A North Atlantic tephrostratigraphical framework for 130-60 ka b2k:new tephra discoveries, marine-based correlations, and future challenges
Building chronological frameworks for proxy sequences spanning 130e60 ka b2k is plagued by difficulties and uncertainties. Recent developments in the North Atlantic region, however, affirm the potential offered by tephrochronology and specifically the search for cryptotephra. Here we review the pote...
Published in: | Quaternary Science Reviews |
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2014
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Online Access: | https://curis.ku.dk/portal/da/publications/a-north-atlantic-tephrostratigraphical-framework-for-13060-ka-b2k(fefc5009-61bb-4495-b648-a511be3dbe01).html https://doi.org/10.1016/j.quascirev.2014.03.024 |
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ftcopenhagenunip:oai:pure.atira.dk:publications/fefc5009-61bb-4495-b648-a511be3dbe01 2024-06-09T07:46:27+00:00 A North Atlantic tephrostratigraphical framework for 130-60 ka b2k:new tephra discoveries, marine-based correlations, and future challenges Siwan M., Davis Peter M., Abbott Rhian H., Meara Nicholas J.G., Pearce William E. N., Austin Mark R., Chapman Svensson, Anders Bigler, Matthias Rasmussen, Tine L. Rasmussen, Sune Olander Farmer, Elizabeth J. 2014-12-15 https://curis.ku.dk/portal/da/publications/a-north-atlantic-tephrostratigraphical-framework-for-13060-ka-b2k(fefc5009-61bb-4495-b648-a511be3dbe01).html https://doi.org/10.1016/j.quascirev.2014.03.024 eng eng info:eu-repo/semantics/restrictedAccess Siwan M. , D , Peter M. , A , Rhian H. , M , Nicholas J.G. , P , William E. N. , A , Mark R. , C , Svensson , A , Bigler , M , Rasmussen , T L , Rasmussen , S O & Farmer , E J 2014 , ' A North Atlantic tephrostratigraphical framework for 130-60 ka b2k : new tephra discoveries, marine-based correlations, and future challenges ' , Quaternary Science Reviews , vol. 106 , pp. 101-121 . https://doi.org/10.1016/j.quascirev.2014.03.024 article 2014 ftcopenhagenunip https://doi.org/10.1016/j.quascirev.2014.03.024 2024-05-16T11:29:15Z Building chronological frameworks for proxy sequences spanning 130e60 ka b2k is plagued by difficulties and uncertainties. Recent developments in the North Atlantic region, however, affirm the potential offered by tephrochronology and specifically the search for cryptotephra. Here we review the potential offered by tephrostratigraphy for sequences spanning 130e60 ka b2k. We combine newly identified cryptotephra deposits from the NGRIP ice-core and a marine core from the Iceland Basin with previously published data from the ice and marine realms to construct the first tephrostratigraphical framework for this time-interval. Forty-three tephra or cryptotephra deposits are incorporated into this framework; twenty three tephra deposits are found in the Greenland ice-cores, including nine new NGRIP tephras, and twenty separate deposits are preserved in various North Atlantic marine sequences. Major, minor and trace element results are presented for the new NGRIP horizons together with age estimates based on their position within the ice-core record. Basaltic tephras of Icelandic origin dominate the framework with only eight tephras of rhyolitic composition found. New results from marine core MD99-2253 also illustrate some of the complexities and challenges of assessing the depositional integrity of marine cryptotephra deposits. Tephra-based correlations in the marine environment provide independent tie-points for this time-interval and highlight the potential of widening the application of tephrochronology. Further investigations, however, are required, that combine robust geochemical fingerprinting and a rigorous assessment of tephra depositional processes, in order to trace coeval events between the two depositional realms Article in Journal/Newspaper Greenland Greenland ice cores ice core Iceland NGRIP North Atlantic University of Copenhagen: Research Greenland Quaternary Science Reviews 106 101 121 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Building chronological frameworks for proxy sequences spanning 130e60 ka b2k is plagued by difficulties and uncertainties. Recent developments in the North Atlantic region, however, affirm the potential offered by tephrochronology and specifically the search for cryptotephra. Here we review the