New palaeomagnetic results from Icelandic Neogene lavas
In this paper, some statistical properties of new collections of palaeomagnetic direction and intensity data are presented and compared with results from older collections. The new data come mostly from three composite surveys in the basalt lava pile of Iceland, totalling about 1000 lavas of ages 7–...
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1995
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fthighwire:oai:open-archive.highwire.org:gji:121/2/435 2023-05-15T16:50:12+02:00 New palaeomagnetic results from Icelandic Neogene lavas Kristjansson, Leo 1995-05-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/121/2/435 https://doi.org/10.1111/j.1365-246X.1995.tb05724.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/121/2/435 http://dx.doi.org/10.1111/j.1365-246X.1995.tb05724.x Copyright (C) 1995, Oxford University Press Articles TEXT 1995 fthighwire https://doi.org/10.1111/j.1365-246X.1995.tb05724.x 2012-11-23T22:11:52Z In this paper, some statistical properties of new collections of palaeomagnetic direction and intensity data are presented and compared with results from older collections. The new data come mostly from three composite surveys in the basalt lava pile of Iceland, totalling about 1000 lavas of ages 7–14 Myr. The palaeomagnetism of all these lavas converges on a reproducible long-term pattern in several important features of the Neogene field behaviour. Previous conclusions which are confirmed in this paper include: (1) the distribution of intermediate virtual geomagnetic poles (VGPs) is not confined to preferred longitude intervals; (2) normal- and reverse-polarity states of the geomagnetic field are essentially equivalent as regards the intensity of the field, mean field directions, and secular variation; (3) the virtual geomagnetic dipole moment falls off with decreasing VGP latitude, by a factor of 3.5–4 between polar and equatorial latitudes: (4) a significant reduction in the between-flow angular dispersion of VGPs may have occurred during the last 14 Myr; and (5) palaeomagnetic directions from Icelandic basalt lavas are stable and reliable. Text Iceland HighWire Press (Stanford University) Geophysical Journal International 121 2 435 443 |
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Articles |
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Articles Kristjansson, Leo New palaeomagnetic results from Icelandic Neogene lavas |
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description |
In this paper, some statistical properties of new collections of palaeomagnetic direction and intensity data are presented and compared with results from older collections. The new data come mostly from three composite surveys in the basalt lava pile of Iceland, totalling about 1000 lavas of ages 7–14 Myr. The palaeomagnetism of all these lavas converges on a reproducible long-term pattern in several important features of the Neogene field behaviour. Previous conclusions which are confirmed in this paper include: (1) the distribution of intermediate virtual geomagnetic poles (VGPs) is not confined to preferred longitude intervals; (2) normal- and reverse-polarity states of the geomagnetic field are essentially equivalent as regards the intensity of the field, mean field directions, and secular variation; (3) the virtual geomagnetic dipole moment falls off with decreasing VGP latitude, by a factor of 3.5–4 between polar and equatorial latitudes: (4) a significant reduction in the between-flow angular dispersion of VGPs may have occurred during the last 14 Myr; and (5) palaeomagnetic directions from Icelandic basalt lavas are stable and reliable. |
format |
Text |
author |
Kristjansson, Leo |
author_facet |
Kristjansson, Leo |
author_sort |
Kristjansson, Leo |
title |
New palaeomagnetic results from Icelandic Neogene lavas |
title_short |
New palaeomagnetic results from Icelandic Neogene lavas |
title_full |
New palaeomagnetic results from Icelandic Neogene lavas |
title_fullStr |
New palaeomagnetic results from Icelandic Neogene lavas |
title_full_unstemmed |
New palaeomagnetic results from Icelandic Neogene lavas |
title_sort |
new palaeomagnetic results from icelandic neogene lavas |
publisher |
Oxford University Press |
publishDate |
1995 |
url |
http://gji.oxfordjournals.org/cgi/content/short/121/2/435 https://doi.org/10.1111/j.1365-246X.1995.tb05724.x |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/121/2/435 http://dx.doi.org/10.1111/j.1365-246X.1995.tb05724.x |
op_rights |
Copyright (C) 1995, Oxford University Press |
op_doi |
https://doi.org/10.1111/j.1365-246X.1995.tb05724.x |
container_title |
Geophysical Journal International |
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121 |
container_issue |
2 |
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435 |
op_container_end_page |
443 |
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1766040374179004416 |