Inter-profile correlation of the Chinese loess/paleosol sequences during Marine Oxygen Isotope Stage 5 and indications of pedogenesis
Low-field magnetic susceptibility has been widely used to determine the pedostratigraphy of the Chinese loess/paleosol sequences. However, uncertainties remain in correlating between the loess magnetic susceptibility and the marine oxygen isotope records because susceptibility variations are affecte...
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ftsouthampton:oai:eprints.soton.ac.uk:41267 2023-07-30T04:04:09+02:00 Inter-profile correlation of the Chinese loess/paleosol sequences during Marine Oxygen Isotope Stage 5 and indications of pedogenesis Liu, Qingsong Banerjee, Subir K. Jackson, Michael J. Deng, Chenglong Pan, Yongxin Zhu, Rixiang 2005-01 https://eprints.soton.ac.uk/41267/ unknown Liu, Qingsong, Banerjee, Subir K., Jackson, Michael J., Deng, Chenglong, Pan, Yongxin and Zhu, Rixiang (2005) Inter-profile correlation of the Chinese loess/paleosol sequences during Marine Oxygen Isotope Stage 5 and indications of pedogenesis. Quaternary Science Reviews, 24 (1-2), 195-210. (doi:10.1016/j.quascirev.2004.07.021 <http://dx.doi.org/10.1016/j.quascirev.2004.07.021>). Article PeerReviewed 2005 ftsouthampton https://doi.org/10.1016/j.quascirev.2004.07.021 2023-07-09T20:49:03Z Low-field magnetic susceptibility has been widely used to determine the pedostratigraphy of the Chinese loess/paleosol sequences. However, uncertainties remain in correlating between the loess magnetic susceptibility and the marine oxygen isotope records because susceptibility variations are affected by both global and local paleoclimatic changes. To provide a more sound paleoclimatic interpretation of magnetic susceptibility variations, age models across Marine Oxygen Isotope Stage (MIS) 5 for the Jiuzhoutai (JZT) and Yuanbao (YB) sections, western Chinese Loess Plateau, were constructed through an integrated approach by linking the major pedostratigraphic boundaries of the loess profiles to the SPECMAP oxygen isotope curve, and by correlating relative magnetic paleointensity records with both the SINT800 global paleointensity stack from marine sediments and 36Cl records from the GRIP ice core. Results indicate good correlation of SIRM60 mT (a residual remanence of saturation isothermal remanent magnetization after a 60 mT alternating field demagnetization) variations between these two sites, which agree well with fluctuations in subtropical Atlantic sea surface temperatures. All cooling events recorded by ice-core and Atlantic marine sediments within MIS5 have counterparts in SIRM60 mT. SIRM60 mT is partially controlled by the degree of low-temperature oxidation, which is strongly temperature dependent. However, strong pedogenesis can decrease SIRM60 mT due to further oxidation of partially oxidized magnetites above some critical points. Therefore, we propose that SIRM60 mT is best suited to record paleotemperature changes in loess profiles from the western Chinese Loess Plateau, where pedogenesis is the weakest. Furthermore, by inter-profile correlation between the YB and JZT sections, we note that the seemingly uniform sub-paleosol unit with a broad susceptibility peak (previously assigned to MIS5c) between 34.4 and 37.4 m in the YB profile actually consists of two independent units (lower part of S1L1/MIS5b ... Article in Journal/Newspaper ice core University of Southampton: e-Prints Soton Quaternary Science Reviews 24 1-2 195 210 |
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University of Southampton: e-Prints Soton |
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ftsouthampton |
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description |