potential offered by tephrostratigraphy for sequences spanning 130e60 ka b2k. We combine newly identified cryptotephra deposits from the NGRIP ice-core and a marine core from the Iceland Basin with previously published data from the ice and marine realms to construct the first tephrostratigraphical framework for this time-interval. Forty-three tephra or cryptotephra deposits are incorporated into this framework; twenty three tephra deposits are found in the Greenland ice-cores, including nine new NGRIP tephras, and twenty separate deposits are preserved in various North Atlantic marine sequences. Major, minor and trace element results are presented for the new NGRIP horizons together with age estimates based on their position within the ice-core record. Basaltic tephras of Icelandic origin dominate the framework with only eight tephras of rhyolitic composition found. New results from marine core MD99-2253 also illustrate some of the complexities and challenges of assessing the depositional integrity of marine cryptotephra deposits. Tephra-based correlations in the marine environment provide independent tie-points for this time-interval and highlight the potential of widening the application of tephrochronology. Further investigations, however, are required, that combine robust geochemical fingerprinting and a rigorous assessment of tephra depositional processes, in order to trace coeval events between the two depositional realms |
format |
Article in Journal/Newspaper |
author |
Siwan M., Davis Peter M., Abbott Rhian H., Meara Nicholas J.G., Pearce William E. N., Austin Mark R., Chapman Svensson, Anders Bigler, Matthias Rasmussen, Tine L. Rasmussen, Sune Olander Farmer, Elizabeth J. |
spellingShingle |
Siwan M., Davis Peter M., Abbott Rhian H., Meara Nicholas J.G., Pearce William E. N., Austin Mark R., Chapman Svensson, Anders Bigler, Matthias Rasmussen, Tine L. Rasmussen, Sune Olander Farmer, Elizabeth J. A North Atlantic tephrostratigraphical framework for 130-60 ka b2k:new tephra discoveries, marine-based correlations, and future challenges |
author_facet |
Siwan M., Davis Peter M., Abbott Rhian H., Meara Nicholas J.G., Pearce William E. N., Austin Mark R., Chapman Svensson, Anders Bigler, Matthias Rasmussen, Tine L. Rasmussen, Sune Olander Farmer, Elizabeth J. |
author_sort |
Siwan M., Davis |
title |
A North Atlantic tephrostratigraphical framework for 130-60 ka b2k:new tephra discoveries, marine-based correlations, and future challenges |
title_short |
A North Atlantic tephrostratigraphical framework for 130-60 ka b2k:new tephra discoveries, marine-based correlations, and future challenges |
title_full |
A North Atlantic tephrostratigraphical framework for 130-60 ka b2k:new tephra discoveries, marine-based correlations, and future challenges |
title_fullStr |
A North Atlantic tephrostratigraphical framework for 130-60 ka b2k:new tephra discoveries, marine-based correlations, and future challenges |
title_full_unstemmed |
A North Atlantic tephrostratigraphical framework for 130-60 ka b2k:new tephra discoveries, marine-based correlations, and future challenges |
title_sort |
north atlantic tephrostratigraphical framework for 130-60 ka b2k:new tephra discoveries, marine-based correlations, and future challenges |
publishDate |
2014 |
url |
https://curis.ku.dk/portal/da/publications/a-north-atlantic-tephrostratigraphical-framework-for-13060-ka-b2k(fefc5009-61bb-4495-b648-a511be3dbe01).html https://doi.org/10.1016/j.quascirev.2014.03.024 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores ice core Iceland NGRIP North Atlantic |
genre_facet |
Greenland Greenland ice cores ice core Iceland NGRIP North Atlantic |
op_source |
Siwan M. , D , Peter M. , A , Rhian H. , M , Nicholas J.G. , P , William E. N. , A , Mark R. , C , Svensson , A , Bigler , M , Rasmussen , T L , Rasmussen , S O & Farmer , E J 2014 , ' A North Atlantic tephrostratigraphical framework for 130-60 ka b2k : new tephra discoveries, marine-based correlations, and future challenges ' , Quaternary Science Reviews , vol. 106 , pp. 101-121 . https://doi.org/10.1016/j.quascirev.2014.03.024 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2014.03.024 |
container_title |
Quaternary Science Reviews |
container_volume |
106 |
container_start_page |
101 |
op_container_end_page |
121 |
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1801376310606430208 |