Magnetic characterisation and correlation of a Younger Dryas tephra in North Atlantic marine sediments
A technique for identifying non-visible basaltic tephra-rich horizons of Younger Dryas (YD)/Greenlancl Stadial (GS) 1 age in northeast Atlantic sediments using rapid, non-destructive magnetic measurements is presented. Three high-resolution marine sediment cores have been studied in all E W transect...
Published in: | Journal of Quaternary Science |
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Language: | English |
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2010
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/magnetic-characterisation-and-correlation-of-a-younger-dryas-tephra-in-north-atlantic-marine-sediments(5b6628f3-bac9-412d-a58d-050133d0f268).html https://doi.org/10.1002/jqs.1320 http://www.scopus.com/inward/record.url?scp=77449141101&partnerID=8YFLogxK |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/5b6628f3-bac9-412d-a58d-050133d0f268 2023-05-15T16:39:13+02:00 Magnetic characterisation and correlation of a Younger Dryas tephra in North Atlantic marine sediments Peters, Clare Austin, William Edward Newns Walden, John Hibbert, Fiona D. 2010-03 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/magnetic-characterisation-and-correlation-of-a-younger-dryas-tephra-in-north-atlantic-marine-sediments(5b6628f3-bac9-412d-a58d-050133d0f268).html https://doi.org/10.1002/jqs.1320 http://www.scopus.com/inward/record.url?scp=77449141101&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Peters , C , Austin , W E N , Walden , J & Hibbert , F D 2010 , ' Magnetic characterisation and correlation of a Younger Dryas tephra in North Atlantic marine sediments ' , Journal of Quaternary Science , vol. 25 , no. 3 , pp. 339-347 . https://doi.org/10.1002/jqs.1320 tephra marine sediments magnetic measurements Younger Dryas geochemistry GLACIAL-INTERGLACIAL TRANSITION VEDDE ASH LAYER NGRIP ICE CORE VOLCANIC ASH HIGH-RESOLUTION LATE QUATERNARY WESTERN NORWAY NORWEGIAN SEA YR BP ICELAND article 2010 ftunstandrewcris https://doi.org/10.1002/jqs.1320 2021-12-26T14:17:32Z A technique for identifying non-visible basaltic tephra-rich horizons of Younger Dryas (YD)/Greenlancl Stadial (GS) 1 age in northeast Atlantic sediments using rapid, non-destructive magnetic measurements is presented. Three high-resolution marine sediment cores have been studied in all E W transect across the Hebridean margin: St Kilda Basin (MD95-2007), Barra Fan (MD95-2006) and Rockall Trough (MD04-2822). Magnetic susceptibilities and remanent magnetisations were measured at contiguous 1 cm resolution on bulk sediments. In all three cores, an interval with higher proportions of hard magnetic minerals coincides with a clearly defined peak in basaltic tephra shard (>250 mu m) counts, which can be constrained to the early part of the YD/GS1 based on faunal climate proxies. Electron microprobe analyses of the magnetically distinct basaltic tephra interval, in all three cores, displays the same major element geochemistry as published for the Vedde basaltic (I Tab. 1), i.e. sourced from the Icelandic volcano Kat la. The identification of transitional alkalic basaltic tephras within marine sediments could potentially be facilitated by magnetic analysis as a useful chronostratigraphic screening tool. Copyright (C) 2009 John Wiley & Sons, Ltd. Article in Journal/Newspaper ice core Iceland NGRIP North Atlantic Northeast Atlantic Norwegian Sea University of St Andrews: Research Portal Barra ENVELOPE(-61.417,-61.417,-64.367,-64.367) Norway Norwegian Sea Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) Journal of Quaternary Science 25 3 339 347 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
tephra marine sediments magnetic measurements Younger Dryas geochemistry GLACIAL-INTERGLACIAL TRANSITION VEDDE ASH LAYER NGRIP ICE CORE VOLCANIC ASH HIGH-RESOLUTION LATE QUATERNARY WESTERN NORWAY NORWEGIAN SEA YR BP ICELAND |
spellingShingle |