Low-field magnetic susceptibility has been widely used to determine the pedostratigraphy of the Chinese loess/paleosol sequences. However, uncertainties remain in correlating between the loess magnetic susceptibility and the marine oxygen isotope records because susceptibility variations are affected by both global and local paleoclimatic changes. To provide a more sound paleoclimatic interpretation of magnetic susceptibility variations, age models across Marine Oxygen Isotope Stage (MIS) 5 for the Jiuzhoutai (JZT) and Yuanbao (YB) sections, western Chinese Loess Plateau, were constructed through an integrated approach by linking the major pedostratigraphic boundaries of the loess profiles to the SPECMAP oxygen isotope curve, and by correlating relative magnetic paleointensity records with both the SINT800 global paleointensity stack from marine sediments and 36Cl records from the GRIP ice core. Results indicate good correlation of SIRM60 mT (a residual remanence of saturation isothermal remanent magnetization after a 60 mT alternating field demagnetization) variations between these two sites, which agree well with fluctuations in subtropical Atlantic sea surface temperatures. All cooling events recorded by ice-core and Atlantic marine sediments within MIS5 have counterparts in SIRM60 mT. SIRM60 mT is partially controlled by the degree of low-temperature oxidation, which is strongly temperature dependent. However, strong pedogenesis can decrease SIRM60 mT due to further oxidation of partially oxidized magnetites above some critical points. Therefore, we propose that SIRM60 mT is best suited to record paleotemperature changes in loess profiles from the western Chinese Loess Plateau, where pedogenesis is the weakest. Furthermore, by inter-profile correlation between the YB and JZT sections, we note that the seemingly uniform sub-paleosol unit with a broad susceptibility peak (previously assigned to MIS5c) between 34.4 and 37.4 m in the YB profile actually consists of two independent units (lower part of S1L1/MIS5b ... |
format |
Article in Journal/Newspaper |
author |
Liu, Qingsong Banerjee, Subir K. Jackson, Michael J. Deng, Chenglong Pan, Yongxin Zhu, Rixiang |
spellingShingle |
Liu, Qingsong Banerjee, Subir K. Jackson, Michael J. Deng, Chenglong Pan, Yongxin Zhu, Rixiang Inter-profile correlation of the Chinese loess/paleosol sequences during Marine Oxygen Isotope Stage 5 and indications of pedogenesis |
author_facet |
Liu, Qingsong Banerjee, Subir K. Jackson, Michael J. Deng, Chenglong Pan, Yongxin Zhu, Rixiang |
author_sort |
Liu, Qingsong |
title |
Inter-profile correlation of the Chinese loess/paleosol sequences during Marine Oxygen Isotope Stage 5 and indications of pedogenesis |
title_short |
Inter-profile correlation of the Chinese loess/paleosol sequences during Marine Oxygen Isotope Stage 5 and indications of pedogenesis |
title_full |
Inter-profile correlation of the Chinese loess/paleosol sequences during Marine Oxygen Isotope Stage 5 and indications of pedogenesis |
title_fullStr |
Inter-profile correlation of the Chinese loess/paleosol sequences during Marine Oxygen Isotope Stage 5 and indications of pedogenesis |
title_full_unstemmed |
Inter-profile correlation of the Chinese loess/paleosol sequences during Marine Oxygen Isotope Stage 5 and indications of pedogenesis |
title_sort |
inter-profile correlation of the chinese loess/paleosol sequences during marine oxygen isotope stage 5 and indications of pedogenesis |
publishDate |
2005 |
url |
https://eprints.soton.ac.uk/41267/ |
genre |
ice core |
genre_facet |
ice core |
op_relation |
Liu, Qingsong, Banerjee, Subir K., Jackson, Michael J., Deng, Chenglong, Pan, Yongxin and Zhu, Rixiang (2005) Inter-profile correlation of the Chinese loess/paleosol sequences during Marine Oxygen Isotope Stage 5 and indications of pedogenesis. Quaternary Science Reviews, 24 (1-2), 195-210. (doi:10.1016/j.quascirev.2004.07.021 <http://dx.doi.org/10.1016/j.quascirev.2004.07.021>). |
op_doi |
https://doi.org/10.1016/j.quascirev.2004.07.021 |
container_title |
Quaternary Science Reviews |
container_volume |
24 |
container_issue |
1-2 |
container_start_page |
195 |
op_container_end_page |
210 |
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1772815357813194752 |