Integrated Pliocene-Pleistocene magnetostratigraphy and tephrostratigraphy of deep-sea sediments at IODP Site U1424 (Yamato Basin, Japan Sea)
Abstract Sediments from the semi-enclosed Japan Sea are sensitive to paleoclimatic perturbations and they offer great opportunities for many regional and global paleoceanographic and paleoclimatic studies. These studies often require a robust chronology. However, due to rare preservation of calcareo...
Published in: | Progress in Earth and Planetary Science |
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2020
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Online Access: | http://dx.doi.org/10.1186/s40645-020-00373-9 https://link.springer.com/content/pdf/10.1186/s40645-020-00373-9.pdf https://link.springer.com/article/10.1186/s40645-020-00373-9/fulltext.html |
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crspringernat:10.1186/s40645-020-00373-9 2023-05-15T17:48:12+02:00 Integrated Pliocene-Pleistocene magnetostratigraphy and tephrostratigraphy of deep-sea sediments at IODP Site U1424 (Yamato Basin, Japan Sea) Xuan, Chuang Jin, Yuxi Sugisaki, Saiko Satoguchi, Yasufumi Nagahashi, Yoshitaka UK Natural Environment Research Council UK Natural Environment Research Council Center for Advanced Marine Core Research (CMCR), Kochi University Japan Society for the Promotion of Science 2020 http://dx.doi.org/10.1186/s40645-020-00373-9 https://link.springer.com/content/pdf/10.1186/s40645-020-00373-9.pdf https://link.springer.com/article/10.1186/s40645-020-00373-9/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Progress in Earth and Planetary Science volume 7, issue 1 ISSN 2197-4284 General Earth and Planetary Sciences journal-article 2020 crspringernat https://doi.org/10.1186/s40645-020-00373-9 2022-01-04T14:43:11Z Abstract Sediments from the semi-enclosed Japan Sea are sensitive to paleoclimatic perturbations and they offer great opportunities for many regional and global paleoceanographic and paleoclimatic studies. These studies often require a robust chronology. However, due to rare preservation of calcareous microfossils and drastic changes in surface water salinity during glacial lowstands, the construction of a traditional oxygen isotope stratigraphy for Japan Sea sediments is often difficult. Here, we use sediments recovered at Integrated Ocean Drilling Program (IODP) Expedition 346 Site U1424 to build an integrated Pliocene-Pleistocene reference magnetostratigraphy and tephrostratigraphy for sedimentary sequences from the region. Rock magnetic experiments indicate that magnetic remanence of Site U1424 sediments are carried primarily by (titano)magnetite with small contributions from high coercivity minerals (e.g., hematite) and possibly iron sulphides (pyrrhotite and/or greigite). Dark-colored sediments appear to contain less (titano)magnetite probably due to reductive diagenesis under euxinic conditions. Natural remanent magnetization (NRM) of u-channel samples covering a continuous ~ 167.6 m sediment sequence at Site U1424 was repeatedly measured at 1 cm intervals before and after stepwise demagnetization. Despite lower NRM intensity in dark-colored sediments, NRM directional data from both dark- and light-colored sediments are considered suitable for the construction of magnetostratigraphy. Site U1424 sediments clearly recorded the majority of the polarity chrons and subchrons within the last ~ 4.89 Myr, with the Cobb Mountain subchron, the end of Kaena subchron, and the onset of Nunivak subchron less well preserved. Sixteen tephra layers from the site were sampled for chemical composition analyses and the results were correlated to reference tephrostratigraphy of the region. Ages of the identified tephras are consistent with and can be well integrated with the magnetostratigraphy. The resulting age model suggests that sedimentation rates at Site U1424 range between ~ 1.7 and 7.6 cm/kyr with an average of ~ 3.3 cm/kyr. The acquired magnetostratigraphy and tephrostratigraphy at Site U1424 provide a reference chronology that can be correlated with and transferred to other sediment sequences in the region to study paleoceanographic and paleoclimatic changes of the region as well as their links to other regional and global changes. Graphical abstract Article in Journal/Newspaper Nunivak Springer Nature (via Crossref) Yamato ENVELOPE(35.583,35.583,-71.417,-71.417) Progress in Earth and Planetary Science 7 1 |
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Open Polar |
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Springer Nature (via Crossref) |
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crspringernat |
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English |
topic |
General Earth and Planetary Sciences |
