A 20–15 ka high-resolution paleomagnetic secular variation record from Black Sea sediments – no evidence for the ‘Hilina Pali excursion’?
A comprehensive magnetostratigraphic investigation on sixteen sediment cores from the southeastern Black Sea yielded a very detailed high-quality paleosecular variation (PSV) record spanning from 20 to 15 ka. The age models are based on radiocarbon dating, stratigraphic correlation, and tephrochrono...
Published in: | Earth and Planetary Science Letters |
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2018
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_3158917 2023-05-15T14:59:14+02:00 A 20–15 ka high-resolution paleomagnetic secular variation record from Black Sea sediments – no evidence for the ‘Hilina Pali excursion’? Liu, J. Nowaczyk, N. Frank, U. Arz, H. 2018 https://gfzpublic.gfz-potsdam.de/pubman/item/item_3158917 unknown info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2018.04.014 info:eu-repo/semantics/altIdentifier/urn/http://doi.crossref.org/servlet/query?format=unixref&pid=bib@gfz-potsdam.de&id=10.1016/j.epsl.2018.04.014 https://gfzpublic.gfz-potsdam.de/pubman/item/item_3158917 Earth and Planetary Science Letters info:eu-repo/semantics/article 2018 ftgfzpotsdam https://doi.org/10.1016/j.epsl.2018.04.014 2022-09-14T05:54:08Z A comprehensive magnetostratigraphic investigation on sixteen sediment cores from the southeastern Black Sea yielded a very detailed high-quality paleosecular variation (PSV) record spanning from 20 to 15 ka. The age models are based on radiocarbon dating, stratigraphic correlation, and tephrochronology. Further age constraints were obtained by correlating four meltwater events, described from the western Black Sea, ranging in age from about 17 to 15 ka, with maxima in K/Ti ratios, obtained from X-ray fluorescence (XRF) scanning, and minima in S-ratios, reflecting increased hematite content, in the studied cores. Since the sedimentation rates in the investigated time window are up to 50 cm ka−1, the obtained PSVs records enabled a stacking using 50-yr bins. A directional anomaly at 18.5 ka, associated with pronounced swings in inclination and declination, as well as a low in relative paleointensity (rPI), is probably contemporaneous with the Hilina Pali excursion, originally reported from Hawaiian lava flows. However, virtual geomagnetic poles (VGPs) calculated from Black Sea sediments are not located at latitudes lower than 60°N, which denotes normal, though pronounced secular variations. During the postulated Hilina Pali excursion, the VGPs calculated from Black Sea data migrated clockwise only along the coasts of the Arctic Ocean from NE Canada (20.0 ka), via Alaska (18.6 ka) and NE Siberia (18.0 ka) to Svalbard (17.0 ka), then looping clockwise through the Eastern Arctic Ocean. Article in Journal/Newspaper Arctic Arctic Ocean Svalbard Alaska Siberia GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Arctic Arctic Ocean Svalbard Canada Earth and Planetary Science Letters 492 174 185 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
description |
A comprehensive magnetostratigraphic investigation on sixteen sediment cores from the southeastern Black Sea yielded a very detailed high-quality paleosecular variation (PSV) record spanning from 20 to 15 ka. The age models are based on radiocarbon dating, stratigraphic correlation, and tephrochronology. Further age constraints were obtained by correlating four meltwater events, described from the western Black Sea, ranging in age from about 17 to 15 ka, with maxima in K/Ti ratios, obtained from X-ray fluorescence (XRF) scanning, and minima in S-ratios, reflecting increased hematite content, in the studied cores. Since the sedimentation rates in the investigated time window are up to 50 cm ka−1, the obtained PSVs records enabled a stacking using 50-yr bins. A directional anomaly at 18.5 ka, associated with pronounced swings in inclination and declination, as well as a low in relative paleointensity (rPI), is probably contemporaneous with the Hilina Pali excursion, originally reported from Hawaiian lava flows. However, virtual geomagnetic poles (VGPs) calculated from Black Sea sediments are not located at latitudes lower than 60°N, which denotes normal, though pronounced secular variations. During the postulated Hilina Pali excursion, the VGPs calculated from Black Sea data migrated clockwise only along the coasts of the Arctic Ocean from NE Canada (20.0 ka), via Alaska (18.6 ka) and NE Siberia (18.0 ka) to Svalbard (17.0 ka), then looping clockwise through the Eastern Arctic Ocean. |
format |
Article in Journal/Newspaper |
author |
Liu, J. Nowaczyk, N. Frank, U. Arz, H. |
spellingShingle |
Liu, J. Nowaczyk, N. Frank, U. Arz, H. A 20–15 ka high-resolution paleomagnetic secular variation record from Black Sea sediments – no evidence for the ‘Hilina Pali excursion’? |
author_facet |
Liu, J. Nowaczyk, N. Frank, U. Arz, H. |
author_sort |
Liu, J. |
title |
A 20–15 ka high-resolution paleomagnetic secular variation record from Black Sea sediments – no evidence for the ‘Hilina Pali excursion’? |
title_short |
A 20–15 ka high-resolution paleomagnetic secular variation record from Black Sea sediments – no evidence for the ‘Hilina Pali excursion’? |
title_full |
A 20–15 ka high-resolution paleomagnetic secular variation record from Black Sea sediments – no evidence for the ‘Hilina Pali excursion’? |
title_fullStr |
A 20–15 ka high-resolution paleomagnetic secular variation record from Black Sea sediments – no evidence for the ‘Hilina Pali excursion’? |
title_full_unstemmed |
A 20–15 ka high-resolution paleomagnetic secular variation record from Black Sea sediments – no evidence for the ‘Hilina Pali excursion’? |
title_sort |
20–15 ka high-resolution paleomagnetic secular variation record from black sea sediments – no evidence for the ‘hilina pali excursion’? |
publishDate |
2018 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_3158917 |
geographic |
Arctic Arctic Ocean Svalbard Canada |
geographic_facet |
Arctic Arctic Ocean Svalbard Canada |
genre |
Arctic Arctic Ocean Svalbard Alaska Siberia |
genre_facet |
Arctic Arctic Ocean Svalbard Alaska Siberia |
op_source |
Earth and Planetary Science Letters |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2018.04.014 info:eu-repo/semantics/altIdentifier/urn/http://doi.crossref.org/servlet/query?format=unixref&pid=bib@gfz-potsdam.de&id=10.1016/j.epsl.2018.04.014 https://gfzpublic.gfz-potsdam.de/pubman/item/item_3158917 |
op_doi |
https://doi.org/10.1016/j.epsl.2018.04.014 |
container_title |
Earth and Planetary Science Letters |
container_volume |
492 |
container_start_page |
174 |
op_container_end_page |
185 |
_version_ |
1766331356955017216 |