotephra deposits in an eastern North Atlantic marine sequence: exploring linkages to the Greenland ice-cores |
title_short |
Last glacial period cryptotephra deposits in an eastern North Atlantic marine sequence: exploring linkages to the Greenland ice-cores |
title_full |
Last glacial period cryptotephra deposits in an eastern North Atlantic marine sequence: exploring linkages to the Greenland ice-cores |
title_fullStr |
Last glacial period cryptotephra deposits in an eastern North Atlantic marine sequence: exploring linkages to the Greenland ice-cores |
title_full_unstemmed |
Last glacial period cryptotephra deposits in an eastern North Atlantic marine sequence: exploring linkages to the Greenland ice-cores |
title_sort |
last glacial period cryptotephra deposits in an eastern north atlantic marine sequence: exploring linkages to the greenland ice-cores |
publishDate |
2016 |
url |
https://eprints.soton.ac.uk/405023/ https://eprints.soton.ac.uk/405023/1/Abbottetal-TRACE-2820CQ-GREENACCESS.PDF |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core Greenland ice cores ice core North Atlantic |
genre_facet |
Greenland Greenland ice core Greenland ice cores ice core North Atlantic |
op_relation |
https://eprints.soton.ac.uk/405023/1/Abbottetal-TRACE-2820CQ-GREENACCESS.PDF Abbott, Peter, Bourne, Anna and Purcell, Catherine et al. (2016) Last glacial period cryptotephra deposits in an eastern North Atlantic marine sequence: exploring linkages to the Greenland ice-cores. Quaternary Geochronology, 31, 62-76. (doi:10.1016/j.quageo.2015.11.001 <http://dx.doi.org/10.1016/j.quageo.2015.11.001>). |
op_rights |
cc_by_nc_nd_4 |
op_doi |
https://doi.org/10.1016/j.quageo.2015.11.001 |
container_title |
Quaternary Geochronology |
container_volume |
31 |
container_start_page |
62 |
op_container_end_page |
76 |
_version_ |
1772814895023128576 |