A detailed palaeomagnetic study of the oldest ({approx}15 Myr) lava sequences in Northwest Iceland
We have determined the directions of primary remanence in over 400 lava flows in the northwestern peninsula of Iceland (near 66.1°N, 23.3°W). These lavas were sampled in 16 profiles spread across 75 km, at the stratigraphic level of the oldest (approximately 15 Myr in age) of several distinctive lig...
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fthighwire:oai:open-archive.highwire.org:gji:155/3/991 2023-05-15T16:19:39+02:00 A detailed palaeomagnetic study of the oldest ({approx}15 Myr) lava sequences in Northwest Iceland Kristjansson, Leo Hardarson, Björn S. Audunsson, Haraldur 2003-12-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/155/3/991 https://doi.org/10.1111/j.1365-246X.2003.02111.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/155/3/991 http://dx.doi.org/10.1111/j.1365-246X.2003.02111.x Copyright (C) 2003, Oxford University Press Articles TEXT 2003 fthighwire https://doi.org/10.1111/j.1365-246X.2003.02111.x 2013-05-27T00:23:20Z We have determined the directions of primary remanence in over 400 lava flows in the northwestern peninsula of Iceland (near 66.1°N, 23.3°W). These lavas were sampled in 16 profiles spread across 75 km, at the stratigraphic level of the oldest (approximately 15 Myr in age) of several distinctive lignite-bearing sediments in the peninsula. We find that the pattern of polarity reversals in the lava pile is broadly similar in these profiles but it is generally not possible to trace short polarity zones and excursions over more than a few kilometres laterally. Our results, which also include measurements on the lignite sediments at three sites, are consistent with previous suggestions that these sediment beds represent a time gap of the order of 0.2 Myr between the lavas above and below. The mean virtual geomagnetic pole of this collection is ‘far-sided’ by approximately 7°, and the scatter of individual poles is greater than that in palaeomagnetic surveys on younger lava series in Iceland. Text Geomagnetic Pole Iceland HighWire Press (Stanford University) Geophysical Journal International 155 3 991 1005 |
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English |
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Articles Kristjansson, Leo Hardarson, Björn S. Audunsson, Haraldur A detailed palaeomagnetic study of the oldest ({approx}15 Myr) lava sequences in Northwest Iceland |
topic_facet |
Articles |
description |
We have determined the directions of primary remanence in over 400 lava flows in the northwestern peninsula of Iceland (near 66.1°N, 23.3°W). These lavas were sampled in 16 profiles spread across 75 km, at the stratigraphic level of the oldest (approximately 15 Myr in age) of several distinctive lignite-bearing sediments in the peninsula. We find that the pattern of polarity reversals in the lava pile is broadly similar in these profiles but it is generally not possible to trace short polarity zones and excursions over more than a few kilometres laterally. Our results, which also include measurements on the lignite sediments at three sites, are consistent with previous suggestions that these sediment beds represent a time gap of the order of 0.2 Myr between the lavas above and below. The mean virtual geomagnetic pole of this collection is ‘far-sided’ by approximately 7°, and the scatter of individual poles is greater than that in palaeomagnetic surveys on younger lava series in Iceland. |
format |
Text |
author |
Kristjansson, Leo Hardarson, Björn S. Audunsson, Haraldur |
author_facet |
Kristjansson, Leo Hardarson, Björn S. Audunsson, Haraldur |
author_sort |
Kristjansson, Leo |
title |
A detailed palaeomagnetic study of the oldest ({approx}15 Myr) lava sequences in Northwest Iceland |
title_short |
A detailed palaeomagnetic study of the oldest ({approx}15 Myr) lava sequences in Northwest Iceland |
title_full |
A detailed palaeomagnetic study of the oldest ({approx}15 Myr) lava sequences in Northwest Iceland |
title_fullStr |
A detailed palaeomagnetic study of the oldest ({approx}15 Myr) lava sequences in Northwest Iceland |
title_full_unstemmed |
A detailed palaeomagnetic study of the oldest ({approx}15 Myr) lava sequences in Northwest Iceland |
title_sort |
detailed palaeomagnetic study of the oldest ({approx}15 myr) lava sequences in northwest iceland |
publisher |
Oxford University Press |
publishDate |
2003 |
url |
http://gji.oxfordjournals.org/cgi/content/short/155/3/991 https://doi.org/10.1111/j.1365-246X.2003.02111.x |
genre |
Geomagnetic Pole Iceland |
genre_facet |
Geomagnetic Pole Iceland |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/155/3/991 http://dx.doi.org/10.1111/j.1365-246X.2003.02111.x |
op_rights |
Copyright (C) 2003, Oxford University Press |
op_doi |
https://doi.org/10.1111/j.1365-246X.2003.02111.x |
container_title |
Geophysical Journal International |
container_volume |
155 |
container_issue |
3 |
container_start_page |
991 |
op_container_end_page |
1005 |
_version_ |
1766006058023649280 |