Analyses of primary remanence vector data from a large collection of lava flows: towards improved methodology in paleo-geomagnetism

Research into the properties of past geomagnetic fields (paleo-geomagnetism) has been carried out worldwide for over half a century. This research utilizes rocks which are to a varying degree inadequate for that purpose, and evaluation of the results is therefore not always on firm ground. One resou...

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Published in:Studia Geophysica et Geodaetica
Main Author: Kristjansson, Leo
Format: Article in Journal/Newspaper
Language:unknown
Subjects:
7
550
Online Access:https://kramerius.lib.cas.cz/view/uuid:39b0305f-f241-4399-b2ac-4ed3c7246980
https://doi.org/10.1007/s11200-012-0480-4
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spelling ftczechacademysc:oai:kramerius.lib.cas.cz:uuid:39b0305f-f241-4399-b2ac-4ed3c7246980 2024-03-17T08:58:34+00:00 Analyses of primary remanence vector data from a large collection of lava flows: towards improved methodology in paleo-geomagnetism Kristjansson, Leo print https://kramerius.lib.cas.cz/view/uuid:39b0305f-f241-4399-b2ac-4ed3c7246980 https://doi.org/10.1007/s11200-012-0480-4 unknown https://kramerius.lib.cas.cz/view/uuid:39b0305f-f241-4399-b2ac-4ed3c7246980 doi:https://doi.org/10.1007/s11200-012-0480-4 policy:private geofyzika geophysics paleomagnetism Iceland Neogene secular variation paleointensity 7 550 model:article ftczechacademysc https://doi.org/10.1007/s11200-012-0480-4 2024-02-19T23:34:17Z Research into the properties of past geomagnetic fields (paleo-geomagnetism) has been carried out worldwide for over half a century. This research utilizes rocks which are to a varying degree inadequate for that purpose, and evaluation of the results is therefore not always on firm ground. One resource which can be utilized to constrain several aspects of the interpretation of other paleo-geomagnetic data, consists of stable primary remanence vectors in large homogeneous collections of dated fresh lava flows. We outline how the available remanence data from several thousand lavas in Iceland may be analysed in a semi-quantitative way to test some of current results, methodology and concepts of paleo-geomagnetism. Among topics where such analysis provides new insights, are the geomagnetic polarity time scale, the frequency distribution of virtual geomagnetic poles in latitude and longitude, and the relative intensity of the magnetic field as a function of virtual pole latitude. Comparison of the scatter in remanence intensities and in absolute paleointensity determinations on Icelandic lavas indicates, along with other evidence, that quality criteria for the latter are in need of revising. It is also confirmed here that long-term changes have occurred in the amplitude of the geomagnetic secular variation; they should be taken into account in studies on other properties of the paleo-geomagnetic field. Leo Kristjansson. Obsahuje seznam literatury Article in Journal/Newspaper Iceland Czech Academy of Sciences: dKNAV Studia Geophysica et Geodaetica 57 4 543 564
institution Open Polar
collection Czech Academy of Sciences: dKNAV
op_collection_id ftczechacademysc
language unknown
topic geofyzika
geophysics
paleomagnetism
Iceland
Neogene
secular variation
paleointensity
7
550
spellingShingle geofyzika
geophysics
paleomagnetism
Iceland
Neogene
secular variation
paleointensity
7
550
Kristjansson, Leo
Analyses of primary remanence vector data from a large collection of lava flows: towards improved methodology in paleo-geomagnetism
topic_facet geofyzika
geophysics
paleomagnetism
Iceland
Neogene
secular variation
paleointensity
7
550
description Research into the properties of past geomagnetic fields (paleo-geomagnetism) has been carried out worldwide for over half a century. This research utilizes rocks which are to a varying degree inadequate for that purpose, and evaluation of the results is therefore not always on firm ground. One resource which can be utilized to constrain several aspects of the interpretation of other paleo-geomagnetic data, consists of stable primary remanence vectors in large homogeneous collections of dated fresh lava flows. We outline how the available remanence data from several thousand lavas in Iceland may be analysed in a semi-quantitative way to test some of current results, methodology and concepts of paleo-geomagnetism. Among topics where such analysis provides new insights, are the geomagnetic polarity time scale, the frequency distribution of virtual geomagnetic poles in latitude and longitude, and the relative intensity of the magnetic field as a function of virtual pole latitude. Comparison of the scatter in remanence intensities and in absolute paleointensity determinations on Icelandic lavas indicates, along with other evidence, that quality criteria for the latter are in need of revising. It is also confirmed here that long-term changes have occurred in the amplitude of the geomagnetic secular variation; they should be taken into account in studies on other properties of the paleo-geomagnetic field. Leo Kristjansson. Obsahuje seznam literatury
format Article in Journal/Newspaper
author Kristjansson, Leo
author_facet Kristjansson, Leo
author_sort Kristjansson, Leo
title Analyses of primary remanence vector data from a large collection of lava flows: towards improved methodology in paleo-geomagnetism
title_short Analyses of primary remanence vector data from a large collection of lava flows: towards improved methodology in paleo-geomagnetism
title_full Analyses of primary remanence vector data from a large collection of lava flows: towards improved methodology in paleo-geomagnetism
title_fullStr Analyses of primary remanence vector data from a large collection of lava flows: towards improved methodology in paleo-geomagnetism
title_full_unstemmed Analyses of primary remanence vector data from a large collection of lava flows: towards improved methodology in paleo-geomagnetism
title_sort analyses of primary remanence vector data from a large collection of lava flows: towards improved methodology in paleo-geomagnetism
url https://kramerius.lib.cas.cz/view/uuid:39b0305f-f241-4399-b2ac-4ed3c7246980
https://doi.org/10.1007/s11200-012-0480-4
genre Iceland
genre_facet Iceland
op_relation https://kramerius.lib.cas.cz/view/uuid:39b0305f-f241-4399-b2ac-4ed3c7246980
doi:https://doi.org/10.1007/s11200-012-0480-4
op_rights policy:private
op_doi https://doi.org/10.1007/s11200-012-0480-4
container_title Studia Geophysica et Geodaetica
container_volume 57
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