Changes in mean magnetic susceptibility and its anisotropy of rock samples as a result of alternating field demagnetization
International audience Measurements of low-field magnetic susceptibility (K) and its anisotropy (AMS) on different rock types during stepwise alternating field (AF) demagnetization in increasing fields revealed not only significant changes of the AMS principal susceptibilities, but also an increase...
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Online Access: | https://hal.science/hal-00311589 https://doi.org/10.1016/j.epsl.2006.12.025 |
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ftinsu:oai:HAL:hal-00311589v1 2023-06-18T03:37:48+02:00 Changes in mean magnetic susceptibility and its anisotropy of rock samples as a result of alternating field demagnetization Jordanova, Diana Jordanova, Neli Henry, Bernard Hus, Jozef Bascou, Jerôme Funaki, Minoru Dimov, Dimo Geophysical Institute Sofia Bulgarian Academy of Sciences (BAS) Geophysical Institute of Bulgarian Academy of Sciences Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Centre de Physique du Globe B 5670 Dourbes (viroinval) Belgium (CENTRE DE PHYSIQUE DU GLOBE DE DOURBES) centre de Physique du globe de Dourbes (Belgique) NIPR 1-9-10 Kaga, Itabashi-ku, Tokyo 173-8515, Japan (NIPR) NIPR, 1-9-10 Kaga, Itabashi-ku, Tokyo 173-8515 Japon Department of Geology and Geography Sofia Sofia University "St. Kliment Ohridski" 2007 https://hal.science/hal-00311589 https://doi.org/10.1016/j.epsl.2006.12.025 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2006.12.025 hal-00311589 https://hal.science/hal-00311589 doi:10.1016/j.epsl.2006.12.025 ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-00311589 Earth and Planetary Science Letters, 2007, 255 (3-4), pp.390-401. ⟨10.1016/j.epsl.2006.12.025⟩ magnetic susceptibility AF-demagnetization multidomain grains loess intrusive rocks gneiss [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology info:eu-repo/semantics/article Journal articles 2007 ftinsu https://doi.org/10.1016/j.epsl.2006.12.025 2023-06-05T22:01:46Z International audience Measurements of low-field magnetic susceptibility (K) and its anisotropy (AMS) on different rock types during stepwise alternating field (AF) demagnetization in increasing fields revealed not only significant changes of the AMS principal susceptibilities, but also an increase of the mean magnetic susceptibility (Km). Studied collections of loess/paleosol samples from different sections in Belgium, Bulgaria, China, Siberia and Tadjikistan and diorites, granites and gneisses from Antarctica show systematic Km-increase, between 2 and 27% as compared to the initial values, after AF-demagnetization up to 100 or 200 mT maximum amplitude. The relationships between magnetic susceptibility increase and magnetic hysteresis parameters and their ratios, indicate that the Km-increase is due to changes in magnetic domain configuration of the initial natural remanent magnetization (NRM) state of the remanence carriers during AF-treatment. The obtained linear relationship between K-increase and the degree of anisotropy P′ for strongly anisotropic gneiss samples suggests that magnetostatic interactions also play a role in the observed AF-effect on Km. Article in Journal/Newspaper Antarc* Antarctica Siberia Institut national des sciences de l'Univers: HAL-INSU Earth and Planetary Science Letters 255 3-4 390 401 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
magnetic susceptibility AF-demagnetization multidomain grains loess intrusive rocks gneiss [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
spellingShingle |
magnetic susceptibility AF-demagnetization multidomain grains loess intrusive rocks gneiss [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology Jordanova, Diana Jordanova, Neli Henry, Bernard Hus, Jozef Bascou, Jerôme Funaki, Minoru Dimov, Dimo Changes in mean magnetic susceptibility and its anisotropy of rock samples as a result of alternating field demagnetization |
topic_facet |
magnetic susceptibility AF-demagnetization multidomain grains loess intrusive rocks gneiss [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
description |
International audience Measurements of low-field magnetic susceptibility (K) and its anisotropy (AMS) on different rock types during stepwise alternating field (AF) demagnetization in increasing fields revealed not only significant changes of the AMS principal susceptibilities, but also an increase of the mean magnetic susceptibility (Km). Studied collections of loess/paleosol samples from different sections in Belgium, Bulgaria, China, Siberia and Tadjikistan and diorites, granites and gneisses from Antarctica show systematic Km-increase, between 2 and 27% as compared to the initial values, after AF-demagnetization up to 100 or 200 mT maximum amplitude. The relationships between magnetic susceptibility increase and magnetic hysteresis parameters and their ratios, indicate that the Km-increase is due to changes in magnetic domain configuration of the initial natural remanent magnetization (NRM) state of the remanence carriers during AF-treatment. The obtained linear relationship between K-increase and the degree of anisotropy P′ for strongly anisotropic gneiss samples suggests that magnetostatic interactions also play a role in the observed AF-effect on Km. |
author2 |
Geophysical Institute Sofia Bulgarian Academy of Sciences (BAS) Geophysical Institute of Bulgarian Academy of Sciences Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Centre de Physique du Globe B 5670 Dourbes (viroinval) Belgium (CENTRE DE PHYSIQUE DU GLOBE DE DOURBES) centre de Physique du globe de Dourbes (Belgique) NIPR 1-9-10 Kaga, Itabashi-ku, Tokyo 173-8515, Japan (NIPR) NIPR, 1-9-10 Kaga, Itabashi-ku, Tokyo 173-8515 Japon Department of Geology and Geography Sofia Sofia University "St. Kliment Ohridski" |
format |
Article in Journal/Newspaper |
author |
Jordanova, Diana Jordanova, Neli Henry, Bernard Hus, Jozef Bascou, Jerôme Funaki, Minoru Dimov, Dimo |
author_facet |
Jordanova, Diana Jordanova, Neli Henry, Bernard Hus, Jozef Bascou, Jerôme Funaki, Minoru Dimov, Dimo |
author_sort |
Jordanova, Diana |
title |
Changes in mean magnetic susceptibility and its anisotropy of rock samples as a result of alternating field demagnetization |
title_short |
Changes in mean magnetic susceptibility and its anisotropy of rock samples as a result of alternating field demagnetization |
title_full |
Changes in mean magnetic susceptibility and its anisotropy of rock samples as a result of alternating field demagnetization |
title_fullStr |
Changes in mean magnetic susceptibility and its anisotropy of rock samples as a result of alternating field demagnetization |
title_full_unstemmed |
Changes in mean magnetic susceptibility and its anisotropy of rock samples as a result of alternating field demagnetization |
title_sort |
changes in mean magnetic susceptibility and its anisotropy of rock samples as a result of alternating field demagnetization |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00311589 https://doi.org/10.1016/j.epsl.2006.12.025 |
genre |
Antarc* Antarctica Siberia |
genre_facet |
Antarc* Antarctica Siberia |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-00311589 Earth and Planetary Science Letters, 2007, 255 (3-4), pp.390-401. ⟨10.1016/j.epsl.2006.12.025⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2006.12.025 hal-00311589 https://hal.science/hal-00311589 doi:10.1016/j.epsl.2006.12.025 |
op_doi |
https://doi.org/10.1016/j.epsl.2006.12.025 |
container_title |
Earth and Planetary Science Letters |
container_volume |
255 |
container_issue |
3-4 |
container_start_page |
390 |
op_container_end_page |
401 |
_version_ |
1769010582582722560 |