tephra marine sediments magnetic measurements Younger Dryas geochemistry GLACIAL-INTERGLACIAL TRANSITION VEDDE ASH LAYER NGRIP ICE CORE VOLCANIC ASH HIGH-RESOLUTION LATE QUATERNARY WESTERN NORWAY NORWEGIAN SEA YR BP ICELAND Peters, Clare Austin, William Edward Newns Walden, John Hibbert, Fiona D. Magnetic characterisation and correlation of a Younger Dryas tephra in North Atlantic marine sediments |
topic_facet |
tephra marine sediments magnetic measurements Younger Dryas geochemistry GLACIAL-INTERGLACIAL TRANSITION VEDDE ASH LAYER NGRIP ICE CORE VOLCANIC ASH HIGH-RESOLUTION LATE QUATERNARY WESTERN NORWAY NORWEGIAN SEA YR BP ICELAND |
description |
A technique for identifying non-visible basaltic tephra-rich horizons of Younger Dryas (YD)/Greenlancl Stadial (GS) 1 age in northeast Atlantic sediments using rapid, non-destructive magnetic measurements is presented. Three high-resolution marine sediment cores have been studied in all E W transect across the Hebridean margin: St Kilda Basin (MD95-2007), Barra Fan (MD95-2006) and Rockall Trough (MD04-2822). Magnetic susceptibilities and remanent magnetisations were measured at contiguous 1 cm resolution on bulk sediments. In all three cores, an interval with higher proportions of hard magnetic minerals coincides with a clearly defined peak in basaltic tephra shard (>250 mu m) counts, which can be constrained to the early part of the YD/GS1 based on faunal climate proxies. Electron microprobe analyses of the magnetically distinct basaltic tephra interval, in all three cores, displays the same major element geochemistry as published for the Vedde basaltic (I Tab. 1), i.e. sourced from the Icelandic volcano Kat la. The identification of transitional alkalic basaltic tephras within marine sediments could potentially be facilitated by magnetic analysis as a useful chronostratigraphic screening tool. Copyright (C) 2009 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Peters, Clare Austin, William Edward Newns Walden, John Hibbert, Fiona D. |
author_facet |
Peters, Clare Austin, William Edward Newns Walden, John Hibbert, Fiona D. |
author_sort |
Peters, Clare |
title |
Magnetic characterisation and correlation of a Younger Dryas tephra in North Atlantic marine sediments |
title_short |
Magnetic characterisation and correlation of a Younger Dryas tephra in North Atlantic marine sediments |
title_full |
Magnetic characterisation and correlation of a Younger Dryas tephra in North Atlantic marine sediments |
title_fullStr |
Magnetic characterisation and correlation of a Younger Dryas tephra in North Atlantic marine sediments |
title_full_unstemmed |
Magnetic characterisation and correlation of a Younger Dryas tephra in North Atlantic marine sediments |
title_sort |
magnetic characterisation and correlation of a younger dryas tephra in north atlantic marine sediments |
publishDate |
2010 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/magnetic-characterisation-and-correlation-of-a-younger-dryas-tephra-in-north-atlantic-marine-sediments(5b6628f3-bac9-412d-a58d-050133d0f268).html https://doi.org/10.1002/jqs.1320 http://www.scopus.com/inward/record.url?scp=77449141101&partnerID=8YFLogxK |
long_lat |
ENVELOPE(-61.417,-61.417,-64.367,-64.367) ENVELOPE(-15.036,-15.036,53.825,53.825) |
geographic |
Barra Norway Norwegian Sea Rockall Trough |
geographic_facet |
Barra Norway Norwegian Sea Rockall Trough |
genre |
ice core Iceland NGRIP North Atlantic Northeast Atlantic Norwegian Sea |
genre_facet |
ice core Iceland NGRIP North Atlantic Northeast Atlantic Norwegian Sea |
op_source |
Peters , C , Austin , W E N , Walden , J & Hibbert , F D 2010 , ' Magnetic characterisation and correlation of a Younger Dryas tephra in North Atlantic marine sediments ' , Journal of Quaternary Science , vol. 25 , no. 3 , pp. 339-347 . https://doi.org/10.1002/jqs.1320 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/jqs.1320 |
container_title |
Journal of Quaternary Science |
container_volume |
25 |
container_issue |
3 |
container_start_page |
339 |
op_container_end_page |
347 |
_version_ |
1766029555059916800 |