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General Earth and Planetary Sciences Xuan, Chuang Jin, Yuxi Sugisaki, Saiko Satoguchi, Yasufumi Nagahashi, Yoshitaka Integrated Pliocene-Pleistocene magnetostratigraphy and tephrostratigraphy of deep-sea sediments at IODP Site U1424 (Yamato Basin, Japan Sea) |
topic_facet |
General Earth and Planetary Sciences |
description |
Abstract Sediments from the semi-enclosed Japan Sea are sensitive to paleoclimatic perturbations and they offer great opportunities for many regional and global paleoceanographic and paleoclimatic studies. These studies often require a robust chronology. However, due to rare preservation of calcareous microfossils and drastic changes in surface water salinity during glacial lowstands, the construction of a traditional oxygen isotope stratigraphy for Japan Sea sediments is often difficult. Here, we use sediments recovered at Integrated Ocean Drilling Program (IODP) Expedition 346 Site U1424 to build an integrated Pliocene-Pleistocene reference magnetostratigraphy and tephrostratigraphy for sedimentary sequences from the region. Rock magnetic experiments indicate that magnetic remanence of Site U1424 sediments are carried primarily by (titano)magnetite with small contributions from high coercivity minerals (e.g., hematite) and possibly iron sulphides (pyrrhotite and/or greigite). Dark-colored sediments appear to contain less (titano)magnetite probably due to reductive diagenesis under euxinic conditions. Natural remanent magnetization (NRM) of u-channel samples covering a continuous ~ 167.6 m sediment sequence at Site U1424 was repeatedly measured at 1 cm intervals before and after stepwise demagnetization. Despite lower NRM intensity in dark-colored sediments, NRM directional data from both dark- and light-colored sediments are considered suitable for the construction of magnetostratigraphy. Site U1424 sediments clearly recorded the majority of the polarity chrons and subchrons within the last ~ 4.89 Myr, with the Cobb Mountain subchron, the end of Kaena subchron, and the onset of Nunivak subchron less well preserved. Sixteen tephra layers from the site were sampled for chemical composition analyses and the results were correlated to reference tephrostratigraphy of the region. Ages of the identified tephras are consistent with and can be well integrated with the magnetostratigraphy. The resulting age model suggests that sedimentation rates at Site U1424 range between ~ 1.7 and 7.6 cm/kyr with an average of ~ 3.3 cm/kyr. The acquired magnetostratigraphy and tephrostratigraphy at Site U1424 provide a reference chronology that can be correlated with and transferred to other sediment sequences in the region to study paleoceanographic and paleoclimatic changes of the region as well as their links to other regional and global changes. Graphical abstract |
author2 |
UK Natural Environment Research Council UK Natural Environment Research Council Center for Advanced Marine Core Research (CMCR), Kochi University Japan Society for the Promotion of Science |
format |
Article in Journal/Newspaper |
author |
Xuan, Chuang Jin, Yuxi Sugisaki, Saiko Satoguchi, Yasufumi Nagahashi, Yoshitaka |
author_facet |
Xuan, Chuang Jin, Yuxi Sugisaki, Saiko Satoguchi, Yasufumi Nagahashi, Yoshitaka |
author_sort |
Xuan, Chuang |
title |
Integrated Pliocene-Pleistocene magnetostratigraphy and tephrostratigraphy of deep-sea sediments at IODP Site U1424 (Yamato Basin, Japan Sea) |
title_short |
Integrated Pliocene-Pleistocene magnetostratigraphy and tephrostratigraphy of deep-sea sediments at IODP Site U1424 (Yamato Basin, Japan Sea) |
title_full |
Integrated Pliocene-Pleistocene magnetostratigraphy and tephrostratigraphy of deep-sea sediments at IODP Site U1424 (Yamato Basin, Japan Sea) |
title_fullStr |
Integrated Pliocene-Pleistocene magnetostratigraphy and tephrostratigraphy of deep-sea sediments at IODP Site U1424 (Yamato Basin, Japan Sea) |
title_full_unstemmed |
Integrated Pliocene-Pleistocene magnetostratigraphy and tephrostratigraphy of deep-sea sediments at IODP Site U1424 (Yamato Basin, Japan Sea) |
title_sort |
integrated pliocene-pleistocene magnetostratigraphy and tephrostratigraphy of deep-sea sediments at iodp site u1424 (yamato basin, japan sea) |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
http://dx.doi.org/10.1186/s40645-020-00373-9 https://link.springer.com/content/pdf/10.1186/s40645-020-00373-9.pdf https://link.springer.com/article/10.1186/s40645-020-00373-9/fulltext.html |
long_lat |
ENVELOPE(35.583,35.583,-71.417,-71.417) |
geographic |
Yamato |
geographic_facet |
Yamato |
genre |
Nunivak |
genre_facet |
Nunivak |
op_source |
Progress in Earth and Planetary Science volume 7, issue 1 ISSN 2197-4284 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1186/s40645-020-00373-9 |
container_title |
Progress in Earth and Planetary Science |
container_volume |
7 |
container_issue |
1 |
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1766153464041177088 |