The role of the Iceland Ice Sheet in the North Atlantic during the late Quaternary: a review and evidence from Denmark Strait
Abstract Investigations indicate that the Iceland Ice Sheet was reduced in size during MIS 3 but readvanced to the shelf break at the LGM. Retreat occurred very rapidly around 15 k–16 k cal. yr BP. By contrast, the margin of the ice sheet on the East Greenland shelf, north of the Denmark Strait, was...
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crwiley:10.1002/jqs.1142 2024-06-02T08:05:44+00:00 The role of the Iceland Ice Sheet in the North Atlantic during the late Quaternary: a review and evidence from Denmark Strait Andrews, John T. 2007 http://dx.doi.org/10.1002/jqs.1142 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1142 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1142 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 23, issue 1, page 3-20 ISSN 0267-8179 1099-1417 journal-article 2007 crwiley https://doi.org/10.1002/jqs.1142 2024-05-03T10:47:21Z Abstract Investigations indicate that the Iceland Ice Sheet was reduced in size during MIS 3 but readvanced to the shelf break at the LGM. Retreat occurred very rapidly around 15 k–16 k cal. yr BP. By contrast, the margin of the ice sheet on the East Greenland shelf, north of the Denmark Strait, was at or close to the shelf break during MIS 3 and 2 and retreat starting ∼17 k cal. yr BP. Quantitative X‐ray diffraction analysis of the <2 mm sediment fraction was undertaken on 161 samples from Iceland and East Greenland diamictons, and from cores on the slopes and margins of the Denmark Strait. Weight% mineralogical data are used in a principal component analysis to differentiate sediments derived from the two margins. The first two PC axes explain 52% of the variance. These associations are used to characterise sediments as being affiliated with (a) Iceland, (b) East Greenland or (c) mixed. The contribution from Iceland becomes prominent during MIS 2. The extensive outcrop of early Tertiary basalts on East Greenland between 68° and 71° N is an alternative source for basaltic clasts and North Atlantic sediments with ε Nd(0) values close to ±0. Copyright © 2007 John Wiley & Sons, Ltd. Article in Journal/Newspaper Denmark Strait East Greenland Greenland Ice Sheet Iceland North Atlantic Wiley Online Library Greenland Journal of Quaternary Science 23 1 3 20 |
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English |
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Abstract Investigations indicate that the Iceland Ice Sheet was reduced in size during MIS 3 but readvanced to the shelf break at the LGM. Retreat occurred very rapidly around 15 k–16 k cal. yr BP. By contrast, the margin of the ice sheet on the East Greenland shelf, north of the Denmark Strait, was at or close to the shelf break during MIS 3 and 2 and retreat starting ∼17 k cal. yr BP. Quantitative X‐ray diffraction analysis of the <2 mm sediment fraction was undertaken on 161 samples from Iceland and East Greenland diamictons, and from cores on the slopes and margins of the Denmark Strait. Weight% mineralogical data are used in a principal component analysis to differentiate sediments derived from the two margins. The first two PC axes explain 52% of the variance. These associations are used to characterise sediments as being affiliated with (a) Iceland, (b) East Greenland or (c) mixed. The contribution from Iceland becomes prominent during MIS 2. The extensive outcrop of early Tertiary basalts on East Greenland between 68° and 71° N is an alternative source for basaltic clasts and North Atlantic sediments with ε Nd(0) values close to ±0. Copyright © 2007 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Andrews, John T. |
spellingShingle |
Andrews, John T. The role of the Iceland Ice Sheet in the North Atlantic during the late Quaternary: a review and evidence from Denmark Strait |
author_facet |
Andrews, John T. |
author_sort |
Andrews, John T. |
title |
The role of the Iceland Ice Sheet in the North Atlantic during the late Quaternary: a review and evidence from Denmark Strait |
title_short |
The role of the Iceland Ice Sheet in the North Atlantic during the late Quaternary: a review and evidence from Denmark Strait |
title_full |
The role of the Iceland Ice Sheet in the North Atlantic during the late Quaternary: a review and evidence from Denmark Strait |
title_fullStr |
The role of the Iceland Ice Sheet in the North Atlantic during the late Quaternary: a review and evidence from Denmark Strait |
title_full_unstemmed |
The role of the Iceland Ice Sheet in the North Atlantic during the late Quaternary: a review and evidence from Denmark Strait |
title_sort |
role of the iceland ice sheet in the north atlantic during the late quaternary: a review and evidence from denmark strait |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1002/jqs.1142 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1142 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1142 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Denmark Strait East Greenland Greenland Ice Sheet Iceland North Atlantic |
genre_facet |
Denmark Strait East Greenland Greenland Ice Sheet Iceland North Atlantic |
op_source |
Journal of Quaternary Science volume 23, issue 1, page 3-20 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.1142 |
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Journal of Quaternary Science |
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23 |
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1 |
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3 |
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20 |
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1800750609449615360 |