Polarity reversals of remanent magnetization in a sedimentary core from Northwind Ridge, western Arctic Ocean
We studied the remanent magnetization of a sedimentary core PC2 (6.48m length) drilled during the MR99-K05 cruise of JAMSTEC in the western Arctic Ocean. Discrete specimens and u-channel samples were used in the study. In the discrete specimens, the change of remanent magnetization with depth show m...
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ftnipr:oai:nipr.repo.nii.ac.jp:00003151 2023-05-15T14:46:37+02:00 Polarity reversals of remanent magnetization in a sedimentary core from Northwind Ridge, western Arctic Ocean Sakai,Hideo Banba,Yasuko Horii,Masae Itaki,Takuya Ahagon,Naoichi Kikawa,Eiichi 2005-10 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3151 http://id.nii.ac.jp/1291/00003151/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3151&item_no=1&attribute_id=18&file_no=1 en eng Department of Earth Sciences, Toyama University/Department of Earth Sciences, Toyama University/Department of System Engineering of Materials and Lifescience, Toyama University/Department of Earth and Planetary Sciences, The University of Tokyo/Division of Earth and Planetary Sciences, Hokkaido University/Independent Administrative Institution, Japan Agency for Marine-Earth Science and Technology National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3151 http://id.nii.ac.jp/1291/00003151/ AA1130866X Polar geoscience, 18, 67-82(2005-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3151&item_no=1&attribute_id=18&file_no=1 magnetization of sedimentary core polarity reversals western Arctic Ocean glacial-interglacial cycles Departmental Bulletin Paper P(論文) 2005 ftnipr 2022-12-03T19:43:04Z We studied the remanent magnetization of a sedimentary core PC2 (6.48m length) drilled during the MR99-K05 cruise of JAMSTEC in the western Arctic Ocean. Discrete specimens and u-channel samples were used in the study. In the discrete specimens, the change of remanent magnetization with depth show many clear polarity reversals in both inclination and declination. Furthermore, most reversals in discrete specimens correlated well with those in the u-channel samples. Core PC2 is characterized by distinct alternations of dark gray and brownish layers. Through comparison of lithostratigraphic cycles with glacial-interglacial cycles (referring to R.L. Phillips and A. Grantz, Geol. Soc. Am. Bull., 109, 1101, 1997), sedimentary cycles of core PC2 are correlated to marine isotope stages up to MIS-8. This indicates that polarity reversals of remanent magnetization in core PC2 are geomagnetic excursions in the Brunhes epoch. Comparison with the previously known geomagnetic excursions shows that the polarity reversals are clear and have long duration in core PC2. This feature may be related to characteristic geomagnetism around the western Arctic Ocean. Report Arctic Arctic Ocean Polar geoscience National Institute of Polar Research Repository, Japan Arctic Arctic Ocean |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
magnetization of sedimentary core polarity reversals western Arctic Ocean glacial-interglacial cycles |
spellingShingle |
magnetization of sedimentary core polarity reversals western Arctic Ocean glacial-interglacial cycles Sakai,Hideo Banba,Yasuko Horii,Masae Itaki,Takuya Ahagon,Naoichi Kikawa,Eiichi Polarity reversals of remanent magnetization in a sedimentary core from Northwind Ridge, western Arctic Ocean |
topic_facet |
magnetization of sedimentary core polarity reversals western Arctic Ocean glacial-interglacial cycles |
description |
We studied the remanent magnetization of a sedimentary core PC2 (6.48m length) drilled during the MR99-K05 cruise of JAMSTEC in the western Arctic Ocean. Discrete specimens and u-channel samples were used in the study. In the discrete specimens, the change of remanent magnetization with depth show many clear polarity reversals in both inclination and declination. Furthermore, most reversals in discrete specimens correlated well with those in the u-channel samples. Core PC2 is characterized by distinct alternations of dark gray and brownish layers. Through comparison of lithostratigraphic cycles with glacial-interglacial cycles (referring to R.L. Phillips and A. Grantz, Geol. Soc. Am. Bull., 109, 1101, 1997), sedimentary cycles of core PC2 are correlated to marine isotope stages up to MIS-8. This indicates that polarity reversals of remanent magnetization in core PC2 are geomagnetic excursions in the Brunhes epoch. Comparison with the previously known geomagnetic excursions shows that the polarity reversals are clear and have long duration in core PC2. This feature may be related to characteristic geomagnetism around the western Arctic Ocean. |
format |
Report |
author |
Sakai,Hideo Banba,Yasuko Horii,Masae Itaki,Takuya Ahagon,Naoichi Kikawa,Eiichi |
author_facet |
Sakai,Hideo Banba,Yasuko Horii,Masae Itaki,Takuya Ahagon,Naoichi Kikawa,Eiichi |
author_sort |
Sakai,Hideo |
title |
Polarity reversals of remanent magnetization in a sedimentary core from Northwind Ridge, western Arctic Ocean |
title_short |
Polarity reversals of remanent magnetization in a sedimentary core from Northwind Ridge, western Arctic Ocean |
title_full |
Polarity reversals of remanent magnetization in a sedimentary core from Northwind Ridge, western Arctic Ocean |
title_fullStr |
Polarity reversals of remanent magnetization in a sedimentary core from Northwind Ridge, western Arctic Ocean |
title_full_unstemmed |
Polarity reversals of remanent magnetization in a sedimentary core from Northwind Ridge, western Arctic Ocean |
title_sort |
polarity reversals of remanent magnetization in a sedimentary core from northwind ridge, western arctic ocean |
publisher |
Department of Earth Sciences, Toyama University/Department of Earth Sciences, Toyama University/Department of System Engineering of Materials and Lifescience, Toyama University/Department of Earth and Planetary Sciences, The University of Tokyo/Division of Earth and Planetary Sciences, Hokkaido University/Independent Administrative Institution, Japan Agency for Marine-Earth Science and Technology |
publishDate |
2005 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3151 http://id.nii.ac.jp/1291/00003151/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3151&item_no=1&attribute_id=18&file_no=1 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Polar geoscience |
genre_facet |
Arctic Arctic Ocean Polar geoscience |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3151 http://id.nii.ac.jp/1291/00003151/ AA1130866X Polar geoscience, 18, 67-82(2005-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3151&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766317834138288128 |