Component NRM directions for sediment core HLY0503-06JPC
The Arctic oceans have been fertile ground for the recording of apparent excursions of the geomagnetic field, implying that the high latitude field had unusual characteristics at least over the last 1–2 Myrs. Alternating field demagnetization of the natural remanent magnetization (NRM) of Core HLY05...
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.804615 https://doi.org/10.1594/PANGAEA.804615 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.804615 2023-05-15T14:24:52+02:00 Component NRM directions for sediment core HLY0503-06JPC Channell, James E T Xuang, Chuang LATITUDE: 78.293817 * LONGITUDE: -176.986150 * DATE/TIME START: 2005-08-18T00:00:00 * DATE/TIME END: 2005-08-18T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.03 m * MAXIMUM DEPTH, sediment/rock: 12.87 m 2013-01-02 text/tab-separated-values, 4568 data points https://doi.pangaea.de/10.1594/PANGAEA.804615 https://doi.org/10.1594/PANGAEA.804615 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.804615 https://doi.org/10.1594/PANGAEA.804615 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Channell, James E T; Xuang, Chuang (2009): Self-reversal and apparent magnetic excursions in Arctic sediments. Earth and Planetary Science Letters, 284(1-2), 124-131, https://doi.org/10.1016/J.Epsl.2009.04.020 Core section label Declination DEPTH sediment/rock Healy Healy-Oden Trans Arctic Expedition 2005 (HOTRAX05) HLY0503 HLY0503-06JPC Inclination JPC Jumbo Piston Core Maximum angular deviation Mendeleev Ridge Arctic Ocean Dataset 2013 ftpangaea https://doi.org/10.1594/PANGAEA.804615 https://doi.org/10.1016/J.Epsl.2009.04.020 2023-01-20T09:00:06Z The Arctic oceans have been fertile ground for the recording of apparent excursions of the geomagnetic field, implying that the high latitude field had unusual characteristics at least over the last 1–2 Myrs. Alternating field demagnetization of the natural remanent magnetization (NRM) of Core HLY0503-6JPC from the Mendeleev Ridge (Arctic Ocean) implies the presence of primary magnetizations with negative inclination apparently recording excursions in sediments deposited during the Brunhes Chron. Thermal demagnetization, on the other hand, indicates the presence of multiple (often anti-parallel) magnetization components with negative inclination components having blocking temperatures predominantly, but not entirely, below ~ 350 °C. Thermo-magnetic tests, X-ray diffraction (XRD) and scanning electron microscopy (SEM) indicate that the negative inclination components are carried by titanomaghemite, presumably formed by seafloor oxidation of titanomagnetite. The titanomaghemite apparently carries a chemical remanent magnetization (CRM) that is partially self-reversed relative to the detrital remanent magnetization (DRM) carried by the host titanomagnetite. The partial self-reversal could have been accomplished by ionic ordering during oxidation, thereby changing the balance of the magnetic moments in the ferrimagnetic sublattices. Dataset Arctic Arctic Arctic Ocean PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean ENVELOPE(-176.986150,-176.986150,78.293817,78.293817) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Core section label Declination DEPTH sediment/rock Healy Healy-Oden Trans Arctic Expedition 2005 (HOTRAX05) HLY0503 HLY0503-06JPC Inclination JPC Jumbo Piston Core Maximum angular deviation Mendeleev Ridge Arctic Ocean |
spellingShingle |
Core section label Declination DEPTH sediment/rock Healy Healy-Oden Trans Arctic Expedition 2005 (HOTRAX05) HLY0503 HLY0503-06JPC Inclination JPC Jumbo Piston Core Maximum angular deviation Mendeleev Ridge Arctic Ocean Channell, James E T Xuang, Chuang Component NRM directions for sediment core HLY0503-06JPC |
topic_facet |
Core section label Declination DEPTH sediment/rock Healy Healy-Oden Trans Arctic Expedition 2005 (HOTRAX05) HLY0503 HLY0503-06JPC Inclination JPC Jumbo Piston Core Maximum angular deviation Mendeleev Ridge Arctic Ocean |
description |
The Arctic oceans have been fertile ground for the recording of apparent excursions of the geomagnetic field, implying that the high latitude field had unusual characteristics at least over the last 1–2 Myrs. Alternating field demagnetization of the natural remanent magnetization (NRM) of Core HLY0503-6JPC from the Mendeleev Ridge (Arctic Ocean) implies the presence of primary magnetizations with negative inclination apparently recording excursions in sediments deposited during the Brunhes Chron. Thermal demagnetization, on the other hand, indicates the presence of multiple (often anti-parallel) magnetization components with negative inclination components having blocking temperatures predominantly, but not entirely, below ~ 350 °C. Thermo-magnetic tests, X-ray diffraction (XRD) and scanning electron microscopy (SEM) indicate that the negative inclination components are carried by titanomaghemite, presumably formed by seafloor oxidation of titanomagnetite. The titanomaghemite apparently carries a chemical remanent magnetization (CRM) that is partially self-reversed relative to the detrital remanent magnetization (DRM) carried by the host titanomagnetite. The partial self-reversal could have been accomplished by ionic ordering during oxidation, thereby changing the balance of the magnetic moments in the ferrimagnetic sublattices. |
format |
Dataset |
author |
Channell, James E T Xuang, Chuang |
author_facet |
Channell, James E T Xuang, Chuang |
author_sort |
Channell, James E T |
title |
Component NRM directions for sediment core HLY0503-06JPC |
title_short |
Component NRM directions for sediment core HLY0503-06JPC |
title_full |
Component NRM directions for sediment core HLY0503-06JPC |
title_fullStr |
Component NRM directions for sediment core HLY0503-06JPC |
title_full_unstemmed |
Component NRM directions for sediment core HLY0503-06JPC |
title_sort |
component nrm directions for sediment core hly0503-06jpc |
publisher |
PANGAEA |
publishDate |
2013 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.804615 https://doi.org/10.1594/PANGAEA.804615 |
op_coverage |
LATITUDE: 78.293817 * LONGITUDE: -176.986150 * DATE/TIME START: 2005-08-18T00:00:00 * DATE/TIME END: 2005-08-18T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.03 m * MAXIMUM DEPTH, sediment/rock: 12.87 m |
long_lat |
ENVELOPE(-176.986150,-176.986150,78.293817,78.293817) |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Arctic Ocean |
op_source |
Supplement to: Channell, James E T; Xuang, Chuang (2009): Self-reversal and apparent magnetic excursions in Arctic sediments. Earth and Planetary Science Letters, 284(1-2), 124-131, https://doi.org/10.1016/J.Epsl.2009.04.020 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.804615 https://doi.org/10.1594/PANGAEA.804615 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.804615 https://doi.org/10.1016/J.Epsl.2009.04.020 |
_version_ |
1766297314103656448 |